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Gillmann SM, Lorenz AW, Kaijser W, Nguyen HH, Haase P, Hering D. How tolerances, competition and dispersal shape benthic invertebrate colonisation in restored urban streams. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 929:172665. [PMID: 38653408 DOI: 10.1016/j.scitotenv.2024.172665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 04/19/2024] [Accepted: 04/19/2024] [Indexed: 04/25/2024]
Abstract
Biotic communities often respond poorly to river restoration activities and the drivers of community recovery after restoration are not fully understood. According to the Asymmetric Response Concept (ARC), dispersal capacity, species tolerances to stressors, and biotic interactions are three key drivers influencing community recovery of restored streams. However, the ARC remains to be tested. Here we used a dataset on benthic invertebrate communities of eleven restored stream sections in a former open sewer system that were sampled yearly over a period of eleven years. We applied four indices that reflect tolerance against chloride and organic pollution, the community's dispersal capacity and strength of competition to the benthic invertebrate taxa lists of each year and site. Subsequently, we used generalised linear mixed models to analyse the change of these indices over time since restoration. Dispersal capacity was high directly after restoration but continuously decreased over time. The initial communities thus consisted of good dispersers and were later joined by more slowly dispersing taxa. The tolerance to organic pollution also decreased over time, reflecting continuous improvement of water quality and an associated increase of sensitive species. On the contrary, chloride tolerances did not change, which could indicate a stable chloride level throughout the sampling period. Lastly, competition within the communities, reflected by interspecific trait niche overlap, increased with time since restoration. We show that recovery follows a specific pattern that is comparable between sites. Benthic communities change from tolerant, fast dispersing generalists to more sensitive, slowly dispersing specialists exposed to stronger competition. Our results lay support to the ARC (increasing role of competition, decreasing role of dispersal) but also underline that certain tolerances may still shape communities a decade after restoration. Disentangling the drivers of macroinvertebrate colonisation can help managers to better understand recovery trajectories and to define more realistic restoration targets.
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Affiliation(s)
- Svenja M Gillmann
- Department of Aquatic Ecology, Faculty of Biology, University of Duisburg-Essen, Essen, Germany; Centre for Water and Environmental Research (ZWU), University of Duisburg-Essen, Essen, Germany.
| | - Armin W Lorenz
- Department of Aquatic Ecology, Faculty of Biology, University of Duisburg-Essen, Essen, Germany; Centre for Water and Environmental Research (ZWU), University of Duisburg-Essen, Essen, Germany
| | - Willem Kaijser
- Department of Aquatic Ecology, Faculty of Biology, University of Duisburg-Essen, Essen, Germany
| | - Hong Hanh Nguyen
- Faculty of Biology, University of Duisburg-Essen, Essen, Germany; Department of River Ecology and Conservation, Senckenberg Research Institute and Natural History Museum Frankfurt, Gelnhausen, Germany
| | - Peter Haase
- Centre for Water and Environmental Research (ZWU), University of Duisburg-Essen, Essen, Germany; Faculty of Biology, University of Duisburg-Essen, Essen, Germany; Department of River Ecology and Conservation, Senckenberg Research Institute and Natural History Museum Frankfurt, Gelnhausen, Germany
| | - Daniel Hering
- Department of Aquatic Ecology, Faculty of Biology, University of Duisburg-Essen, Essen, Germany; Centre for Water and Environmental Research (ZWU), University of Duisburg-Essen, Essen, Germany
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2
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de Mendoza G, Gansfort B, Catalan J, Traunspurger W. Female proportion has a stronger influence on dispersal than body size in nematodes of mountain lakes. PLoS One 2024; 19:e0303864. [PMID: 38758759 PMCID: PMC11101049 DOI: 10.1371/journal.pone.0303864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Accepted: 05/01/2024] [Indexed: 05/19/2024] Open
Abstract
Nematodes disperse passively and are amongst the smallest invertebrates on Earth. Free-living nematodes in mountain lakes are highly tolerant of environmental variations and are thus excellent model organisms in dispersal studies, since species-environment relationships are unlikely to interfere. In this study, we investigated how population or organism traits influence the stochastic physical nature of passive dispersal in a topologically complex environment. Specifically, we analyzed the influence of female proportion and body size on the geographical distribution of nematode species in the mountain lakes of the Pyrenees. We hypothesized that dispersal is facilitated by (i) a smaller body size, which would increase the rate of wind transport, and (ii) a higher female proportion within a population, which could increase colonization success because many nematode species are capable of parthenogenetic reproduction. The results showed that nematode species with a low proportion of females tend to have clustered spatial distributions that are not associated with patchy environmental conditions, suggesting greater barriers to dispersal. When all species were pooled, the overall proportion of females tended to increase at the highest elevations, where dispersal between lakes is arguably more difficult. The influence of body size was barely relevant for nematode distributions. Our study highlights the relevance of female proportion as a mechanism that enhances the dispersal success of parthenogenetic species, and that female sex is a determining factor in metacommunity connectivity.
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Affiliation(s)
- Guillermo de Mendoza
- Institute of Geography, Faculty of Oceanography and Geography, University of Gdansk, Gdańsk, Poland
- Institute of Biology and Earth Sciences, Pomeranian University in Słupsk, Słupsk, Poland
| | - Birgit Gansfort
- Department of Animal Ecology, Bielefeld University, Bielefeld, Germany
| | - Jordi Catalan
- CREAF, Cerdanyola del Vallès, Barcelona, Spain
- CSIC, Bellaterra, Barcelona, Spain
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3
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Virgilio LR, de Melo HPS, da Silva Lima F, Takemoto RM, Camargo LMA, de Oliveira Meneguetti DU. Fish endoparasite metacommunity in environments with different degrees of conservation in the western Brazilian Amazon. Parasitol Res 2023; 122:2773-2793. [PMID: 37953321 DOI: 10.1007/s00436-023-08013-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Accepted: 10/04/2023] [Indexed: 11/14/2023]
Abstract
Parasite communities correspond to the definition of metacommunity, as species interact and disperse within hosts. The present study evaluated parasite metacommunities in a tropical floodplain. The study was conducted in the Western Amazon around the municipalities of Cruzeiro do Sul, state of Acre, and Guajará, state of Amazonas, Brazil. Six sampling sites were selected and grouped into conserved and degraded environments. Fish were caught between periods of drought and flood, using passive and active sampling methods; in the laboratory, they were measured weighed, and necropsied. Parasites found were fixed, evaluated, and identified. Physical and chemical variables and environmental conservation characteristics were measured in all sites. Diversity index, ANOVA, Tukey, local contribution to beta diversity (LCBD), species contribution to beta diversity by individual species (SCBD), and variance partitioning were summarized. The α species diversity increased in conserved environments and varied between seasonal periods, mainly in detritivorous and omnivorous hosts. Local contributions to beta diversity showed significantly higher values in conserved environments for the endoparasite fauna of piscivorous and omnivorous hosts, indicating that these environments presented unique parasite infracommunities and revealing the conservation status of these environments. Variations in infracommunities were explained mainly by niche-based processes, including environmental conditions, degree of conservation, and host characteristics. Thus, these data will serve as a tool to understand the way parasite communities are structured, which is important information for the management and conservation of aquatic environments.
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Affiliation(s)
- Lucena Rocha Virgilio
- Postgraduate Program in Biodiversity and Biotechnology, Bionorte, Federal University of Acre, Rio Branco, Acre, Brazil.
| | - Henrique Paulo Silva de Melo
- Laboratory of Aquatic Ecology, Federal University of Acre, Campus Floresta, Estrada Do Canela Fina, Cruzeiro Do Sul, Acre, Brazil
| | - Fabricia da Silva Lima
- Laboratory of Aquatic Ecology, Federal University of Acre, Campus Floresta, Estrada Do Canela Fina, Cruzeiro Do Sul, Acre, Brazil
| | - Ricardo Massato Takemoto
- Research Center in Limnology, Ichthyology and Aquaculture, Laboratory of Ichthyoparasitology, State University of Maringá, Maringá, Paraná, Brazil
| | | | - Dionatas Ulises de Oliveira Meneguetti
- Postgraduate Program in Biodiversity and Biotechnology, Bionorte, Federal University of Acre, Rio Branco, Acre, Brazil
- Laboratory of Tropical Medicine, Federal University of Acre, Rio Branco, Acre, Brazil
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4
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Simons AL, Theroux S, Osborne M, Nuzhdin S, Mazor R, Steele J. Zeta diversity patterns in metabarcoded lotic algal assemblages as a tool for bioassessment. ECOLOGICAL APPLICATIONS : A PUBLICATION OF THE ECOLOGICAL SOCIETY OF AMERICA 2023; 33:e2812. [PMID: 36708145 DOI: 10.1002/eap.2812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 12/07/2022] [Accepted: 12/20/2022] [Indexed: 06/18/2023]
Abstract
Assessments of the ecological health of algal assemblages in streams typically focus on measures of their local diversity and classify individuals by morphotaxonomy. Such assemblages are often connected through various ecological processes, such as dispersal, and may be more accurately assessed as components of regional-, rather than local-scale assemblages. With recent declines in the costs of sequencing and computation, it has also become increasingly feasible to use metabarcoding to more accurately classify algal species and perform regional-scale bioassessments. Recently, zeta diversity has been explored as a novel method of constructing regional bioassessments for groups of streams. Here, we model the use of zeta diversity to investigate whether stream health can be determined by the landscape diversity of algal assemblages. We also compare the use of DNA metabarcoding and morphotaxonomy classifications in these zeta diversity-based bioassessments of regional stream health. From 96 stream samples in California, we used various orders of zeta diversity to construct models of biotic integrity for multiple assemblages of diatoms, as well as hybrid assemblages of diatoms in combination with soft-bodied algae, using taxonomy data generated with both DNA sequencing as well as traditional morphotaxonomic approaches. We compared our ability to evaluate the ecological health of streams with the performance of multiple algal indices of biological condition. Our zeta diversity-based models of regional biotic integrity were more strongly correlated with existing indices for algal assemblages classified using metabarcoding compared to morphotaxonomy. Metabarcoding for diatoms and hybrid algal assemblages involved rbcL and 18S V9 primers, respectively. Importantly, we also found that these algal assemblages, independent of the classification method, are more likely to be assembled under a process of niche differentiation rather than stochastically. Taken together, these results suggest the potential for zeta diversity patterns of algal assemblages classified using metabarcoding to inform stream bioassessments.
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Affiliation(s)
- Ariel Levi Simons
- Dornsife College of Letters, Arts and Sciences, University of Southern California, Los Angeles, California, USA
| | - Susanna Theroux
- Southern California Coastal Water Research Project, Costa Mesa, California, USA
| | - Melisa Osborne
- Dornsife College of Letters, Arts and Sciences, University of Southern California, Los Angeles, California, USA
| | - Sergey Nuzhdin
- Dornsife College of Letters, Arts and Sciences, University of Southern California, Los Angeles, California, USA
| | - Raphael Mazor
- Southern California Coastal Water Research Project, Costa Mesa, California, USA
| | - Joshua Steele
- Southern California Coastal Water Research Project, Costa Mesa, California, USA
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5
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McFadden IR, Sendek A, Brosse M, Bach PM, Baity-Jesi M, Bolliger J, Bollmann K, Brockerhoff EG, Donati G, Gebert F, Ghosh S, Ho HC, Khaliq I, Lever JJ, Logar I, Moor H, Odermatt D, Pellissier L, de Queiroz LJ, Rixen C, Schuwirth N, Shipley JR, Twining CW, Vitasse Y, Vorburger C, Wong MKL, Zimmermann NE, Seehausen O, Gossner MM, Matthews B, Graham CH, Altermatt F, Narwani A. Linking human impacts to community processes in terrestrial and freshwater ecosystems. Ecol Lett 2023; 26:203-218. [PMID: 36560926 PMCID: PMC10107666 DOI: 10.1111/ele.14153] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 11/14/2022] [Accepted: 11/14/2022] [Indexed: 12/24/2022]
Abstract
Human impacts such as habitat loss, climate change and biological invasions are radically altering biodiversity, with greater effects projected into the future. Evidence suggests human impacts may differ substantially between terrestrial and freshwater ecosystems, but the reasons for these differences are poorly understood. We propose an integrative approach to explain these differences by linking impacts to four fundamental processes that structure communities: dispersal, speciation, species-level selection and ecological drift. Our goal is to provide process-based insights into why human impacts, and responses to impacts, may differ across ecosystem types using a mechanistic, eco-evolutionary comparative framework. To enable these insights, we review and synthesise (i) how the four processes influence diversity and dynamics in terrestrial versus freshwater communities, specifically whether the relative importance of each process differs among ecosystems, and (ii) the pathways by which human impacts can produce divergent responses across ecosystems, due to differences in the strength of processes among ecosystems we identify. Finally, we highlight research gaps and next steps, and discuss how this approach can provide new insights for conservation. By focusing on the processes that shape diversity in communities, we aim to mechanistically link human impacts to ongoing and future changes in ecosystems.
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Affiliation(s)
- Ian R McFadden
- Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Birmensdorf, Switzerland.,Institute of Terrestrial Ecosystems, ETH Zürich, Zurich, Switzerland
| | - Agnieszka Sendek
- Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Birmensdorf, Switzerland.,Swiss Federal Institute of Aquatic Science and Technology (Eawag), Dübendorf, Switzerland
| | - Morgane Brosse
- Swiss Federal Institute of Aquatic Science and Technology (Eawag), Dübendorf, Switzerland
| | - Peter M Bach
- Swiss Federal Institute of Aquatic Science and Technology (Eawag), Dübendorf, Switzerland
| | - Marco Baity-Jesi
- Swiss Federal Institute of Aquatic Science and Technology (Eawag), Dübendorf, Switzerland
| | - Janine Bolliger
- Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Birmensdorf, Switzerland
| | - Kurt Bollmann
- Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Birmensdorf, Switzerland
| | - Eckehard G Brockerhoff
- Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Birmensdorf, Switzerland.,School of Biological Sciences, University of Canterbury, Christchurch, New Zealand
| | - Giulia Donati
- Swiss Federal Institute of Aquatic Science and Technology (Eawag), Dübendorf, Switzerland
| | - Friederike Gebert
- Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Birmensdorf, Switzerland
| | - Shyamolina Ghosh
- Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Birmensdorf, Switzerland
| | - Hsi-Cheng Ho
- Swiss Federal Institute of Aquatic Science and Technology (Eawag), Dübendorf, Switzerland
| | - Imran Khaliq
- Swiss Federal Institute of Aquatic Science and Technology (Eawag), Dübendorf, Switzerland
| | - J Jelle Lever
- Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Birmensdorf, Switzerland.,Swiss Federal Institute of Aquatic Science and Technology (Eawag), Dübendorf, Switzerland
| | - Ivana Logar
- Swiss Federal Institute of Aquatic Science and Technology (Eawag), Dübendorf, Switzerland
| | - Helen Moor
- Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Birmensdorf, Switzerland.,Swiss Federal Institute of Aquatic Science and Technology (Eawag), Dübendorf, Switzerland
| | - Daniel Odermatt
- Swiss Federal Institute of Aquatic Science and Technology (Eawag), Dübendorf, Switzerland
| | - Loïc Pellissier
- Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Birmensdorf, Switzerland.,Institute of Terrestrial Ecosystems, ETH Zürich, Zurich, Switzerland
| | - Luiz Jardim de Queiroz
- Swiss Federal Institute of Aquatic Science and Technology (Eawag), Kastanienbaum, Switzerland.,Institute of Ecology & Evolution, University of Bern, Bern, Switzerland
| | - Christian Rixen
- Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Davos, Switzerland
| | - Nele Schuwirth
- Swiss Federal Institute of Aquatic Science and Technology (Eawag), Dübendorf, Switzerland
| | - J Ryan Shipley
- Swiss Federal Institute of Aquatic Science and Technology (Eawag), Kastanienbaum, Switzerland
| | - Cornelia W Twining
- Swiss Federal Institute of Aquatic Science and Technology (Eawag), Kastanienbaum, Switzerland
| | - Yann Vitasse
- Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Birmensdorf, Switzerland
| | - Christoph Vorburger
- Swiss Federal Institute of Aquatic Science and Technology (Eawag), Dübendorf, Switzerland.,Institute of Integrative Biology, Department of Environmental Systems Science, ETH Zürich, Zurich, Switzerland
| | - Mark K L Wong
- Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Birmensdorf, Switzerland.,School of Biological Sciences, The University of Western Australia, Crawley, WA, Australia
| | - Niklaus E Zimmermann
- Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Birmensdorf, Switzerland
| | - Ole Seehausen
- Swiss Federal Institute of Aquatic Science and Technology (Eawag), Kastanienbaum, Switzerland.,Institute of Ecology & Evolution, University of Bern, Bern, Switzerland
| | - Martin M Gossner
- Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Birmensdorf, Switzerland.,Institute of Terrestrial Ecosystems, ETH Zürich, Zurich, Switzerland
| | - Blake Matthews
- Swiss Federal Institute of Aquatic Science and Technology (Eawag), Kastanienbaum, Switzerland
| | - Catherine H Graham
- Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Birmensdorf, Switzerland
| | - Florian Altermatt
- Swiss Federal Institute of Aquatic Science and Technology (Eawag), Dübendorf, Switzerland.,Department of Evolutionary Biology and Environmental Studies, University of Zurich, Zürich, Switzerland
| | - Anita Narwani
- Swiss Federal Institute of Aquatic Science and Technology (Eawag), Dübendorf, Switzerland
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6
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Gálvez Á, Peres-Neto PR, Castillo-Escrivà A, Bonilla F, Camacho A, García-Roger EM, Iepure S, Miralles-Lorenzo J, Monrós JS, Olmo C, Picazo A, Rojo C, Rueda J, Sahuquillo M, Sasa M, Segura M, Armengol X, Mesquita-Joanes F. Inconsistent response of taxonomic groups to space and environment in mediterranean and tropical pond metacommunities. Ecology 2023; 104:e3835. [PMID: 36199222 PMCID: PMC10078490 DOI: 10.1002/ecy.3835] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Accepted: 06/22/2022] [Indexed: 02/01/2023]
Abstract
The metacommunity concept provides a theoretical framework that aims at explaining organism distributions by a combination of environmental filtering, dispersal, and drift. However, few works have attempted a multitaxon approach and even fewer have compared two distant biogeographical regions using the same methodology. We tested the expectation that temperate (mediterranean-climate) pond metacommunities would be more influenced by environmental and spatial processes than tropical ones, because of stronger environmental gradients and a greater isolation of waterbodies. However, the pattern should be different among groups of organisms depending on their dispersal abilities. We surveyed 30 tropical and 32 mediterranean temporary ponds from Costa Rica and Spain, respectively, and obtained data on 49 environmental variables. We characterized the biological communities of bacteria and archaea (from the water column and the sediments), phytoplankton, zooplankton, benthic invertebrates, amphibians and birds, and estimated the relative role of space and environment on metacommunity organization for each group and region, by means of variation partitioning using generalized additive models. Purely environmental effects were important in both tropical and mediterranean ponds, but stronger in the latter, probably due to their larger limnological heterogeneity. Spatially correlated environment and pure spatial effects were greater in the tropics, related to higher climatic heterogeneity and dispersal processes (e.g., restriction, surplus) acting at different scales. The variability between taxonomic groups in the contribution of spatial and environmental factors to metacommunity variation was very wide, but higher in active, compared with passive, dispersers. Higher environmental effects were observed in mediterranean passive dispersers, and higher spatial effects in tropical passive dispersers. The unexplained variation was larger in the tropical setting, suggesting a higher role for stochastic processes, unmeasured environmental factors, or biotic interactions in the tropics, although this difference affected some actively dispersing groups (insects and birds) more than passive dispersers. These results, despite our limitations in comparing only two regions, provide support, for a wide variety of aquatic organisms, for the classic view of stronger abiotic niche constraints in temperate areas compared with the tropics. The heterogeneous response of taxonomic groups between regions also points to a stronger influence of regional context than organism adaptations on metacommunity organization.
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Affiliation(s)
- Ángel Gálvez
- Cavanilles Institute of Biodiversity and Evolutionary Biology, University of València, Paterna, Spain
| | | | - Andreu Castillo-Escrivà
- Cavanilles Institute of Biodiversity and Evolutionary Biology, University of València, Paterna, Spain
| | - Fabián Bonilla
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José, Costa Rica
| | - Antonio Camacho
- Cavanilles Institute of Biodiversity and Evolutionary Biology, University of València, Paterna, Spain
| | - Eduardo M García-Roger
- Cavanilles Institute of Biodiversity and Evolutionary Biology, University of València, Paterna, Spain
| | - Sanda Iepure
- Cavanilles Institute of Biodiversity and Evolutionary Biology, University of València, Paterna, Spain.,Emil Racovitza Institute of Speleology, Cluj Napoca, Romania
| | - Javier Miralles-Lorenzo
- Cavanilles Institute of Biodiversity and Evolutionary Biology, University of València, Paterna, Spain
| | - Juan S Monrós
- Cavanilles Institute of Biodiversity and Evolutionary Biology, University of València, Paterna, Spain
| | - Carla Olmo
- Cavanilles Institute of Biodiversity and Evolutionary Biology, University of València, Paterna, Spain
| | - Antonio Picazo
- Cavanilles Institute of Biodiversity and Evolutionary Biology, University of València, Paterna, Spain
| | - Carmen Rojo
- Cavanilles Institute of Biodiversity and Evolutionary Biology, University of València, Paterna, Spain
| | - Juan Rueda
- Cavanilles Institute of Biodiversity and Evolutionary Biology, University of València, Paterna, Spain
| | - María Sahuquillo
- Cavanilles Institute of Biodiversity and Evolutionary Biology, University of València, Paterna, Spain.,Subdirecció General del Medi Natural, Generalitat Valenciana, València, Spain
| | - Mahmood Sasa
- Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José, Costa Rica.,Museo de Zoología, Centro de Investigación en Biodiversidad y Ecología Tropical, Universidad de Costa Rica, San Pedro, Costa Rica
| | - Mati Segura
- Cavanilles Institute of Biodiversity and Evolutionary Biology, University of València, Paterna, Spain
| | - Xavier Armengol
- Cavanilles Institute of Biodiversity and Evolutionary Biology, University of València, Paterna, Spain
| | - Francesc Mesquita-Joanes
- Cavanilles Institute of Biodiversity and Evolutionary Biology, University of València, Paterna, Spain
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7
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Hou Y, Pan B, Jiang X, Li D, Jiang W, Zhao G. Directional spatial processes override non-directional ones in structuring communities of lotic macroinvertebrates differing in dispersal ability. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 317:115310. [PMID: 35642809 DOI: 10.1016/j.jenvman.2022.115310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 05/10/2022] [Accepted: 05/12/2022] [Indexed: 06/15/2023]
Abstract
Dispersal is an essential natural process that influences community assembly, yet directional dispersal through wind and water may have distinctive effects. Environmental and spatial factors jointly influence community structure, but their relative importance is anticipated to vary with spatial distance, dispersal mode, and season. Accordingly, a systemic survey was conducted in subtropical Chinese mountain lotic systems to distinguish the relative contributions of environmental control and spatial structuring upon communities of macroinvertebrates with different dispersal ability. Macroinvertebrate samples were collected from the upper reaches and five tributaries of the Hanjiang River in October 2017 (autumn) and April 2018 (spring). These macroinvertebrates were identified and classified into three dispersal groups: aquatic passive (AqPa), terrestrial passive (TePa), and terrestrial active (TeAc). Variation partitioning analyses were performed on environmental factors and different sets of spatial factors (overland dispersal: Overland, directional downwind dispersal: AEM_Wind, along watercourse dispersal: Watercourse, and directional downstream dispersal: AEM_Water). Findings showed that both environmental filtering and spatial structuring influenced the structure of macroinvertebrate metacommunities. For AqPa and TePa groups, pure environmental effects were stronger than pure spatial effects based on most distance matrices; however, in AEM_Water, the effects of spatial processes surpassed those of environmental filtering. For TeAc group, the role of environmental control and spatial structuring varied depending on different spatial models. The results also highlighted seasonal shifts in metacommunity structuring processes. Spatial structures featuring direction, especially AEM_Water, were predominant in explaining the construction of macroinvertebrate communities. This work suggests that directional dispersal should be explicitly considered when examining the structure of ecological communities.
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Affiliation(s)
- Yiming Hou
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an, 710048, China
| | - Baozhu Pan
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an, 710048, China.
| | - Xiaoming Jiang
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an, 710048, China
| | - Dianbao Li
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an, 710048, China
| | - Wanxiang Jiang
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an, 710048, China
| | - Gengnan Zhao
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an, 710048, China
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8
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Qin C, Ge Y, Gao J, Zhou S, Yu J, Wang B, Datry T. Ecological drivers of macroinvertebrate metacommunity assembly in a subtropical river basin in the Yangtze River Delta, China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 837:155687. [PMID: 35525362 DOI: 10.1016/j.scitotenv.2022.155687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2022] [Revised: 04/05/2022] [Accepted: 04/30/2022] [Indexed: 06/14/2023]
Abstract
Identifying the underlying ecological drivers of macroinvertebrate community assembly is fundamental to metacommunity ecology. Comparably, determining the influence of different drivers on beta diversity patterns can provide insight into processes governing community organization. Exploring the ecological drivers of metacommunity and beta diversity are major avenues to improve bioassessment, restoration, and river management, which are still poorly explored in China, especially in subtropical highly developed river networks. To address this gap, we use a dataset (macroinvertebrate communities and environmental variables) collected from the Yangtze River Delta, China to test the above ideas. We used the K-means clustering method to divide 405 river sites into three anthropogenic impacted groups, nearly pristine sites, moderately impacted sites, and heavily impacted sites, and subsequently used partial Mantel tests to investigate how species sorting and dispersal shaped the metacommunity that varied with the levels of anthropogenic impacts and to explore the responses of different components of beta diversity to environmental and spatial distances among sites for each group. Our results revealed that both species sorting and dispersal shape communities, but the importance of species sorting and dispersal varied with the levels of anthropogenic impacts. Nearly pristine sites were mostly shaped only by species sorting, while heavily impacted sites were shaped by dispersal. We also found that turnover was by far the dominant component of beta diversity across all levels of impact. Therefore, we encourage that environmental variables and spatial processes should be considered in bioassessment approaches. In addition, it is essential to focus on maintaining habitat heterogeneity and identifying and protecting regional species pools that could improve local biodiversity through dispersal for ecosystem management of the Yangtze River Delta of China.
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Affiliation(s)
- Chunyan Qin
- Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, PR China; INRAE, UR RiverLy, Centre de Lyon-Villeurbanne, 69626 Villeurbanne Cedex, France
| | - Yifei Ge
- Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Jin Gao
- Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, PR China
| | - Shengli Zhou
- Zhejiang Ecological and Environmental Monitoring Center, Zhejiang 310012, PR China
| | - Jian Yu
- Zhejiang Ecological and Environmental Monitoring Center, Zhejiang 310012, PR China
| | - Beixin Wang
- Department of Entomology, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, PR China.
| | - Thibault Datry
- INRAE, UR RiverLy, Centre de Lyon-Villeurbanne, 69626 Villeurbanne Cedex, France
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9
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Milošević D, Medeiros AS, Cvijanović D, Jenačković Gocić D, Đurđević A, Čerba D, Stojković Piperac M. Implications of local niche- and dispersal-based factors that may influence chironomid assemblages in bioassessment. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:51951-51963. [PMID: 35257340 DOI: 10.1007/s11356-022-19302-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Accepted: 02/15/2022] [Indexed: 06/14/2023]
Abstract
Local environmental factors and dispersal-based processes can both influence the structure of metacommunities in freshwater ecosystems. Describing these patterns is especially important for biomonitoring approaches that are based on inferences made from benthic macroinvertebrate assemblages. Here, we examine the metacommunity structure of chironomid assemblages collected from 28 sampling stations along the Southern Morava River, Serbia. We examined the extent of dispersal-based processes along a temporal scale. We obtained 8 models for the different sampling seasons that determined the spatial variables that best explained variability in chironomid assemblages. Spatial processes were found to be a significant predictor of variation for chironomids during the late winter/spring (March and May) and autumn (October and November), concordant with the known phenology of common taxa. Species sorting and mass effects were found to be significant processes that structured the chironomid metacommunity. In addition, biological interactions, inferred from fish biomass, and habitat traits, demonstrated by macrophyte and riparian vegetation, were found to influence species sorting. A high variability of chironomid metacommunity structure across sampling seasons suggests that monitoring programs that include macroinvertebrates in bioassessment should avoid months with pronounced spatial processes, and consequently maximize a correlation between community structure and local environmental factors.
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Affiliation(s)
- Djuradj Milošević
- Department of Biology and Ecology, Faculty of Sciences and Mathematics, University of Niš, Niš, Serbia.
- School for Resource and Environmental Studies, Faculty of Management, Dalhousie University, Halifax, Canada.
| | - Andrew S Medeiros
- School for Resource and Environmental Studies, Faculty of Management, Dalhousie University, Halifax, Canada
| | - Dušanka Cvijanović
- University of Novi Sad, Faculty of Sciences, Trg Dositeja Obradovića 3, Novi Sad, Serbia
| | - Dragana Jenačković Gocić
- Department of Biology and Ecology, Faculty of Sciences and Mathematics, University of Niš, Niš, Serbia
| | - Aca Đurđević
- Department of Biology and Ecology, Faculty of Sciences and Mathematics, University of Niš, Niš, Serbia
| | - Dubravka Čerba
- Department of Biology, Josip Juraj Strossmayer University of Osijek, Osijek, Croatia
| | - Milica Stojković Piperac
- Department of Biology and Ecology, Faculty of Sciences and Mathematics, University of Niš, Niš, Serbia
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10
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Fuentes N, Arriagada A. Long-term responses of macroinvertebrate assemblages to the 2011 eruption of the Puyehue-Cordón Caulle volcanic complex, Chile. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 807:150978. [PMID: 34656581 DOI: 10.1016/j.scitotenv.2021.150978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2021] [Revised: 10/04/2021] [Accepted: 10/10/2021] [Indexed: 06/13/2023]
Abstract
In June 2011 the Puyehue-Cordón Caulle volcanic complex (PCCVC) erupted, ejecting around 950 million metric tons of volcanic ash and pyroclastic rock, generating habitat destruction, environmental deterioration and devastation of ecological communities in rivers near the volcanic fissure. We evaluate the long-term effect of this eruptive event on the recovery of the diversity of aquatic macroinvertebrates, collecting biological and environmental information from 2011 to 2018 in visibly impacted Chilean rivers (Gol-Gol and Nilahue) and not visibly impacted rivers (Calcurrupe and Chanleufu). With the macroinvertebrate records we developed a recovery coefficient based on their diversity before and after the eruption. The results show that before the eruption (2009-2010), the accumulated family richness and mean diversity in the Gol-Gol River were higher than that observed post-eruption in rivers visibly impacted and not visibly impacted. Between 2013 and 2018, 17 families recolonized the Gol-Gol River, as well as 10 new families that were not recorded before the eruption. The richness of families post-eruption was negatively related to the increase in the concentration of total suspended solids, affecting the successional changes and recovery in the medium term. The recovery coefficient indicates that seven years after the eruption the diversity of macroinvertebrates still shows lower levels than those recorded before the eruptive event, with predominance of a slow recovery phase. Families of orders Ephemeroptera, Plecoptera and Trichoptera that were dominant before the eruption of the PCCVC began to recover the richness of taxa two years later, Plecoptera reaching 50% recolonization in 2018, Ephemeroptera 33.3% and Trichoptera 30%. In contrast, Diptera reached 100% recovery by 2018 and chironomids increased since 2015, becoming the dominant taxon during intermediate recovery in the Gol-Gol River. The recovery of macroinvertebrates in the Gol-Gol River is related to their modes of dispersal, feeding and the decrease in ash concentration.
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Affiliation(s)
- Norka Fuentes
- Laboratorio de Limnología, Departamento de Acuicultura y Recursos Agroalimentarios, Universidad de Los Lagos, Campus Osorno, Osorno, Chile.
| | - Aldo Arriagada
- Laboratorio de Limnología, Departamento de Acuicultura y Recursos Agroalimentarios, Universidad de Los Lagos, Campus Osorno, Osorno, Chile; Centro de Investigación en Recursos Naturales y Sustentabilidad (CIRENYS), Universidad Bernardo O'Higgins, Avenida Viel 1497, Santiago, Chile
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11
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Ge Y, Meng X, Heino J, García‐Girón J, Liu Y, Li Z, Xie Z. Stochasticity overrides deterministic processes in structuring macroinvertebrate communities in a plateau aquatic system. Ecosphere 2021. [DOI: 10.1002/ecs2.3675] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Affiliation(s)
- Yihao Ge
- The Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology Chinese Academy of Sciences Wuhan China
- University of Chinese Academy of Sciences Beijing China
| | - Xingliang Meng
- The Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology Chinese Academy of Sciences Wuhan China
| | - Jani Heino
- Freshwater Centre Finnish Environment Institute Paavo Havaksen Tie 3P.O. Box 413 Oulu FI‐90014 Finland
| | - Jorge García‐Girón
- Group for Limnology and Environmental Biotechnology Area of Ecology Universidad de León Campus de Vegazana León Spain
| | - Yang Liu
- The Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology Chinese Academy of Sciences Wuhan China
- University of Chinese Academy of Sciences Beijing China
| | - Zhengfei Li
- The Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology Chinese Academy of Sciences Wuhan China
| | - Zhicai Xie
- The Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology Chinese Academy of Sciences Wuhan China
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12
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Li Z, Chen X, Jiang X, Tonkin JD, Xie Z, Heino J. Distance decay of benthic macroinvertebrate communities in a mountain river network: Do dispersal routes and dispersal ability matter? THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 758:143630. [PMID: 33218801 DOI: 10.1016/j.scitotenv.2020.143630] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Revised: 10/19/2020] [Accepted: 11/07/2020] [Indexed: 06/11/2023]
Abstract
Environmental heterogeneity and dispersal limitation are important drivers of beta diversity; however, their relative influence on the two fundamental components of beta diversity (i.e., species replacement and richness difference) has not been fully examined in montane streams. Here, we examined the relative importance of local environmental gradients and three physical distance matrices (i.e., overland, watercourse and cost distances) on beta diversity and its two components for a macroinvertebrate metacommunity in a stream network. To provide additional insights into community assembly, we also analysed variation in two deconstructed sub-communities based on dispersal ability (i.e., weak and strong dispersers). Both environmental filters and physical distances (dispersal limitation) drove patterns of overall beta diversity, with the former generally prevailing over the latter. Species replacement components showed stronger correlations with environmental gradients than physical distances, while the opposite is true for the richness difference components. Overland distances were generally more important than cost and watercourse distances for community dissimilarity of stream macroinvertebrates, implying that lateral dispersal out of stream corridors through flight was the major dispersal route in the studied steam network. As expected, community dissimilarity of strong dispersers was primarily shaped by environmental filtering, while community dissimilarity of weak dispersers was associated with the joint effects of environmental filtering and dispersal limitation. Our findings demonstrate that partitioning overall dissimilarity into species replacement and richness difference provides more insights into the processes driving spatial variability in biological communities compared with the utilization of total beta diversity alone. Our results support the notion that maintaining environmental heterogeneity and natural connectivity of stream networks should be effective measures to conserve regional biodiversity.
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Affiliation(s)
- Zhengfei Li
- The Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
| | - Xiao Chen
- The Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Xiaoming Jiang
- The Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; State Key Laboratory of Eco-hydraulic in Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048, China.
| | - Jonathan D Tonkin
- School of Biological Sciences, University of Canterbury, Christchurch 8140, New Zealand.
| | - Zhicai Xie
- The Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
| | - Jani Heino
- Freshwater Centre, Finnish Environment Institute, Paavo Havaksen Tie 3, P.O. Box 413, FI-90014 Oulu, Finland.
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13
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Abstract
Perhaps more than any other ecological discipline, invasion biology has married the practices of basic science and the application of that science. The conceptual frameworks of population regulation, metapopulations, supply-side ecology, and community assembly have all to some degree informed the regulation, management, and prevention of biological invasions. Invasion biology needs to continue to adopt emerging frameworks and paradigms to progress as both a basic and applied science. This need is urgent as the biological invasion problem continues to worsen. The development of metacommunity theory in the last two decades represents a paradigm-shifting approach to community ecology that emphasizes the multi-scale nature of community assembly and biodiversity regulation. Work on metacommunities has demonstrated that even relatively simple processes at local scales are often heavily influenced by regional-scale processes driven primarily by the dispersal of organisms. Often the influence of dispersal interacts with, or even swamps, the influence of local-scale drivers like environmental conditions and species interactions. An emphasis on dispersal and a focus on multi-scale processes enable metacommunity theory to contribute strongly to the advancement of invasion biology. Propagule pressure of invaders has been identified as one of the most important drivers facilitating invasion, so the metacommunity concept, designed to address how dispersal-driven dynamics affect community structure, can directly address many of the central questions of invasion biology. Here we revisit many of the important concepts and paradigms of biological invasions—propagule pressure, biotic resistance, enemy release, functional traits, neonative species, human-assisted transport,—and view those concepts through the lens of metacommunity theory. In doing so, we accomplish several goals. First, we show that work on metacommunities has generated multiple predictions, models, and the tools that can be directly applied to invasion scenarios. Among these predictions is that invasibility of a community should decrease with both local controls on community assembly, and the dispersal rates of native species. Second, we demonstrate that framing biological invasions in metacommunity terms actually unifies several seemingly disparate concepts central to invasion biology. Finally, we recommend several courses of action for the control and management of invasive species that emerge from applying the concepts of metacommunity theory.
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14
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Zemmer SA, Detwiler JT, Sokol ER, Da Silva Neto JG, Wyderko J, Potts K, Gajewski ZJ, Sarment LV, Benfield EF, Belden LK. Spatial scale and structure of complex life cycle trematode parasite communities in streams. PLoS One 2020; 15:e0241973. [PMID: 33232346 PMCID: PMC7685432 DOI: 10.1371/journal.pone.0241973] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Accepted: 10/23/2020] [Indexed: 11/19/2022] Open
Abstract
By considering the role of site-level factors and dispersal, metacommunity concepts have advanced our understanding of the processes that structure ecological communities. In dendritic systems, like streams and rivers, these processes may be impacted by network connectivity and unidirectional current. Streams and rivers are central to the dispersal of many pathogens, including parasites with complex, multi-host life cycles. Patterns in parasite distribution and diversity are often driven by host dispersal. We conducted two studies at different spatial scales (within and across stream networks) to investigate the importance of local and regional processes that structure trematode (parasitic flatworms) communities in streams. First, we examined trematode communities in first-intermediate host snails (Elimia proxima) in a survey of Appalachian headwater streams within the Upper New River Basin to assess regional turnover in community structure. We analyzed trematode communities based on both morphotype (visual identification) and haplotype (molecular identification), as cryptic diversity in larval trematodes could mask important community-level variation. Second, we examined communities at multiple sites (headwaters and main stem) within a stream network to assess potential roles of network position and downstream drift. Across stream networks, we found a broad scale spatial pattern in morphotype- and haplotype-defined communities due to regional turnover in the dominant parasite type. This pattern was correlated with elevation, but not with any other environmental factors. Additionally, we found evidence of multiple species within morphotypes, and greater genetic diversity in parasites with hosts limited to in-stream dispersal. Within network parasite prevalence, for at least some parasite taxa, was related to several site-level factors (elevation, snail density and stream depth), and total prevalence decreased from headwaters to main stem. Variation in the distribution and diversity of parasites at the regional scale may reflect differences in the abilities of hosts to disperse across the landscape. Within a stream network, species-environment relationships may counter the effects of downstream dispersal on community structure.
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Affiliation(s)
- Sally A. Zemmer
- Biological Sciences, Virginia Polytechnic and State Institute, Blacksburg, Virginia, United States of America
- * E-mail:
| | | | - Eric R. Sokol
- Biological Sciences, Virginia Polytechnic and State Institute, Blacksburg, Virginia, United States of America
| | - Jeronimo G. Da Silva Neto
- Biological Sciences, Virginia Polytechnic and State Institute, Blacksburg, Virginia, United States of America
| | - Jennie Wyderko
- Biological Sciences, Virginia Polytechnic and State Institute, Blacksburg, Virginia, United States of America
| | - Kevin Potts
- Biological Sciences, Virginia Polytechnic and State Institute, Blacksburg, Virginia, United States of America
| | - Zachary J. Gajewski
- Biological Sciences, Virginia Polytechnic and State Institute, Blacksburg, Virginia, United States of America
| | - Lea V. Sarment
- Biological Sciences, Virginia Polytechnic and State Institute, Blacksburg, Virginia, United States of America
| | - E. F. Benfield
- Biological Sciences, Virginia Polytechnic and State Institute, Blacksburg, Virginia, United States of America
| | - Lisa K. Belden
- Biological Sciences, Virginia Polytechnic and State Institute, Blacksburg, Virginia, United States of America
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15
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Gálvez Á, Aguilar-Alberola JA, Armengol X, Bonilla F, Iepure S, Monrós JS, Olmo C, Rojo C, Rueda J, Rueda R, Sasa M, Mesquita-Joanes F. Environment and Space Rule, but Time Also Matters for the Organization of Tropical Pond Metacommunities. Front Ecol Evol 2020. [DOI: 10.3389/fevo.2020.558833] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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16
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Kurthen AL, He F, Dong X, Maasri A, Wu N, Cai Q, Jähnig SC. Metacommunity Structures of Macroinvertebrates and Diatoms in High Mountain Streams, Yunnan, China. Front Ecol Evol 2020. [DOI: 10.3389/fevo.2020.571887] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
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17
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Kotzian CB, Pires MM, Hepp LU. Effects of spatial distances on the assemblage dissimilarity of macroinvertebrates with different dispersal pathways and abilities in southern Brazilian streams. Ecol Res 2020. [DOI: 10.1111/1440-1703.12149] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Carla Bender Kotzian
- Postgraduate Program in Animal Biodiversity Federal University of Santa Maria Santa Maria Brazil
| | - Mateus Marques Pires
- Laboratory of Ecology and Conservation of Aquatic Ecosystems University of Vale do Rio dos Sinos Sao Leopoldo Brazil
| | - Luiz Ubiratan Hepp
- Department of Biological Sciences Integrated Regional University of Alto Uruguai and Missões Erechim Brazil
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18
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Li Z, Xing Y, Liu Z, Chen X, Jiang X, Xie Z, Heino J. Seasonal changes in metacommunity assembly mechanisms of benthic macroinvertebrates in a subtropical river basin. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 729:139046. [PMID: 32498180 DOI: 10.1016/j.scitotenv.2020.139046] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Revised: 04/22/2020] [Accepted: 04/25/2020] [Indexed: 06/11/2023]
Abstract
Unraveling the ecological factors that control variation in local community structure in space and time is fundamental to metacommunity ecology. In this scenario, environmental filtering and spatial processes are recognized as important drivers of community assembly, yet their relative importance is anticipated to vary for biological communities in different seasons, network positions and organisms with distinct dispersal modes. In this study, we used a dataset (macroinvertebrate communities and environmental variables) collected in different seasons from the Ganjiang River in China to test the above ideas. We divided the whole metacommunity in each season into mainstream communities, tributary communities, strictly aquatic dispersers and aquatic/aerial dispersers, and subsequently used variation partitioning to examine the relative contribution of environmental and spatial factors separately for the overall and decomposed components of the metacommunity. Our results showed that both environmental filtering and spatial processes were important drivers of variation in community structure, yet their explanatory powers varied considerably among seasons. Environmental filtering was the primary driver of metacommunity organization in most scenarios, while the effects of spatial processes surpassing environmental filtering occurred only sporadically. For communities in different network positions, tributary communities were structured by both strong environmental filtering and profound effects of spatial processes via dispersal limitation. However, communities in mainstream sites were mainly determined by environmental filtering, and the effects of spatial processes were almost negligible. Moreover, environmental filtering was clearly more important for aquatic/aerial dispersers, while spatial processes were more influential for strictly aquatic dispersers. We thus concluded that environmental filtering, spatial processes, network position and dispersal mode can interact to regulate metacommunity organization of riverine macroinvertebrates. Considering that the relative contribution of these factors varied among seasons, we strongly uphold the idea that community ecology research should go beyond one-season snapshot surveys in river networks.
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Affiliation(s)
- Zhengfei Li
- The Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Yuan Xing
- The Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhenyuan Liu
- The Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiao Chen
- The Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xuankong Jiang
- The Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhicai Xie
- The Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
| | - Jani Heino
- Freshwater Centre, Finnish Environment Institute, Paavo Havaksen Tie 3, P.O. Box 413, FI-90014 Oulu, Finland
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19
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Bowles DE. Caddisfly (Insecta: Trichoptera) diversity in the Ozarks and tallgrass prairie transitional zone, Arkansas and Missouri, USA. ECOSCIENCE 2020. [DOI: 10.1080/11956860.2020.1772611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- David E. Bowles
- National Park Service, Heartland Inventory & Monitoring Network, C/o Department of Biology, Missouri State University, Springfield, MO, USA
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20
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He S, Soininen J, Chen K, Wang B. Environmental Factors Override Dispersal-Related Factors in Shaping Diatom and Macroinvertebrate Communities Within Stream Networks in China. Front Ecol Evol 2020. [DOI: 10.3389/fevo.2020.00141] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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21
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Murray-Stoker D, Murray-Stoker KM. Consistent metacommunity structure despite inconsistent drivers of assembly at the continental scale. J Anim Ecol 2020; 89:1678-1689. [PMID: 32221972 DOI: 10.1111/1365-2656.13220] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2019] [Accepted: 02/21/2020] [Indexed: 12/01/2022]
Abstract
A fundamental goal of community ecology is to understand the drivers of community assembly and diversity. Local factors acting on community assembly are typically related to environmental conditions while regional factors are typically related to dispersal. Previous research has not consistently demonstrated the importance of local or regional factors, but this is likely because these factors act in concert and not in isolation. Studies that simultaneously integrate local and regional factors into analyses of community assembly can be a useful avenue to further our understanding of this core concept in community ecology. Here, we aimed to identify metacommunity structure and diversity and the local and regional drivers of community assembly at the continental scale. We evaluated metacommunity structure and drivers of assembly of macroinvertebrate communities in 941 rivers and streams nested within nine ecoregions distributed across the conterminous United States. Pattern-based metacommunity analyses and boosted regression tree techniques were used to (a) assign metacommunity structures and (b) identify the environmental, landscape and network drivers of assembly. We also evaluated how biodiversity scaled across hierarchical levels and varied among ecoregions. Metacommunity structures were consistent for the conterminous United States and each of the nine ecoregion subsets, with each ecoregional metacommunity displaying a Clementsian structure. Environmental variables were the predominant drivers of assembly, suggesting the importance of species sorting and environmental filtering on community structure; however, the identity of the most influential environmental variables differed among ecoregions and suggested hierarchical filtering on assembly. Partitioned diversity was found to be lower at the local and ecoregional levels, but turnover in diversity among ecoregions was higher than expected. Our results demonstrate contingencies in community assembly, notwithstanding consistency in metacommunity structure and support the importance of environmental control over community assembly and biodiversity. Moreover, biodiversity at the continental scale is likely maintained through this inherent variation in the drivers of assembly and concomitant changes in community composition among ecoregions. We suggest that further work should evaluate the assembly of other facets of community structure and the underlying mechanisms of the contingency in assembly drivers.
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Affiliation(s)
- David Murray-Stoker
- Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, ON, Canada
| | - Kelly M Murray-Stoker
- Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, ON, Canada
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22
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Gomes LF, Barbosa JC, de Oliveira Barbosa H, Vieira MC, Vieira LCG. Environmental and spatial influences on stream zooplankton communities of the Brazilian Cerrado. COMMUNITY ECOL 2020. [DOI: 10.1007/s42974-020-00008-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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23
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Andrade ICP, Krolow TK, Boldrini R, Pelicice FM. Diversity of EPT (Ephemeroptera, Plecoptera, Trichoptera) Along Streams Fragmented by Waterfalls in the Brazilian Savanna. NEOTROPICAL ENTOMOLOGY 2020; 49:203-212. [PMID: 31912446 DOI: 10.1007/s13744-019-00751-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Accepted: 12/13/2019] [Indexed: 06/10/2023]
Abstract
In stream ecosystems, waterfalls intercept the fluvial continuum and limit the dispersion of aquatic organisms. However, the barrier effect may be minimized or absent for insects whose life cycle is not restricted to the aquatic environment (i.e., winged adults), such as the orders Ephemeroptera, Plecoptera and Trichoptera (EPT). In this study, we investigated EPT diversity (abundance, richness, and composition) in savanna headwater streams (Cerrado Domain, Brazil) to investigate the hypothesis that large waterfalls have little effect on instream assemblage structure. During 2017 and 2018, we sampled EPTs and measured environmental conditions at reaches adjacent (downstream and upstream) to waterfalls (5 to 70 m high). We collected 2532 immature specimens of 33 genera, including the first record of 14 genera of Ephemeroptera, 11 Trichoptera, and three Plecoptera for the Tocantins State. Hydro-geomorphic and streambed conditions varied among sites, but they were not related to the presence of waterfalls. Assemblage structure was similar between downstream and upstream reaches, with no significant difference in taxa richness, abundance, and composition. This pattern was consistently observed considering all data combined, and each order separately. These results support the hypothesis that physical barriers have weak effects on EPT assemblages at small spatial scales, where strong dispersal and habitat similarity probably homogenizes the structure of local assemblages in stream corridors adjacent to large waterfalls. The study provides important information about factors driving the distribution of biodiversity in savanna streams, which are relevant to support conservation and management plans in the Brazilian Cerrado.
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Affiliation(s)
- I C P Andrade
- Programa de Pós-Graduação em Biodiversidade, Ecologia e Conservação (PPGBEC), Universidade Federal do Tocantins - UFT, Coordenação de Ciências Biológicas, Porto Nacional, TO, Brasil.
| | - T K Krolow
- Programa de Pós-Graduação em Biodiversidade, Ecologia e Conservação (PPGBEC), Universidade Federal do Tocantins - UFT, Coordenação de Ciências Biológicas, Porto Nacional, TO, Brasil
| | - R Boldrini
- Laboratório de Entomologia, Centro de Estudos da Biodiversidade (CBio), Univ Federal de Roraima (UFRR), Campus Paricarana, Boa Vista, Brasil
| | - F M Pelicice
- Programa de Pós-Graduação em Biodiversidade, Ecologia e Conservação (PPGBEC), Universidade Federal do Tocantins - UFT, Coordenação de Ciências Biológicas, Porto Nacional, TO, Brasil
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24
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He S, Soininen J, Deng G, Wang B. Metacommunity Structure of Stream Insects across Three Hierarchical Spatial scales. Ecol Evol 2020; 10:2874-2884. [PMID: 32211162 PMCID: PMC7083666 DOI: 10.1002/ece3.6103] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 01/21/2020] [Accepted: 01/24/2020] [Indexed: 11/08/2022] Open
Abstract
A major challenge in community ecology is to understand the underlying factors driving metacommunity (i.e., a set of local communities connected through species dispersal) dynamics. However, little is known about the effects of varying spatial scale on the relative importance of environmental and spatial (i.e., dispersal related) factors in shaping metacommunities and on the relevance of different dispersal pathways. Using a hierarchy of insect metacommunities at three spatial scales (a small, within-stream scale, intermediate, among-stream scale, and large, among-sub-basin scale), we assessed whether the relative importance of environmental and spatial factors shaping metacommunity structure varies predictably across spatial scales, and tested how the importance of different dispersal routes vary across spatial scales. We also studied if different dispersal ability groups differ in the balance between environmental and spatial control. Variation partitioning showed that environmental factors relative to spatial factors were more important for community composition at the within-stream scale. In contrast, spatial factors (i.e., eigenvectors from Moran's eigenvector maps) relative to environmental factors were more important at the among-sub-basin scale. These results indicate that environmental filtering is likely to be more important at the smallest scale with highest connectivity, while dispersal limitation seems to be more important at the largest scale with lowest connectivity. Community variation at the among-stream and among-sub-basin scales were strongly explained by geographical and topographical distances, indicating that overland pathways might be the main dispersal route at the larger scales among more isolated sites. The relative effect of environmental and spatial factors on insect communities varied between low and high dispersal ability groups; this variation was inconsistent among three hierarchical scales. In sum, our study indicates that spatial scale, connectivity, and dispersal ability jointly shape stream metacommunities.
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Affiliation(s)
- Siwen He
- Department of Entomology Nanjing Agricultural University Nanjing China
- Department of Geosciences and Geography University of Helsinki Helsinki Finland
| | - Janne Soininen
- Department of Geosciences and Geography University of Helsinki Helsinki Finland
| | - Guiping Deng
- Jiuzhaigou Administrative Bureau Jiuzhaigou County China
| | - Beixin Wang
- Department of Entomology Nanjing Agricultural University Nanjing China
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Brasil LS, Luiza-Andrade A, Calvão LB, Dias-Silva K, Faria APJ, Shimano Y, Oliveira-Junior JMB, Cardoso MN, Juen L. Aquatic insects and their environmental predictors: a scientometric study focused on environmental monitoring in lotic environmental. ENVIRONMENTAL MONITORING AND ASSESSMENT 2020; 192:194. [PMID: 32086640 DOI: 10.1007/s10661-020-8147-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Accepted: 02/05/2020] [Indexed: 06/10/2023]
Abstract
Since early studies about aquatic ecology, it has been found that changes in environmental conditions alter aquatic insect communities. Based on this, the combined study of environmental conditions and aquatic insect communities has become an important tool to monitor and manage freshwater systems. However, there is no consensus about which environmental predictors and facets of diversity are more useful for environmental monitoring. The objective of this work was to conduct a scientometric analysis to identify the main environmental predictors and biological groups used to monitor and manage lotic freshwater systems. We conducted a scientometric study on the Web of Science platform using the following words: stream, river, aquatic insect, Ephemeroptera, Plecoptera, Trichoptera, Odonata, Heteroptera, Chironomidae, bioindicator, environmental change, anthropic, and land use. Although most of the environmental predictors employed are local, intrinsic of freshwater systems using local environmental and associated landscape variables is a better strategy to predict aquatic insect communities. The facets of diversity most used are composition and richness of species and genera, which are not efficient at measuring the loss of ecosystem services and extinction of phylogenetic lineages. Although very important, these functional and phylogenetic facets are poorly explored for this purpose. Even though tropical regions are the most diverse globally and are experiencing major losses of native vegetation, these ecosystems are the least studied, a knowledge gap that needs addressing to better understand the effect of anthropogenic activities on the diversity of aquatic insects.
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Affiliation(s)
- Leandro Schlemmer Brasil
- Programa de Pós-Graduação em Zoologia, UFPA/MPEG, Instituto de Ciências Biológicas, Universidade Federal do Pará, Rua Augusto Corrêa, N° 1, Bairro Guamá, Belém, Pará, CEP 66075-110, Brazil.
| | - Ana Luiza-Andrade
- Programa de Pós-Graduação em Zoologia, UFPA/MPEG, Instituto de Ciências Biológicas, Universidade Federal do Pará, Rua Augusto Corrêa, N° 1, Bairro Guamá, Belém, Pará, CEP 66075-110, Brazil
| | - Lenize Batista Calvão
- Programa de Pós-Graduação em Zoologia, UFPA/MPEG, Instituto de Ciências Biológicas, Universidade Federal do Pará, Rua Augusto Corrêa, N° 1, Bairro Guamá, Belém, Pará, CEP 66075-110, Brazil
- Programa de Pós-Graduação em Ecologia-PPGECO, Instituto de Ciências Biológicas, Universidade Federal do Pará, Rua Augusto Corrêa, N° 1, Bairro Guamá, Belém, Pará, CEP 66075-110, Brazil
| | - Karina Dias-Silva
- campus de Altamira, Programa de Pós-Graduação em Biodiversidade e Conservação-PPGBC, Faculdade de Ciências Biológicas, Universidade Federal do Pará-UFPA, Altamira, Pará, Brazil
| | - Ana Paula Justino Faria
- Programa de Pós-Graduação em Ecologia-PPGECO, Instituto de Ciências Biológicas, Universidade Federal do Pará, Rua Augusto Corrêa, N° 1, Bairro Guamá, Belém, Pará, CEP 66075-110, Brazil
| | - Yulie Shimano
- Instituto Nacional de Pesquisa do Pantanal, campus avançado do Museu Paraense Emílio Goeldi, INPP/MPEG, Av. Fernando Corrêa da Costa, n° 2367-,Bairro Boa Esperança, Cuiabá, Mato Grosso, CEP 78060-900, Brazil
| | - José Max Barbosa Oliveira-Junior
- Programa de Pós-Graduação em Ecologia-PPGECO, Instituto de Ciências Biológicas, Universidade Federal do Pará, Rua Augusto Corrêa, N° 1, Bairro Guamá, Belém, Pará, CEP 66075-110, Brazil
- Instituto de Ciências e Tecnologia das Águas (ICTA), Rua Vera Paz, s/n (Unidade Tapajós) Bairro, Universidade Federal do Oeste do Pará (UFOPA), Av. Fernando Corrêa da Costa, n° 2367-, Bairro Boa Esperança, Salé, Santarém, 68040-255, Brazil
| | - Mylena Neves Cardoso
- Programa de Pós-Graduação em Zoologia, UFPA/MPEG, Instituto de Ciências Biológicas, Universidade Federal do Pará, Rua Augusto Corrêa, N° 1, Bairro Guamá, Belém, Pará, CEP 66075-110, Brazil
| | - Leandro Juen
- Programa de Pós-Graduação em Zoologia, UFPA/MPEG, Instituto de Ciências Biológicas, Universidade Federal do Pará, Rua Augusto Corrêa, N° 1, Bairro Guamá, Belém, Pará, CEP 66075-110, Brazil
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Hamilton AT, Schäfer RB, Pyne MI, Chessman B, Kakouie K, Boersma KS, Verdonschot PF, Verdonschot RC, Mims M, Khamis K, Bierwagen B, Stamp J. Limitations of trait-based approaches for stressor assessment: The case of freshwater invertebrates and climate drivers. GLOBAL CHANGE BIOLOGY 2020; 26:364-379. [PMID: 31553112 PMCID: PMC10839858 DOI: 10.1111/gcb.14846] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 08/29/2019] [Accepted: 09/09/2019] [Indexed: 06/10/2023]
Abstract
The appeal of trait-based approaches for assessing environmental vulnerabilities arises from the potential insight they provide into the mechanisms underlying the changes in populations and community structure. Traits can provide ecologically based explanations for observed responses to environmental changes, along with predictive power gained by developing relationships between traits and environmental variables. Despite these potential benefits, questions remain regarding the utility and limitations of these approaches, which we explore focusing on the following questions: (a) How reliable are predictions of biotic responses to changing conditions based on single trait-environment relationships? (b) What factors constrain detection of single trait-environment relationships, and how can they be addressed? (c) Can we use information on meta-community processes to reveal conditions when assumptions underlying trait-based studies are not met? We address these questions by reviewing published literature on aquatic invertebrate communities from stream ecosystems. Our findings help to define factors that influence the successful application of trait-based approaches in addressing the complex, multifaceted effects of changing climate conditions on hydrologic and thermal regimes in stream ecosystems. Key conclusions are that observed relationships between traits and environmental stressors are often inconsistent with predefined hypotheses derived from current trait-based thinking, particularly related to single trait-environment relationships. Factors that can influence findings of trait-based assessments include intercorrelations of among traits and among environmental variables, spatial scale, strength of biotic interactions, intensity of habitat disturbance, degree of abiotic stress, and methods of trait characterization. Several recommendations are made for practice and further study to address these concerns, including using phylogenetic relatedness to address intercorrelation. With proper consideration of these issues, trait-based assessment of organismal vulnerability to environmental changes can become a useful tool to conserve threatened populations into the future.
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Affiliation(s)
| | - Ralf B. Schäfer
- iES Landau, Institute for Environmental Sciences, University Koblenz-Landau Fortstrasse 7 76829 Landau, Germany
| | | | - Bruce Chessman
- Centre for Ecosystem Science, School of Biological, Earth and Environmental Sciences, UNSW Sydney, NSW, Australia
| | - Karan Kakouie
- Department of Ecosystem Research, Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany
| | - Kate S. Boersma
- Department of Biology, University of San Diego, San Diego, CA, USA
| | - Piet F.M. Verdonschot
- Wageningen Environmental Research, Wageningen University and Research, Wageningen, The Netherlands
- Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Amsterdam, The Netherlands
| | - Ralf C.M. Verdonschot
- Wageningen Environmental Research, Wageningen University and Research, Wageningen, The Netherlands
| | - Meryl Mims
- Department of Biological Sciences, Virginia Tech, Blacksburg, VA, USA
| | - Kieran Khamis
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Britta Bierwagen
- U.S. Environmental Protection Agency, Office of Research and Development, National Center for Environmental Assessment, Washington, DC, USA
| | - Jen Stamp
- Tetra Tech Center for Ecological Sciences, Montpelier, VT, USA
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Characteristics, Main Impacts, and Stewardship of Natural and Artificial Freshwater Environments: Consequences for Biodiversity Conservation. WATER 2020. [DOI: 10.3390/w12010260] [Citation(s) in RCA: 67] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
In this overview (introductory article to a special issue including 14 papers), we consider all main types of natural and artificial inland freshwater habitas (fwh). For each type, we identify the main biodiversity patterns and ecological features, human impacts on the system and environmental issues, and discuss ways to use this information to improve stewardship. Examples of selected key biodiversity/ecological features (habitat type): narrow endemics, sensitive (groundwater and GDEs); crenobionts, LIHRes (springs); unidirectional flow, nutrient spiraling (streams); naturally turbid, floodplains, large-bodied species (large rivers); depth-variation in benthic communities (lakes); endemism and diversity (ancient lakes); threatened, sensitive species (oxbow lakes, SWE); diverse, reduced littoral (reservoirs); cold-adapted species (Boreal and Arctic fwh); endemism, depauperate (Antarctic fwh); flood pulse, intermittent wetlands, biggest river basins (tropical fwh); variable hydrologic regime—periods of drying, flash floods (arid-climate fwh). Selected impacts: eutrophication and other pollution, hydrologic modifications, overexploitation, habitat destruction, invasive species, salinization. Climate change is a threat multiplier, and it is important to quantify resistance, resilience, and recovery to assess the strategic role of the different types of freshwater ecosystems and their value for biodiversity conservation. Effective conservation solutions are dependent on an understanding of connectivity between different freshwater ecosystems (including related terrestrial, coastal and marine systems).
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Wang J, Hu J, Tang T, Heino J, Jiang X, Li Z, Xie Z. Seasonal shifts in the assembly dynamics of benthic macroinvertebrate and diatom communities in a subtropical river. Ecol Evol 2020; 10:692-704. [PMID: 32015836 PMCID: PMC6988552 DOI: 10.1002/ece3.5904] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Revised: 10/10/2019] [Accepted: 11/18/2019] [Indexed: 11/15/2022] Open
Abstract
Identifying seasonal shifts in community assembly for multiple biological groups is important to help enhance our understanding of their ecological dynamics. However, such knowledge on lotic assemblages is still limited. In this study, we used biological traits and functional diversity indices in association with null model analyses to detect seasonal shifts in the community assembly mechanisms of lotic macroinvertebrates and diatoms in an unregulated subtropical river in China. We found that functional composition and functional diversity (FRic, FEve, FDis, MNN, and SDNN) showed seasonal variation for macroinvertebrate and diatom assemblages. Null models suggested that environmental filtering, competitive exclusion, and neutral process were all important community assembly mechanisms for both biological groups. However, environmental filtering had a stronger effect on spring macroinvertebrate assemblages than autumn assemblages, but the effect on diatom assemblages was the same in both seasons. Moreover, macroinvertebrate and diatom assemblages were shaped by different environmental factors. Macroinvertebrates were filtered mainly by substrate types, velocity, and CODMn, while diatoms were mainly shaped by altitude, substrate types, and water quality. Therefore, our study showed (a) that different biological assemblages in a river system presented similarities and differences in community assembly mechanisms, (b) that multiple processes play important roles in maintaining benthic community structure, and (c) that these patterns and underlying mechanisms are seasonally variable. Thus, we highlight the importance of exploring the community assembly mechanisms of multiple biological groups, especially in different seasons, as this is crucial to improve the understanding of river community changes and their responses to environmental degradation.
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Affiliation(s)
- Jun Wang
- State Key Laboratory of Freshwater Ecology and BiotechnologyInstitute of HydrobiologyChinese Academy of SciencesWuhanChina
| | - Jiancheng Hu
- State Key Laboratory of Freshwater Ecology and BiotechnologyInstitute of HydrobiologyChinese Academy of SciencesWuhanChina
- University of Chinese Academy of SciencesBeijingChina
| | - Tao Tang
- State Key Laboratory of Freshwater Ecology and BiotechnologyInstitute of HydrobiologyChinese Academy of SciencesWuhanChina
| | - Jani Heino
- Freshwater CentreFinnish Environment InstituteOuluFinland
| | - Xiaoming Jiang
- State Key Laboratory of Freshwater Ecology and BiotechnologyInstitute of HydrobiologyChinese Academy of SciencesWuhanChina
| | - Zhengfei Li
- State Key Laboratory of Freshwater Ecology and BiotechnologyInstitute of HydrobiologyChinese Academy of SciencesWuhanChina
| | - Zhicai Xie
- State Key Laboratory of Freshwater Ecology and BiotechnologyInstitute of HydrobiologyChinese Academy of SciencesWuhanChina
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29
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Lansac-Tôha FM, Heino J, Quirino BA, Moresco GA, Peláez O, Meira BR, Rodrigues LC, Jati S, Lansac-Tôha FA, Velho LFM. Differently dispersing organism groups show contrasting beta diversity patterns in a dammed subtropical river basin. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 691:1271-1281. [PMID: 31466207 DOI: 10.1016/j.scitotenv.2019.07.236] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 06/06/2019] [Accepted: 07/15/2019] [Indexed: 06/10/2023]
Abstract
Although it is widely known that dams can have large impacts on the environmental and biological characteristics of downstream rivers, there is a substantial lack of studies focusing on which ecological processes cause longitudinal changes in biological communities downstream of reservoirs. We investigated longitudinal patterns in the total beta diversity and its replacement and richness difference components for actively (fish) and passively (phytoplankton) dispersing biological groups. Our results, obtained from a 230 km sampling stretch, demonstrated the key role played by tributaries in the downstream direction from main river impoundment, which influenced local environmental conditions and beta diversity patterns of each biological group. Both replacement and richness difference contributed to high values of total beta diversity for fish (average = 0.77) and phytoplankton (average = 0.79), but their relative importance was more associated with the replacement component for both biological groups (average = 0.45 and 0.52, respectively). Moreover, we observed clear differences between fish and phytoplankton in beta diversity patterns operating at small and broad scales, as well as in the mechanisms driving each beta diversity component. Directional dispersal-related processes and environmental filtering played a major role in shaping total beta diversity and its components for fish, while temporal factors explained considerable parts of phytoplankton beta diversity. Our findings contributed to understanding of tributary-induced heterogeneity and highlight the importance of dam-free stretches of rivers for preserving the integrity of dammed river basins.
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Affiliation(s)
- Fernando M Lansac-Tôha
- Universidade Estadual de Maringá (UEM), DBI/PEA/NUPÉLIA, Av. Colombo, 5790, CEP: 87.020-900 Maringá, PR, Brazil.
| | - Jani Heino
- Finnish Environment Institute (SYKE), Freshwater Centre, Paavo Havaksen Tie 3, Oulu, Finland
| | - Bárbara A Quirino
- Universidade Estadual de Maringá (UEM), DBI/PEA/NUPÉLIA, Av. Colombo, 5790, CEP: 87.020-900 Maringá, PR, Brazil
| | - Geovani A Moresco
- Universidade Estadual de Maringá (UEM), DBI/PEA/NUPÉLIA, Av. Colombo, 5790, CEP: 87.020-900 Maringá, PR, Brazil
| | - Oscar Peláez
- Universidade Estadual de Maringá (UEM), DBI/PEA/NUPÉLIA, Av. Colombo, 5790, CEP: 87.020-900 Maringá, PR, Brazil
| | - Bianca R Meira
- Universidade Estadual de Maringá (UEM), DBI/PEA/NUPÉLIA, Av. Colombo, 5790, CEP: 87.020-900 Maringá, PR, Brazil
| | - Luzia C Rodrigues
- Universidade Estadual de Maringá (UEM), DBI/PEA/NUPÉLIA, Av. Colombo, 5790, CEP: 87.020-900 Maringá, PR, Brazil
| | - Susicley Jati
- Universidade Estadual de Maringá (UEM), DBI/PEA/NUPÉLIA, Av. Colombo, 5790, CEP: 87.020-900 Maringá, PR, Brazil
| | - Fábio A Lansac-Tôha
- Universidade Estadual de Maringá (UEM), DBI/PEA/NUPÉLIA, Av. Colombo, 5790, CEP: 87.020-900 Maringá, PR, Brazil
| | - Luiz Felipe M Velho
- Universidade Estadual de Maringá (UEM), DBI/PEA/NUPÉLIA, Av. Colombo, 5790, CEP: 87.020-900 Maringá, PR, Brazil; UniCesumar -PPGTL, Instituto Cesumar de Ciência Tecnologia e Inovação (ICETI), Av. Guedner, 1610, CEP: 87.050-390 Maringá, PR, Brazil
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González‐Trujillo JD, Donato‐Rondon JC, Muñoz I, Sabater S. Historical processes constrain metacommunity structure by shaping different pools of invertebrate taxa within the Orinoco basin. DIVERS DISTRIB 2019. [DOI: 10.1111/ddi.12996] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Affiliation(s)
- Juan David González‐Trujillo
- Departamento de Biología Universidad Nacional de Colombia Bogotá Colombia
- Catalan Institute for Water Research (ICRA) Girona Spain
- Universitat de Girona Girona Spain
| | | | - Isabel Muñoz
- Department of Ecology University of Barcelona Barcelona Spain
| | - Sergi Sabater
- Catalan Institute for Water Research (ICRA) Girona Spain
- Universitat de Girona Girona Spain
- Faculty of Sciences Institute of Aquatic Ecology Universitat de Girona Girona Spain
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31
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Simons AL, Mazor R, Theroux S. Using co-occurrence network topology in assessing ecological stress in benthic macroinvertebrate communities. Ecol Evol 2019; 9:12789-12801. [PMID: 31788214 PMCID: PMC6875672 DOI: 10.1002/ece3.5751] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 09/20/2019] [Accepted: 09/23/2019] [Indexed: 11/10/2022] Open
Abstract
Ecological monitoring of streams has often focused on assessing the biotic integrity of individual benthic macroinvertebrate (BMI) communities through local measures of diversity, such as taxonomic or functional richness. However, as individual BMI communities are frequently linked by a variety of ecological processes at a regional scale, there is a need to assess biotic integrity of groups of communities at the scale of watersheds. Using 4,619 sampled communities of streambed BMIs, we investigate this question using co-occurrence networks generated from groups of communities selected within California watersheds under different levels of stress due to upstream land use. Building on a number of arguments in theoretical ecology and network theory, we propose a framework for the assessment of the biotic integrity of watershed-scale groupings of BMI communities using measures of their co-occurrence network topology. We found significant correlations between stress, as described by a mean measure of upstream land use within a watershed, and topological measures of co-occurrence networks such as network size (r = -.81, p < 10-4), connectance (r = .31, p < 10-4), mean co-occurrence strength (r = .25, p < 10-4), degree heterogeneity (r = -.10, p < 10-4), and modularity (r = .11, p < 10-4). Using these five topological measures, we constructed a linear model of biotic integrity, here a composite of taxonomic and functional diversity known as the California Stream Condition Index, of groups of BMI communities within a watershed. This model can account for 66% of among-watershed variation in the mean biotic integrity of communities. These observations imply a role for co-occurrence networks in assessing the current status of biotic integrity for BMI communities, as well as their potential use in assessing other ecological communities.
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Affiliation(s)
- Ariel Levi Simons
- Dornsife College of Letters, Arts and SciencesUniversity of Southern CaliforniaLos AngelesCalifornia
| | - Raphael Mazor
- Southern California Coastal Water Research ProjectCosta MesaCalifornia
| | - Susanna Theroux
- Southern California Coastal Water Research ProjectCosta MesaCalifornia
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Fu H, Yuan G, Jeppesen E, Ge D, Li W, Zou D, Huang Z, Wu A, Liu Q. Local and regional drivers of turnover and nestedness components of species and functional beta diversity in lake macrophyte communities in China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 687:206-217. [PMID: 31207511 DOI: 10.1016/j.scitotenv.2019.06.092] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Revised: 06/04/2019] [Accepted: 06/06/2019] [Indexed: 06/09/2023]
Abstract
Beta diversity describes the variation in species composition between sites and is often influenced by both local and regional processes. Partitioning beta diversity into turnover (species replacement between sites) and nestedness (richness difference between sites) components may enhance our understanding of the mechanisms behind the local and regional drivers determining species composition across spatial scales. We sampled macrophyte communities in 24 lakes in two regions (Yangtze River basin and Yunnan-Guizhou plateau) of China covering broad climate and nutrient gradients. Based on both species and functional approaches, we calculated multiple-site beta diversity using the Sørensen dissimilarity index and partitioned it into turnover and nestedness coefficients crossed with two nested spatial scales: among depths within transects (transect scale) and among transects within lakes (lake scale). The overall species beta diversity and functional beta diversity (i.e. Sørensen coefficient) were significantly lower and thus more homogeneous at lake scale. Across spatial scales, species beta diversity was mainly explained by turnover patterns (56-61%) and functional beta diversity primarily by nestedness patterns (58-65%). Both local and regional drivers contributed to structuring species and functional beta diversity patterns, largely through changes in species turnover and functional nestedness, respectively. Overall, we observed a significant increase in species beta diversity and its turnover component while a decreasing trend in functional beta diversity and its nestedness component at high altitude. Our results further emphasized that the species beta diversity and its turnover component decreased at high total phosphorus concentration (TP) across the two spatial scales, while the functional beta diversity and its nestedness component decreased at high TP at the transect scale. We conclude that understanding of the relative role of local and regional drivers in determining macrophyte diversity patterns may help managers to select the most appropriate conservation strategies for preservation of biodiversity varying with the scale in focus.
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Affiliation(s)
- Hui Fu
- Ecology Department, College of Bioscience & Biotechnology, Hunan Provincial Key Laboratory of Rural Ecosystem Health in Dongting Lake Area, Hunan Agricultural University, Changsha 410128, PR China; Jiangxi Institute of Water Sciences, Beijing East Road 1038, Nanchang 330029, PR China.
| | - Guixiang Yuan
- Ecology Department, College of Bioscience & Biotechnology, Hunan Provincial Key Laboratory of Rural Ecosystem Health in Dongting Lake Area, Hunan Agricultural University, Changsha 410128, PR China; Jiangxi Institute of Water Sciences, Beijing East Road 1038, Nanchang 330029, PR China
| | - Erik Jeppesen
- Department of Bioscience, Aarhus University, Vejlsøvej 25, 8600 Silkeborg, Denmark; Sino-Danish Centre for Education and Research (SDC), University of Chinese Academy of Sciences, Beijing, PR China
| | - Dabing Ge
- Ecology Department, College of Bioscience & Biotechnology, Hunan Provincial Key Laboratory of Rural Ecosystem Health in Dongting Lake Area, Hunan Agricultural University, Changsha 410128, PR China
| | - Wei Li
- Research Institute of Ecology & Environmental Sciences, Nanchang Institute of Technology, Nanchang 330099, PR China
| | - Dongsheng Zou
- Ecology Department, College of Bioscience & Biotechnology, Hunan Provincial Key Laboratory of Rural Ecosystem Health in Dongting Lake Area, Hunan Agricultural University, Changsha 410128, PR China
| | - Zhenrong Huang
- Key Laboratory of Agro-ecological Processes in Subtropical Regions, Changsha Research Station for Agricultural and Environmental Monitoring, Institute of Subtropical Agriculture, Graduate University of Chinese Academy of Sciences, Chinese Academy of Sciences, Hunan 410125, PR China
| | - Aiping Wu
- Ecology Department, College of Bioscience & Biotechnology, Hunan Provincial Key Laboratory of Rural Ecosystem Health in Dongting Lake Area, Hunan Agricultural University, Changsha 410128, PR China
| | - Qiaolin Liu
- Ecology Department, College of Bioscience & Biotechnology, Hunan Provincial Key Laboratory of Rural Ecosystem Health in Dongting Lake Area, Hunan Agricultural University, Changsha 410128, PR China
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Environmental factors and river network position allow prediction of benthic community assemblies: A model of nematode metacommunities. Sci Rep 2019; 9:14716. [PMID: 31605024 PMCID: PMC6789110 DOI: 10.1038/s41598-019-51245-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Accepted: 09/27/2019] [Indexed: 11/09/2022] Open
Abstract
The field of metacommunity studies is growing rapidly, including recent applications to river networks. Most of these studies have targeted a single river network but whether their findings are relevant to other river systems is unknown. This study investigated the influence of environmental, spatial and temporal parameters on the community structure of nematodes in the river networks of the Elbe and Rhine. We asked whether the variance in community structure was better explained by spatial variables representing the watercourse than by overland distances. After determining the patterns in the Elbe river network, we tested whether they also explained the Rhine data. The Elbe data were evaluated using a boosted regression tree analysis. The predictive ability of the model was then assessed using the Rhine data. In addition to strong temporal dynamics, environmental factors were more important than spatial factors in structuring riverine nematode communities. Community structure was more strongly influenced by watercourse than by Euclidean distances. Application of the model's predictions to the Rhine data correlated significantly with field observations. Our model shows that the consequences of changes in environmental factors or habitat connectivity for aquatic communities across different river networks are quantifiable.
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Heer H, Streib L, Kattwinkel M, Schäfer RB, Ruzika S. Optimisation Model of Dispersal Simulations on a Dendritic Habitat Network. Sci Rep 2019; 9:8202. [PMID: 31160777 PMCID: PMC6547651 DOI: 10.1038/s41598-019-44716-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Accepted: 05/22/2019] [Indexed: 11/26/2022] Open
Abstract
To predict and mitigate biodiversity loss, a better understanding of species distribution and reliable dispersal models are required. A promising approach in dispersal simulation is the method of spatially explicit graph-based analysis. While graph theory is strongly connected to the field of optimisation in a variety of disciplines, the potential of optimisation has not yet been exploited in dispersal models. We introduce an optimisation model built on a graph-based dispersal simulation of an aquatic invertebrate species with a terrestrial life stage. The model simulates a directed dispersal process and investigates the fastest route to colonise predefined vacant habitat patches. The optimisation model run-time is in general an order of magnitude faster than the underlying simulation and provides the minimum time until the considered habitat patches are colonised under the given landscape structure. These results can then be used to estimate how fast newly formed habitat patches can be reached and colonised. Our model can in principle be adapted to other simulation models and can thus be seen as a pioneer of a new set of models that may support landscape conservation and restoration.
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Affiliation(s)
- Henriette Heer
- Institute for Environmental Sciences, Department of Quantitative Landscape Ecology, University Koblenz-Landau, Landau, Germany.
| | - Lucas Streib
- Institute for Environmental Sciences, Department of Quantitative Landscape Ecology, University Koblenz-Landau, Landau, Germany
| | - Mira Kattwinkel
- Institute for Environmental Sciences, Department of Quantitative Landscape Ecology, University Koblenz-Landau, Landau, Germany
| | - Ralf B Schäfer
- Institute for Environmental Sciences, Department of Quantitative Landscape Ecology, University Koblenz-Landau, Landau, Germany
| | - Stefan Ruzika
- Department of Mathematics, University of Kaiserslautern, Kaiserslautern, Germany
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35
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Simons AL, Mazor R, Stein ED, Nuzhdin S. Using alpha, beta, and zeta diversity in describing the health of stream-based benthic macroinvertebrate communities. ECOLOGICAL APPLICATIONS : A PUBLICATION OF THE ECOLOGICAL SOCIETY OF AMERICA 2019; 29:e01896. [PMID: 31051052 DOI: 10.1002/eap.1896] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Revised: 02/08/2019] [Accepted: 02/25/2019] [Indexed: 06/09/2023]
Abstract
Ecological monitoring of streams has frequently focused on measures describing the taxonomic, and sometimes functional, α diversity of benthic macroinvertebrates (BMIs) within a single sampled community. However, as many ecological processes effectively link BMI stream communities there is a need to describe groups of communities using measures of regional diversity. Here we demonstrate a role for incorporating both a traditional pairwise measure of community turnover, β diversity, in assessing community health as well as ζ diversity, a more generalized framework for describing similarity between multiple communities. Using 4,395 samples of BMI stream communities in California, we constructed a model using measures of α, β, and ζ diversity, which accounted for 71.7% of among-watershed variation in the mean health of communities, as described by the California Streams Condition Index (CSCI). We also investigated the use of ζ diversity in assessing models of stochastic vs. niche assembly across communities of BMIs within watersheds, with the niche assembly model found to be the likelier of the two.
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Affiliation(s)
- Ariel Levi Simons
- Dornsife College of Letters, Arts and Sciences, University of Southern California, Los Angeles, California, 90089-2910, USA
| | - Raphael Mazor
- Southern California Coastal Water Research Project, 3535 Harbor Blvd., Suite 110, Costa Mesa, California, 92626, USA
| | - Eric D Stein
- Southern California Coastal Water Research Project, 3535 Harbor Blvd., Suite 110, Costa Mesa, California, 92626, USA
| | - Sergey Nuzhdin
- Dornsife College of Letters, Arts and Sciences, University of Southern California, Los Angeles, California, 90089-2910, USA
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36
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Gao Y, Chen Y, Xiong W, Li S, Zhan A. Distribution patterns of dinoflagellate communities along the Songhua River. PeerJ 2019; 7:e6733. [PMID: 30993050 PMCID: PMC6461062 DOI: 10.7717/peerj.6733] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Accepted: 03/07/2019] [Indexed: 12/04/2022] Open
Abstract
Background Dinoflagellates have the potential to pose severe ecological and economic damages to aquatic ecosystems. It is therefore largely needed to understand the causes and consequences of distribution patterns of dinoflagellate communities in order to manage potential environmental problems. However, a majority of studies have focused on marine ecosystems, while the geographical distribution patterns of dinoflagellate communities and associated determinants in freshwater ecosystems remain unexplored, particularly in running water ecosystems such as rivers and streams. Methods Here we utilized multiple linear regression analysis and combined information on species composition recovered by high-throughput sequencing and spatial and environmental variables to analyze the distribution patterns of dinoflagellate communities along the Songhua River. Results After high-throughput sequencing, a total of 490 operational taxonomic units (OTUs) were assigned to dinoflagellates, covering seven orders, 13 families and 22 genera. Although the sample sites were grouped into three distinctive clusters with significant difference (p < 0.05) in environmental variables, OTUs-based dinoflagellate communities among the three clusters showed no significant difference (p > 0.05). Among all 24 environmental factors, two environmental variables, including NO3-N and total dissolved solids (TDS), were selected as the significantly influential factors (p < 0.05) on the distribution patterns of dinoflagellate communities based on forward selection. The redundancy analysis (RDA) model showed that only a small proportion of community variation (6.1%) could be explained by both environmental (NO3-N and TDS) and dispersal predictors (watercourse distance) along the River. Variance partitioning revealed a larger contribution of local environmental factors (5.85%) than dispersal (0.50%) to the total variation of dinoflagellate communities. Discussion Our findings indicated that in addition to the two quantifiable processes in this study (species sorting and dispersal), more unquantifiable stochastic processes such as temporal extinction and colonization events due to rainfall may be responsible for the observed geographical distribution of the dinoflagellate community along the Songhua River. Results obtained in this study suggested that deeper investigations covering different seasons are needed to understand the causes and consequences of geographical distribution patterns of dinoflagellate biodiversity in river ecosystems.
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Affiliation(s)
- Yangchun Gao
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, China
| | - Yiyong Chen
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, China
| | - Wei Xiong
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China
| | - Shiguo Li
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, China
| | - Aibin Zhan
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, China
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37
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Li Z, Wang J, Liu Z, Meng X, Heino J, Jiang X, Xiong X, Jiang X, Xie Z. Different responses of taxonomic and functional structures of stream macroinvertebrate communities to local stressors and regional factors in a subtropical biodiversity hotspot. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 655:1288-1300. [PMID: 30577121 DOI: 10.1016/j.scitotenv.2018.11.222] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2018] [Revised: 11/15/2018] [Accepted: 11/15/2018] [Indexed: 06/09/2023]
Abstract
Examining the relative contribution of local environmental stressors and regional factors in structuring biological communities is essential for biodiversity conservation and environmental assessment, yet their relative roles for different community characterizations remain elusive. Here, we examined the responses of taxonomic and functional structures of stream macroinvertebrate communities to local and regional factors across a human-induced environmental gradient in the Han River Basin, one subtropical biodiversity hotspot in China. Our objectives were: 1) to examine the responses of traditional taxonomic measures and functional traits to anthropogenic disturbances; 2) to compare the relative importance of environmental versus spatial variables and catchment-scale versus reach-scale variables for the two community characterizations. We found that both species and trait compositions performed well in differentiating anthropogenic disturbances, indicating that both taxonomic and functional structures of macroinvertebrate communities were strongly altered by human activities. Particularly, some traits related to life history (e.g., voltinism), resilience and resistance (e.g., adult flying ability) are well suited for predicting changes of communities towards anthropogenic disturbances owing to their mechanistic relationship with environmental gradients. We found that environmental variables played more important roles than spatial effects in structuring both taxonomic and functional facets of macroinvertebrate communities. Environmental filtering was more important in determining functional than taxonomic structure, and the opposite was true for spatial effects. In terms of environmental variables, catchment land-uses played the primary role in determining taxonomic composition, whereas reach-scale variables related to local habitat heterogeneity were more influential for functional structure. Our study highlights the importance of employing metacommunity perspectives and different community characterizations in both theoretical and applied research. For stream bioassessment and management, we argue that the combination of taxonomic and functional characterizations of community should be implemented, as different facets of biological communities responded to different types of anthropogenic disturbances.
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Affiliation(s)
- Zhengfei Li
- The Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Jun Wang
- The Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
| | - Zhenyuan Liu
- The Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Xingliang Meng
- The Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
| | - Jani Heino
- Biodiversity Centre, Finnish Environment Institute, Paavo Havaksen Tie 3, P.O. Box 413, 90014 Oulu, Finland.
| | - Xuankong Jiang
- The Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Xiong Xiong
- The Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
| | - Xiaoming Jiang
- The Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; State Key Laboratory of Eco-hydraulic in Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048, China.
| | - Zhicai Xie
- The Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
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Wu W, Liu H. Disentangling protist communities identified from DNA and RNA surveys in the Pearl River-South China Sea Continuum during the wet and dry seasons. Mol Ecol 2018; 27:4627-4640. [DOI: 10.1111/mec.14867] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Revised: 08/12/2018] [Accepted: 09/07/2018] [Indexed: 01/08/2023]
Affiliation(s)
- Wenxue Wu
- School of Marine Sciences; Sun Yat-sen University; Zhuhai Guangdong China
- Division of Life Science; The Hong Kong University of Science and Technology; Kowloon, Hong Kong SAR China
| | - Hongbin Liu
- Division of Life Science; The Hong Kong University of Science and Technology; Kowloon, Hong Kong SAR China
- Department of Ocean Science; The Hong Kong University of Science and Technology; Kowloon, Hong Kong SAR China
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39
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Podani J, Ódor P, Fattorini S, Strona G, Heino J, Schmera D. Exploring multiple presence-absence data structures in ecology. Ecol Modell 2018. [DOI: 10.1016/j.ecolmodel.2018.05.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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40
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Tornero I, Boix D, Bagella S, Pinto-Cruz C, Caria MC, Belo A, Lumbreras A, Sala J, Compte J, Gascón S. Dispersal mode and spatial extent influence distance-decay patterns in pond metacommunities. PLoS One 2018; 13:e0203119. [PMID: 30153308 PMCID: PMC6112654 DOI: 10.1371/journal.pone.0203119] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Accepted: 08/10/2018] [Indexed: 11/18/2022] Open
Abstract
Assuming that dispersal modes or abilities can explain the different responses of organisms to geographic or environmental distances, the distance-decay relationship is a useful tool to evaluate the relative role of local environmental structuring versus regional control in community composition. Based on continuing the current theoretical framework on metacommunity dynamics and based on the predictive effect of distance on community similarity, we proposed a new framework that includes the effect of spatial extent. In addition, we tested the validity of our proposal by studying the community similarity among three biotic groups with different dispersal modes (macrofaunal active and passive dispersers and plants) from two pond networks, where one network had a small spatial extent, and the other network had an extent that was 4 times larger. Both pond networks have similar environmental variability. Overall, we found that environmental distance had larger effects than geographical distances in both pond networks. Moreover, our results suggested that species sorting is the main type of metacommunity dynamics shaping all biotic groups when the spatial extent is larger. In contrast, when the spatial extent is smaller, the observed distance-decay patterns suggested that different biotic groups were mainly governed by different metacommunity dynamics. While the distance-decay patterns of active dispersers better fit the trend that was expected when mass effects govern a metacommunity, passive dispersers showed a pattern that was expected when species sorting prevails. Finally, in the case of plants, it is difficult to associate their distance-decay patterns with one type of metacommunity dynamics.
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Affiliation(s)
- Irene Tornero
- GRECO, Institute of Aquatic Ecology, University of Girona, Girona, Spain
- * E-mail:
| | - Dani Boix
- GRECO, Institute of Aquatic Ecology, University of Girona, Girona, Spain
| | - Simonetta Bagella
- Department of Chemistry and Pharmacy, University of Sassari, Sassari, Italy
| | - Carla Pinto-Cruz
- Departamento de Biologia, Escola de Ciências e Tecnologia, ICAAM - Instituto Ciências Agrárias e Ambientais Mediterrânicas, Universidade de Évora, Évora, Portugal
| | | | - Anabela Belo
- Departamento de Biologia, Escola de Ciências e Tecnologia, ICAAM - Instituto Ciências Agrárias e Ambientais Mediterrânicas, Universidade de Évora, Évora, Portugal
| | - Ana Lumbreras
- ICAAM - Instituto Ciências Agrárias e Ambientais Mediterrânicas, Universidade de Évora, Évora, Portugal
| | - Jordi Sala
- GRECO, Institute of Aquatic Ecology, University of Girona, Girona, Spain
| | - Jordi Compte
- GRECO, Institute of Aquatic Ecology, University of Girona, Girona, Spain
| | - Stéphanie Gascón
- GRECO, Institute of Aquatic Ecology, University of Girona, Girona, Spain
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41
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Clappe S, Dray S, Peres-Neto PR. Beyond neutrality: disentangling the effects of species sorting and spurious correlations in community analysis. Ecology 2018; 99:1737-1747. [DOI: 10.1002/ecy.2376] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Revised: 03/12/2018] [Accepted: 03/21/2018] [Indexed: 11/11/2022]
Affiliation(s)
- Sylvie Clappe
- Université de Lyon; F-69000 Lyon France
- CNRS; UMR 5558; Laboratoire de Biométrie et Biologie Evolutive; F-69622 Villeurbanne France
| | - Stéphane Dray
- Université de Lyon; F-69000 Lyon France
- CNRS; UMR 5558; Laboratoire de Biométrie et Biologie Evolutive; F-69622 Villeurbanne France
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42
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Grönroos M, Parajuli A, Laitinen OH, Roslund MI, Vari HK, Hyöty H, Puhakka R, Sinkkonen A. Short-term direct contact with soil and plant materials leads to an immediate increase in diversity of skin microbiota. Microbiologyopen 2018; 8:e00645. [PMID: 29808965 PMCID: PMC6436432 DOI: 10.1002/mbo3.645] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Revised: 03/23/2018] [Accepted: 03/27/2018] [Indexed: 12/14/2022] Open
Abstract
Immune‐mediated diseases have increased during the last decades in urban environments. The hygiene hypothesis suggests that increased hygiene level and reduced contacts with natural biodiversity are related to the increase in immune‐mediated diseases. We tested whether short‐time contact with microbiologically diverse nature‐based materials immediately change bacterial diversity on human skin. We tested direct skin contact, as two volunteers rubbed their hands with sixteen soil and plant based materials, and an exposure via fabric packets filled with moss material. Skin swabs were taken before and after both exposures. Next‐generation sequencing showed that exposures increased, at least temporarily, the total diversity of skin microbiota and the diversity of Acidobacteria, Actinobacteria, Bacteroidetes, Proteobacteria and Alpha‐, Beta‐ and Gammaproteobacteria suggesting that contact with nature‐based materials modify skin microbiome and increase skin microbial diversity. Until now, approaches to cure or prevent immune system disorders using microbe‐based treatments have been limited to use of a few microbial species. We propose that nature‐based materials with high natural diversity, such as the materials tested here, might be more effective in modifying human skin microbiome, and eventually, in reducing immune system disorders. Future studies should investigate how long‐term changes in skin microbiota are achieved and if the exposure induces beneficial changes in the immune system markers.
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Affiliation(s)
- Mira Grönroos
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Lahti, Finland
| | - Anirudra Parajuli
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Lahti, Finland
| | - Olli H Laitinen
- Department of Virology, School of Medicine, University of Tampere, Tampere, Finland
| | - Marja I Roslund
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Lahti, Finland
| | - Heli K Vari
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Lahti, Finland
| | - Heikki Hyöty
- Department of Virology, School of Medicine, University of Tampere, Tampere, Finland.,Fimlab Laboratories, Pirkanmaa Hospital District, Tampere, Finland
| | - Riikka Puhakka
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Lahti, Finland
| | - Aki Sinkkonen
- Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, Lahti, Finland
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43
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Corte GN, Gonçalves-Souza T, Checon HH, Siegle E, Coleman RA, Amaral ACZ. When time affects space: Dispersal ability and extreme weather events determine metacommunity organization in marine sediments. MARINE ENVIRONMENTAL RESEARCH 2018; 136:139-152. [PMID: 29510875 DOI: 10.1016/j.marenvres.2018.02.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Revised: 02/03/2018] [Accepted: 02/11/2018] [Indexed: 06/08/2023]
Abstract
Community ecology has traditionally assumed that the distribution of species is mainly influenced by environmental processes. There is, however, growing evidence that environmental (habitat characteristics and biotic interactions) and spatial processes (factors that affect a local assemblage regardless of environmental conditions - typically related to dispersal and movement of species) interactively shape biological assemblages. A metacommunity, which is a set of local assemblages connected by dispersal of individuals, is spatial in nature and can be used as a straightforward approach for investigating the interactive and independent effects of both environmental and spatial processes. Here, we examined (i) how environmental and spatial processes affect the metacommunity organization of marine macroinvertebrates inhabiting the intertidal sediments of a biodiverse coastal ecosystem; (ii) whether the influence of these processes is constant through time or is affected by extreme weather events (storms); and (iii) whether the relative importance of these processes depends on the dispersal abilities of organisms. We found that macrobenthic assemblages are influenced by each of environmental and spatial variables; however, spatial processes exerted a stronger role. We also found that this influence changes through time and is modified by storms. Moreover, we observed that the influence of environmental and spatial processes varies according to the dispersal capabilities of organisms. More effective dispersers (i.e., species with planktonic larvae) are more affected by spatial processes whereas environmental variables had a stronger effect on weaker dispersers (i.e. species with low motility in larval and adult stages). These findings highlight that accounting for spatial processes and differences in species life histories is essential to improve our understanding of species distribution and coexistence patterns in intertidal soft-sediments. Furthermore, it shows that storms modify the structure of coastal assemblages. Given that the influence of spatial and environmental processes is not consistent through time, it is of utmost importance that future studies replicate sampling over different periods so the influence of temporal and stochastic factors on macrobenthic metacommunities can be better understood.
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Affiliation(s)
- Guilherme N Corte
- Departamento de Biologia Animal, Instituto de Biologia, Universidade Estadual de Campinas (UNICAMP), Campinas, São Paulo, CEP 13083-862, Brazil; Departamento de Oceanografia Biológica, Instituto Oceanográfico, Universidade de São Paulo (USP), São Paulo, SP, Brazil.
| | - Thiago Gonçalves-Souza
- Phylogenetic and Functional Ecology Lab (ECOFFUN), Departament of Biology, Area of Ecology, Federal Rural University of Pernambuco, Recife, Pernambuco, Brazil
| | - Helio H Checon
- Departamento de Biologia Animal, Instituto de Biologia, Universidade Estadual de Campinas (UNICAMP), Campinas, São Paulo, CEP 13083-862, Brazil
| | - Eduardo Siegle
- Departamento de Oceanografia Física, Química e Geológica, Instituto Oceanográfico, Universidade de São Paulo (USP), São Paulo, SP, Brazil
| | - Ross A Coleman
- Coastal and Marine Ecosystems Group, School of Life & Environmental Sciences, The University of Sydney, Sydney, New South Wales, Australia
| | - A Cecília Z Amaral
- Departamento de Biologia Animal, Instituto de Biologia, Universidade Estadual de Campinas (UNICAMP), Campinas, São Paulo, CEP 13083-862, Brazil
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Alther R, Altermatt F. Fluvial network topology shapes communities of native and non-native amphipods. Ecosphere 2018. [DOI: 10.1002/ecs2.2102] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Affiliation(s)
- Roman Alther
- Department of Aquatic Ecology; Eawag, Swiss Federal Institute of Aquatic Science and Technology; CH-8600 Dübendorf Switzerland
- Department of Evolutionary Biology and Environmental Studies; University of Zurich; CH-8057 Zürich Switzerland
| | - Florian Altermatt
- Department of Aquatic Ecology; Eawag, Swiss Federal Institute of Aquatic Science and Technology; CH-8600 Dübendorf Switzerland
- Department of Evolutionary Biology and Environmental Studies; University of Zurich; CH-8057 Zürich Switzerland
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45
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Cai Y, Xu H, Vilmi A, Tolonen KT, Tang X, Qin B, Gong Z, Heino J. Relative roles of spatial processes, natural factors and anthropogenic stressors in structuring a lake macroinvertebrate metacommunity. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 601-602:1702-1711. [PMID: 28618660 DOI: 10.1016/j.scitotenv.2017.05.264] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Revised: 05/19/2017] [Accepted: 05/29/2017] [Indexed: 06/07/2023]
Abstract
Studies of aquatic metacommunities have so far been focused almost entirely on relatively isolated systems, such as a set of streams, lakes or ponds. Here, we aimed to quantify the relative importance of spatial processes, natural factors and anthropogenic stressors in structuring of a macroinvertebrate metacommunity within a large, highly-connected shallow lake system. The roles of different drivers were evaluated for the entire metacommunity, 10 trait-based deconstructed metacommunities and four common species by incorporating extensive sampling and a large number of abiotic explanatory variables. Contrary to our expectations, we found that variation in community structure among sites was mostly correlated to spatial and wind-wave variables rather than anthropogenic disturbance factors even though the lake presented strong environmental gradients associated with long-term human pressures. In addition, the relative importance of the three groups of drivers varied slightly among the deconstructed trait matrices (i.e. based on dispersal ability, feeding mode and degree of occurrence). Importantly, the distributions of the most common species showed significant and strong spatial autocorrelation, indicating the prominent role of high dispersal rate for their distributions. These findings suggest that the influences of high dispersal rates and natural disturbance may even override the roles of anthropogenic stressors in metacommunity organization in highly-connected aquatic systems. Hence, we strongly encourage that spatial processes and natural drivers are taken into account in the development of bioassessment approaches in highly-connected aquatic systems.
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Affiliation(s)
- Yongjiu Cai
- Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 73 East Beijing Road, Nanjing 210008, China
| | - Hao Xu
- Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 73 East Beijing Road, Nanjing 210008, China
| | - Annika Vilmi
- Finnish Environment Institute, Natural Environment Centre, Paavo Havaksen Tie 3, FI-90570 Oulu, Finland
| | - Kimmo T Tolonen
- Finnish Environment Institute, Natural Environment Centre, Paavo Havaksen Tie 3, FI-90570 Oulu, Finland; Department of Biological and Environmental Science, University of Jyväskylä, P.O. Box 35, FI-40014 Jyväskylä, Finland
| | - Xiangming Tang
- Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 73 East Beijing Road, Nanjing 210008, China
| | - Boqiang Qin
- Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 73 East Beijing Road, Nanjing 210008, China
| | - Zhijun Gong
- Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 73 East Beijing Road, Nanjing 210008, China.
| | - Jani Heino
- Finnish Environment Institute, Natural Environment Centre, Paavo Havaksen Tie 3, FI-90570 Oulu, Finland
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46
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Does Stream Size Really Explain Biodiversity Patterns in Lotic Systems? A Call for Mechanistic Explanations. DIVERSITY-BASEL 2017. [DOI: 10.3390/d9030026] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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47
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Xiong W, Ni P, Chen Y, Gao Y, Shan B, Zhan A. Zooplankton community structure along a pollution gradient at fine geographical scales in river ecosystems: The importance of species sorting over dispersal. Mol Ecol 2017; 26:4351-4360. [DOI: 10.1111/mec.14199] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2016] [Revised: 04/24/2017] [Accepted: 05/24/2017] [Indexed: 11/29/2022]
Affiliation(s)
- Wei Xiong
- Research Center for Eco-Environmental Sciences; Chinese Academy of Sciences; Beijing China
- University of Chinese Academy of Sciences; Chinese Academy of Sciences; Beijing China
| | - Ping Ni
- Research Center for Eco-Environmental Sciences; Chinese Academy of Sciences; Beijing China
- University of Chinese Academy of Sciences; Chinese Academy of Sciences; Beijing China
| | - Yiyong Chen
- Research Center for Eco-Environmental Sciences; Chinese Academy of Sciences; Beijing China
- University of Chinese Academy of Sciences; Chinese Academy of Sciences; Beijing China
| | - Yangchun Gao
- Research Center for Eco-Environmental Sciences; Chinese Academy of Sciences; Beijing China
- University of Chinese Academy of Sciences; Chinese Academy of Sciences; Beijing China
| | - Baoqing Shan
- Research Center for Eco-Environmental Sciences; Chinese Academy of Sciences; Beijing China
- University of Chinese Academy of Sciences; Chinese Academy of Sciences; Beijing China
| | - Aibin Zhan
- Research Center for Eco-Environmental Sciences; Chinese Academy of Sciences; Beijing China
- University of Chinese Academy of Sciences; Chinese Academy of Sciences; Beijing China
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48
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The underlying processes of a soil mite metacommunity on a small scale. PLoS One 2017; 12:e0176828. [PMID: 28481906 PMCID: PMC5421772 DOI: 10.1371/journal.pone.0176828] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Accepted: 04/18/2017] [Indexed: 11/19/2022] Open
Abstract
Metacommunity theory provides an understanding of how ecological processes regulate local community assemblies. However, few field studies have evaluated the underlying mechanisms of a metacommunity on a small scale through revealing the relative roles of spatial and environmental filtering in structuring local community composition. Based on a spatially explicit sampling design in 2012 and 2013, this study aims to evaluate the underlying processes of a soil mite metacommunity on a small spatial scale (50 m) in a temperate deciduous forest located at the Maoershan Ecosystem Research Station, Northeast China. Moran's eigenvector maps (MEMs) were used to model independent spatial variables. The relative importance of spatial (including trend variables, i.e., geographical coordinates, and broad- and fine-scale spatial variables) and environmental factors in driving the soil mite metacommunity was determined by variation partitioning. Mantel and partial Mantel tests and a redundancy analysis (RDA) were also used to identify the relative contributions of spatial and environmental variables. The results of variation partitioning suggested that the relatively large and significant variance was a result of spatial variables (including broad- and fine-scale spatial variables and trend), indicating the importance of dispersal limitation and autocorrelation processes. The significant contribution of environmental variables was detected in 2012 based on a partial Mantel test, and soil moisture and soil organic matter were especially important for the soil mite metacommunity composition in both years. The study suggested that the soil mite metacommunity was primarily regulated by dispersal limitation due to broad-scale and neutral biotic processes at a fine-scale and that environmental filtering might be of subordinate importance. In conclusion, a combination of metacommunity perspectives between neutral and species sorting theories was suggested to be important in the observed structure of the soil mite metacommunity at the studied small scale.
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Godoy BS, Queiroz LL, Lodi S, Oliveira LG. Environment and Spatial Influences on Aquatic Insect Communities in Cerrado Streams: the Relative Importance of Conductivity, Altitude, and Conservation Areas. NEOTROPICAL ENTOMOLOGY 2017; 46:151-158. [PMID: 27909952 DOI: 10.1007/s13744-016-0452-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Accepted: 10/13/2016] [Indexed: 06/06/2023]
Abstract
The aquatic insect community is an important element for stream functionality and diversity, but the effects of altitude and conservation areas on the aquatic insect community have been poorly explored in neotropical ecozone. The lack of studies about the relative importance of space and environment on community structure is another obstacle within aquatic insect ecology, which precludes the inclusion of these studies in more current frameworks, like the metacommunity dynamics. We evaluated the relationship between the aquatic insect community structure at 19 streams in the Brazilian Cerrado and spatial and environmental variables, namely geographical distance among sites, stream altitude, chemical variables, and environmental protection areas. We partitioned the variance explained by spatial and environmental components using a partial redundancy analysis. The environment exhibited a strong spatial structure for abundance and number of genera, increasing these community parameters with elevated water conductivity. Only community composition had a large unexplained portion of variance, with a small portion constrained by environmental (altitude and conductivity) and spatial factors. A relevant point in the result was the streams with high conductivity were located outside of the conservation areas. These results suggest that the relationship between number of genera and abundance with environmental conditions is always associated with spatial configuration of streams. Our study shows that altitude is an important determinant of community structure, as it exerts indirect influences, and electrical conductivity directly determines community composition, and that some national parks may be inefficient in maintaining the diversity of aquatic insects in the Cerrado region.
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Affiliation(s)
- B S Godoy
- Núcleo de Ciências Agrárias e Desenvolvimento Rural, Univ Federal do Pará, Campus Guamá. Rua Augusto Corrêa 01, Belém, PA, CEP: 66075-110, Brasil.
| | - L L Queiroz
- Núcleo de Ecologia de Insetos, Hexapoda, Goiânia, GO, Brasil
| | - S Lodi
- Depto de Ecologia, Univ Federal de Pará, Belém, PA, Brasil
| | - L G Oliveira
- Depto de Ecologia, Univ Federal de Goiás, Goiânia, GO, Brasil
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50
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Earthquake-Related Changes in Species Spatial Niche Overlaps in Spring Communities. Sci Rep 2017; 7:443. [PMID: 28348364 PMCID: PMC5428671 DOI: 10.1038/s41598-017-00592-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Accepted: 03/03/2017] [Indexed: 11/30/2022] Open
Abstract
Species interactions between stygobites (obligate groundwater organisms) are poorly known, reflecting the difficulty in studying such organisms in their natural environments. Some insight can be gained from the study of the spatial variability in microcrustacean communities in groundwater-fed springs. Earthquakes can increase hydraulic conductivity in the recharge area of karstic aquifers and flow rates in discharge zones, thus dislodging stygobites from their original habitats to the spring outlets. Earthquakes are expected to alter species spatial niche overlap at the spring outlets, where stygobites coexist with non-stygobites living in benthic and subsurface habitats. We compared the abundance of stygobiotic and non-stygobiotic microcrustaceans in groundwater-fed springs before and after the 6.3-Mw earthquake that hit the karstic Gran Sasso Aquifer (Italy) in 2009. Pre-seismic (1997, 2005) overall niche overlaps were not different from null expectations, while post-seismic (2012) species mean niche overlaps were higher, following the redistribution of animals caused by the earthquake-triggered discharge. The reduced abundance of stygobites following their dislodgement from the aquifer and the concomitant displacement of non-stygobites led to a higher post-seismic co-occurrence of stygobites and non-stygobites. Changes in aquifer structure destroyed pre-seismic species segregation patterns by creating new or strengthening already existing interactions.
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