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Hederström V, Ekroos J, Friberg M, Krausl T, Opedal ØH, Persson AS, Petrén H, Quan Y, Smith HG, Clough Y. Pollinator-mediated effects of landscape-scale land use on grassland plant community composition and ecosystem functioning - seven hypotheses. Biol Rev Camb Philos Soc 2024; 99:675-698. [PMID: 38118437 DOI: 10.1111/brv.13040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 12/05/2023] [Accepted: 12/07/2023] [Indexed: 12/22/2023]
Abstract
Environmental change is disrupting mutualisms between organisms worldwide. Reported declines in insect populations and changes in pollinator community compositions in response to land use and other environmental drivers have put the spotlight on the need to conserve pollinators. While this is often motivated by their role in supporting crop yields, the role of pollinators for reproduction and resulting taxonomic and functional assembly in wild plant communities has received less attention. Recent findings suggest that observed and experimental gradients in pollinator availability can affect plant community composition, but we know little about when such shifts are to be expected, or the impact they have on ecosystem functioning. Correlations between plant traits related to pollination and plant traits related to other important ecosystem functions, such as productivity, nitrogen uptake or palatability to herbivores, lead us to expect non-random shifts in ecosystem functioning in response to changes in pollinator communities. At the same time, ecological and evolutionary processes may counteract these effects of pollinator declines, limiting changes in plant community composition, and in ecosystem functioning. Despite calls to investigate community- and ecosystem-level impacts of reduced pollination, the study of pollinator effects on plants has largely been confined to impacts on plant individuals or single-species populations. With this review we aim to break new ground by bringing together aspects of landscape ecology, ecological and evolutionary plant-insect interactions, and biodiversity-ecosystem functioning research, to generate new ideas and hypotheses about the ecosystem-level consequences of pollinator declines in response to land-use change, using grasslands as a focal system. Based on an integrated set of seven hypotheses, we call for more research investigating the putative pollinator-mediated links between landscape-scale land use and ecosystem functioning. In particular, future research should use combinations of experimental and observational approaches to assess the effects of changes in pollinator communities over multiple years and across species on plant communities and on trait distributions both within and among species.
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Affiliation(s)
- Veronica Hederström
- Centre for Environmental and Climate Science, Lund University, Sölvegatan 37, Lund, 223 62, Sweden
| | - Johan Ekroos
- Centre for Environmental and Climate Science, Lund University, Sölvegatan 37, Lund, 223 62, Sweden
| | - Magne Friberg
- Department of Biology, Lund University, Sölvegatan 37, Lund, 223 62, Sweden
| | - Theresia Krausl
- Centre for Environmental and Climate Science, Lund University, Sölvegatan 37, Lund, 223 62, Sweden
| | - Øystein H Opedal
- Department of Biology, Lund University, Sölvegatan 37, Lund, 223 62, Sweden
| | - Anna S Persson
- Centre for Environmental and Climate Science, Lund University, Sölvegatan 37, Lund, 223 62, Sweden
| | - Hampus Petrén
- Department of Biology, Lund University, Sölvegatan 37, Lund, 223 62, Sweden
| | - Yuanyuan Quan
- Centre for Environmental and Climate Science, Lund University, Sölvegatan 37, Lund, 223 62, Sweden
| | - Henrik G Smith
- Centre for Environmental and Climate Science, Lund University, Sölvegatan 37, Lund, 223 62, Sweden
- Department of Biology, Lund University, Sölvegatan 37, Lund, 223 62, Sweden
| | - Yann Clough
- Centre for Environmental and Climate Science, Lund University, Sölvegatan 37, Lund, 223 62, Sweden
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2
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Rogers AM, Yong RQY, Holden MH. The house of a thousand species: The untapped potential of comprehensive biodiversity censuses of urban properties. Ecology 2024; 105:e4225. [PMID: 38038234 DOI: 10.1002/ecy.4225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 10/19/2023] [Accepted: 11/10/2023] [Indexed: 12/02/2023]
Affiliation(s)
- Andrew M Rogers
- School of the Environment, The University of Queensland, Brisbane, Queensland, Australia
| | - Russell Q-Y Yong
- Water Research Group, Unit for Environmental Sciences and Management, North-West University, Potchefstroom, South Africa
| | - Matthew H Holden
- School of Mathematics and Physics, The University of Queensland, Brisbane, Queensland, Australia
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3
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Tommasi N, Biella P, Maggioni D, Fallati L, Agostinetto G, Labra M, Galli P, Galimberti A. DNA metabarcoding unveils the effects of habitat fragmentation on pollinator diversity, plant-pollinator interactions, and pollination efficiency in Maldive islands. Mol Ecol 2023; 32:6394-6404. [PMID: 35651283 DOI: 10.1111/mec.16537] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 04/26/2022] [Accepted: 05/05/2022] [Indexed: 11/30/2022]
Abstract
Habitat fragmentation affects biodiversity, but with unclear effects on pollinators and their interactions with plants in anthropized landscapes. Islands could serve as open air laboratories, suitable to disentangle how land-use alteration impacts pollination ecology. In Maldive islands we investigated how pollinator richness, plant-pollinator interactions and pollination efficiency are influenced by the green area fragmentation (i.e., gardens and semi-natural patches). Moreover, we considered the mediating role of pollinator body size and the plant trait of being invasive in shaping interactions. To do this, we surveyed pollinator insects from 11 islands representing a gradient of green area fragmentation. A DNA metabarcoding approach was adopted to identify the pollen transported by pollinators and characterize the plant-pollinator interactions. We found that intermediate levels of green area fragmentation characterized pollinator communities and increased their species richness, while decreasing interaction network complexity. Invasive plants were more frequently found on pollinator bodies than native or exotic noninvasive ones, indicating a concerningly higher potential for pollen dispersal and reproduction of the former ones. Intriguingly, pollinator body size mediated the effect of landscape alteration on interactions, as only the largest bees expanded the foraging diet in terms of plant richness in the transported pollen at increasing fragmentation. In parallel, the pollination efficiency increased with pollinator species richness in two sentinel plants. This study shows that moderate landscape fragmentation of green areas shapes many aspects of the pollination ecosystem service, where despite interactions being less complex and mediated by pollinator body size, pollinator insect biodiversity and potential plant reproduction are supported.
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Affiliation(s)
- Nicola Tommasi
- ZooplantLab, Department of Biotechnology and Biosciences, University of Milano-Bicocca, Milan, Italy
- INFN Sezione Milano Bicocca, Milan, Italy
| | - Paolo Biella
- ZooplantLab, Department of Biotechnology and Biosciences, University of Milano-Bicocca, Milan, Italy
| | - Davide Maggioni
- Earth and Environmental Science Department, University of Milano Bicocca, Milan, Italy
- MaRHE Center (Marine Research and High Education Center), Magoodhoo, Maldives
| | - Luca Fallati
- Earth and Environmental Science Department, University of Milano Bicocca, Milan, Italy
- MaRHE Center (Marine Research and High Education Center), Magoodhoo, Maldives
| | - Giulia Agostinetto
- ZooplantLab, Department of Biotechnology and Biosciences, University of Milano-Bicocca, Milan, Italy
| | - Massimo Labra
- ZooplantLab, Department of Biotechnology and Biosciences, University of Milano-Bicocca, Milan, Italy
- INFN Sezione Milano Bicocca, Milan, Italy
| | - Paolo Galli
- Earth and Environmental Science Department, University of Milano Bicocca, Milan, Italy
- MaRHE Center (Marine Research and High Education Center), Magoodhoo, Maldives
| | - Andrea Galimberti
- ZooplantLab, Department of Biotechnology and Biosciences, University of Milano-Bicocca, Milan, Italy
- INFN Sezione Milano Bicocca, Milan, Italy
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4
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Vizentin-Bugoni J, Maruyama PK. To rewire or not to rewire: To what extent rewiring to surviving partners can avoid extinction? J Anim Ecol 2023; 92:1676-1679. [PMID: 37670422 DOI: 10.1111/1365-2656.13972] [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: 06/02/2023] [Accepted: 06/13/2023] [Indexed: 09/07/2023]
Abstract
Research Highlight: Leimberger, K.G., Hadley, A.S., & Betts, M.G. (2023). Plant-hummingbird pollination networks exhibit minimal rewiring after experimental removal of a locally abundant plant species. Journal of Animal Ecology, https://doi.org/10.1111/1365-2656.13935. In this paper, Leimberger, Hadley and Betts (2023) explore the effects of removing a locally abundant plant species on plant-hummingbird pollination networks. They experimentally prevented access of hummingbirds to flowers of Heliconia tortuosa and assessed subsequent changes in the interactions between plants and hummingbirds. Their main hypothesis postulated that the loss of a highly connected species would lead to interaction rewiring and niche expansions by hummingbirds, decreasing individual, species and network specialization. However, they found that the overall structure of the plant-hummingbird networks remains mostly unaltered, with limited rewiring and minimal changes in specialization. The main contributions of this study can be summarized as (i) it adds to a limited number of manipulative studies on the capacity of species to rewire their interactions following the loss of partners, and importantly, it is the first study from the tropics and with vertebrate pollinators, for which experimental studies at appropriate scales is intrinsically more challenging; and (ii) innovates by evaluating change in specialization for the individual level, carried out through pollen sampling on the body of hummingbirds. The limited change in species interactions highlights that network stability through interaction rewiring may have been overestimated in previous studies, calling for further manipulative studies in the field. At the same time, it also indicated that even the loss of a highly abundant plant species has an overall small effect on network structure. Thus, this study contributes timely findings regarding the capacity of ecological communities to respond to species extinctions.
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Affiliation(s)
- Jeferson Vizentin-Bugoni
- Laboratório de Ecologia de Interações & Programa de Pós-Graduação em Biodiversidade Animal, Departamento de Ecologia Zoologia e Genética, Universidade Federal de Pelotas-UFPel, Pelotas, Brazil
| | - Pietro Kiyoshi Maruyama
- Centro de Síntese Ecológica e Conservação, Departamento de Genética, Ecologia e Evolução, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais-UFMG, Belo Horizonte, Brazil
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5
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Vizentin-Bugoni J, Sperry JH, Kelley JP, Foster JT, Drake DR, Case SB, Gleditsch JM, Hruska AM, Wilcox RC, Tarwater CE. Mechanisms underlying interaction frequencies and robustness in a novel seed dispersal network: lessons for restoration. Proc Biol Sci 2022; 289:20221490. [PMID: 36100025 PMCID: PMC9470274 DOI: 10.1098/rspb.2022.1490] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Accepted: 08/15/2022] [Indexed: 12/25/2022] Open
Abstract
As human-caused extinctions and invasions accumulate across the planet, understanding the processes governing ecological functions mediated by species interactions, and anticipating the effect of species loss on such functions become increasingly urgent. In seed dispersal networks, the mechanisms that influence interaction frequencies may also influence the capacity of a species to switch to alternative partners (rewiring), influencing network robustness. Studying seed dispersal interactions in novel ecosystems on O'ahu island, Hawai'i, we test whether the same mechanisms defining interaction frequencies can regulate rewiring and increase network robustness to simulated species extinctions. We found that spatial and temporal overlaps were the primary mechanisms underlying interaction frequencies, and the loss of the more connected species affected networks to a greater extent. Further, rewiring increased network robustness, and morphological matching and spatial and temporal overlaps between partners were more influential on network robustness than species abundances. We argue that to achieve self-sustaining ecosystems, restoration initiatives can consider optimal morphological matching and spatial and temporal overlaps between consumers and resources to maximize chances of native plant dispersal. Specifically, restoration initiatives may benefit from replacing invasive species with native species possessing characteristics that promote frequent interactions and increase the probability of rewiring (such as long fruiting periods, small seeds and broad distributions).
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Affiliation(s)
- Jeferson Vizentin-Bugoni
- Departamento de Ecologia, Universidade Federal do Rio Grande do Sul, Avenue Bento Gonçalves 9500, Porto Alegre, Rio Grande do Sul 91501-970, Brazil
- US Army Corps of Engineers, Engineer Research Development Center, 2902 Newmark Dr, Champaign, IL 61826, USA
- Department of Natural Resources and Environmental Sciences, University of Illinois at Urbana-Champaign, 1102 South Goodwin Avenue, Urbana, IL 61801, USA
- Department of Zoology and Physiology, University of Wyoming, 1000 East University Avenue, Laramie, WY 82071, USA
| | - Jinelle H. Sperry
- US Army Corps of Engineers, Engineer Research Development Center, 2902 Newmark Dr, Champaign, IL 61826, USA
- Department of Natural Resources and Environmental Sciences, University of Illinois at Urbana-Champaign, 1102 South Goodwin Avenue, Urbana, IL 61801, USA
| | - J. Patrick Kelley
- Department of Zoology and Physiology, University of Wyoming, 1000 East University Avenue, Laramie, WY 82071, USA
| | - Jeffrey T. Foster
- Department of Molecular, Cellular, and Biomedical Sciences, University of New Hampshire, Durham, NH 03824, USA
| | - Donald R. Drake
- School of Life Sciences, University of Hawai‘i at Mānoa, Honolulu, HI 96822, USA
| | - Samuel B. Case
- Department of Zoology and Physiology, University of Wyoming, 1000 East University Avenue, Laramie, WY 82071, USA
| | - Jason M. Gleditsch
- Department of Natural Resources and Environmental Sciences, University of Illinois at Urbana-Champaign, 1102 South Goodwin Avenue, Urbana, IL 61801, USA
- Integrative Ecology Laboratory, Center for Biodiversity, Temple University, Philadelphia, PA 19122, USA
| | - Amy M. Hruska
- Department of Botany, University of Hawai‘i at Mānoa, Honolulu, HI 96822, USA
- Smithsonian Environmental Research Center, Edgewater, MD 21037, USA
| | - Rebecca C. Wilcox
- Department of Zoology and Physiology, University of Wyoming, 1000 East University Avenue, Laramie, WY 82071, USA
| | - Corey E. Tarwater
- Department of Zoology and Physiology, University of Wyoming, 1000 East University Avenue, Laramie, WY 82071, USA
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Klečka J, Mikát M, Koloušková P, Hadrava J, Straka J. Individual-level specialisation and interspecific resource partitioning in bees revealed by pollen DNA metabarcoding. PeerJ 2022; 10:e13671. [PMID: 35959478 PMCID: PMC9359135 DOI: 10.7717/peerj.13671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Accepted: 06/12/2022] [Indexed: 01/17/2023] Open
Abstract
It is increasingly recognised that intraspecific variation in traits, such as morphology, behaviour, or diet is both ubiquitous and ecologically important. While many species of predators and herbivores are known to display high levels of between-individual diet variation, there is a lack of studies on pollinators. It is important to fill in this gap because individual-level specialisation of flower-visiting insects is expected to affect their efficiency as pollinators with consequences for plant reproduction. Accordingly, the aim of our study was to quantify the level of individual-level specialisation and foraging preferences, as well as interspecific resource partitioning, in three co-occurring species of bees of the genus Ceratina (Hymenoptera: Apidae: Xylocopinae), C. chalybea, C. nigrolabiata, and C. cucurbitina. We conducted a field experiment where we provided artificial nesting opportunities for the bees and combined a short-term mark-recapture study with the dissection of the bees' nests to obtain repeated samples from individual foraging females and complete pollen provisions from their nests. We used DNA metabarcoding based on the ITS2 locus to identify the composition of the pollen samples. We found that the composition of pollen carried on the bodies of female bees and stored in the brood provisions in their nests significantly differed among the three co-occurring species. At the intraspecific level, individual females consistently differed in their level of specialisation and in the composition of pollen carried on their bodies and stored in their nests. We also demonstrate that higher generalisation at the species level stemmed from larger among-individual variation in diets, as observed in other types of consumers, such as predators. Our study thus reveals how specialisation and foraging preferences of bees change from the scale of individual foraging bouts to complete pollen provisions accumulated in their nests over many days. Such a multi-scale view of foraging behaviour is necessary to improve our understanding of the functioning of plant-flower visitor communities.
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Affiliation(s)
- Jan Klečka
- Institute of Entomology, Biology Centre of the Czech Academy of Sciences, České Budějovice, Czech Republic
| | - Michael Mikát
- Department of Zoology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Pavla Koloušková
- Institute of Entomology, Biology Centre of the Czech Academy of Sciences, České Budějovice, Czech Republic
| | - Jiří Hadrava
- Institute of Entomology, Biology Centre of the Czech Academy of Sciences, České Budějovice, Czech Republic,Department of Zoology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Jakub Straka
- Department of Zoology, Faculty of Science, Charles University, Prague, Czech Republic
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7
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Johnson CA, Dutt P, Levine JM. Competition for pollinators destabilizes plant coexistence. Nature 2022; 607:721-725. [PMID: 35859181 DOI: 10.1038/s41586-022-04973-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Accepted: 06/13/2022] [Indexed: 11/09/2022]
Abstract
Mounting concern over the global decline of pollinators has fuelled calls for investigating their role in maintaining plant diversity1,2. Theory predicts that competition for pollinators can stabilize interactions between plant species by providing opportunities for niche differentiation3, while at the same time can drive competitive imbalances that favour exclusion4. Here we empirically tested these contrasting effects by manipulating competition for pollinators in a way that predicts its long-term implications for plant coexistence. We subjected annual plant individuals situated across experimentally imposed gradients in neighbour density to either ambient insect pollination or a pollen supplementation treatment alleviating competition for pollinators. The vital rates of these individuals informed plant population dynamic models predicting the key theoretical metrics of species coexistence. Competition for pollinators generally destabilized the interactions between plant species, reducing the proportion of pairs expected to coexist. Interactions with pollinators also influenced the competitive imbalances between plant species, effects that are expected to strengthen with pollinator decline, potentially disrupting plant coexistence. Indeed, results from an experiment simulating pollinator decline showed that plant species experiencing greater reductions in floral visitation also suffered greater declines in population growth rate. Our results reveal that competition for pollinators may weaken plant coexistence by destabilizing interactions and contributing to competitive imbalances, information critical for interpreting the impacts of pollinator decline.
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Affiliation(s)
- Christopher A Johnson
- Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ, USA. .,Institute of Integrative Biology, Swiss Federal Institute of Technology (ETH) Zürich, Zürich, Switzerland.
| | - Proneet Dutt
- Institute of Integrative Biology, Swiss Federal Institute of Technology (ETH) Zürich, Zürich, Switzerland
| | - Jonathan M Levine
- Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ, USA
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8
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Bain JA, Dickson RG, Gruver AM, CaraDonna PJ. Removing flowers of a generalist plant changes pollinator visitation, composition, and interaction network structure. Ecosphere 2022. [DOI: 10.1002/ecs2.4154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Affiliation(s)
- Justin A. Bain
- Negaunee Institute for Plant Conservation Science and Action Chicago Botanic Garden Glencoe Illinois USA
- Plant Biology and Conservation Northwestern University Evanston Illinois USA
- Rocky Mountain Biological Laboratory Crested Butte Colorado USA
| | - Rachel G. Dickson
- Rocky Mountain Biological Laboratory Crested Butte Colorado USA
- Division of Biological Sciences University of Montana Missoula Montana USA
| | - Andrea M. Gruver
- Negaunee Institute for Plant Conservation Science and Action Chicago Botanic Garden Glencoe Illinois USA
- Plant Biology and Conservation Northwestern University Evanston Illinois USA
| | - Paul J. CaraDonna
- Negaunee Institute for Plant Conservation Science and Action Chicago Botanic Garden Glencoe Illinois USA
- Plant Biology and Conservation Northwestern University Evanston Illinois USA
- Rocky Mountain Biological Laboratory Crested Butte Colorado USA
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9
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Saavedra S, Bartomeus I, Godoy O, Rohr RP, Zu P. Towards a system-level causative knowledge of pollinator communities. Philos Trans R Soc Lond B Biol Sci 2022; 377:20210159. [PMID: 35491588 PMCID: PMC9058529 DOI: 10.1098/rstb.2021.0159] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Pollination plays a central role in both crop production and maintaining biodiversity. However, habitat loss, pesticides, invasive species and larger environmental fluctuations are contributing to a dramatic decline of pollinators worldwide. Different management solutions require knowledge of how ecological communities will respond following interventions. Yet, anticipating the response of these systems to interventions remains extremely challenging due to the unpredictable nature of ecological communities, whose nonlinear behaviour depends on the specific details of species interactions and the various unknown or unmeasured confounding factors. Here, we propose that this knowledge can be derived by following a probabilistic systems analysis rooted on non-parametric causal inference. The main outcome of this analysis is to estimate the extent to which a hypothesized cause can increase or decrease the probability that a given effect happens without making assumptions about the form of the cause-effect relationship. We discuss a road map for how this analysis can be accomplished with the aim of increasing our system-level causative knowledge of natural communities. This article is part of the theme issue 'Natural processes influencing pollinator health: from chemistry to landscapes'.
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Affiliation(s)
- Serguei Saavedra
- Department of Civil and Environmental Engineering, MIT, 77 Massachusetts Av., Cambridge, MA 02139, USA
| | - Ignasi Bartomeus
- Estación Biológica de Doñana (EBD-CSIC), 41092, Isla de la Cartuja, Seville, Spain
| | - Oscar Godoy
- Departamento de Biología, Instituto Universitario de Ciencias del Mar (INMAR), Universidad de Cádiz, Royal Port E-11510, Spain
| | - Rudolf P. Rohr
- Department of Biology - Ecology and Evolution, University of Fribourg, Chemin du Musée 10, Fribourg CH-1700, Switzerland
| | - Penguan Zu
- Department of Environmental Systems Science, ETH Zurich, Schmelzbergstrasse 9, Zurich CH-8092, Switzerland,Department Fish Ecology and Evolution, Swiss Federal Institute of Aquatic Science and Technology (Eawag), Seestrasse 79, Kastanienbaum CH-6047, Switzerland
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10
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Biella P, Ssymank A, Galimberti A, Galli P, Perlík M, Ramazzotti F, Rota A, Tommasi N. Updating the list of flower-visiting bees, hoverflies and wasps in the central atolls of Maldives, with notes on land-use effects. Biodivers Data J 2022; 10:e85107. [PMID: 36761651 PMCID: PMC9848504 DOI: 10.3897/bdj.10.e85107] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Accepted: 05/10/2022] [Indexed: 11/12/2022] Open
Abstract
Maldives islands host a unique biodiversity, but their integrity is threatened by climate change and impacting land-uses (e.g. cemented or agricultural areas). As pollinators provide key services for the ecosystems and for the inhabitants, it is crucial to know which pollinators occur in the islands, to characterise their genetic identity and to understand which plants they visit and the size of the human impact. Given that no significant faunistic surveys of Hymenoptera have been published for the country in more than 100 years and that Syrphidae were only partly investigated, we sampled islands in the central part of the Maldives country (Faafu and Daahlu atolls) and hand-netted flower-visiting bees, wasps and hoverflies (Hymenoptera: Anthophila, Crabronidae, Sphecidae, Vespidae, Scoliidae and Diptera: Syrphidae). Overall, we found 21 species; 76.4% of the collected specimens were Anthophila (bees), 12.7% belonged to several families of wasps and 10.8% of individuals were Syrphidae. It seems that one third of species are new for the Maldives, based on the published literature. Human land-uses seem to shape the local pollinator fauna since the assemblages of bees, wasps and hoverflies from urbanised and agricultural islands differed from those in resort and natural ones. These pollinators visited 30 plant species in total, although some invasive plants hosted the highest number of flower visitor species. Biogeographically, this pollinating fauna is mostly shared with Sri Lanka and India. Genetically, the used marker hinted for a unique fauna in relation to the rest of the distribution ranges in most cases, although generally within the level of intraspecific genetic variation. This study significantly contributes to increasing the knowledge on the pollinator diversity and genetic identity in Maldives islands also considering the important implications for the islands' land-use and the role of invasive plants. This study will be pivotal for future pollination studies and biodiversity conservation efforts in the region.
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Affiliation(s)
- Paolo Biella
- ZooPlantLab, Department of Biotechnology and Biosciences, University of Milano-Bicocca, Milano, ItalyZooPlantLab, Department of Biotechnology and Biosciences, University of Milano-BicoccaMilanoItaly
| | - Axel Ssymank
- Bundesamt für Naturschutz, Bonn, GermanyBundesamt für NaturschutzBonnGermany
| | - Andrea Galimberti
- ZooPlantLab, Department of Biotechnology and Biosciences, University of Milano-Bicocca, Milano, ItalyZooPlantLab, Department of Biotechnology and Biosciences, University of Milano-BicoccaMilanoItaly
| | - Paolo Galli
- Earth and Environmental Science Department, University of Milano-Bicocca, Milano, ItalyEarth and Environmental Science Department, University of Milano-BicoccaMilanoItaly,MaRHE Center (Marine Research and High Education Center), Magoodhoo, MaldivesMaRHE Center (Marine Research and High Education Center)MagoodhooMaldives
| | - Michal Perlík
- Faculty of Science, University of South Bohemia, Ceske Budejovice, Czech RepublicFaculty of Science, University of South BohemiaCeske BudejoviceCzech Republic,Institute of Entomology, Biology Centre of the Czech Academy of Sciences, Ceske Budejovice, Czech RepublicInstitute of Entomology, Biology Centre of the Czech Academy of SciencesCeske BudejoviceCzech Republic
| | - Fausto Ramazzotti
- ZooPlantLab, Department of Biotechnology and Biosciences, University of Milano-Bicocca, Milano, ItalyZooPlantLab, Department of Biotechnology and Biosciences, University of Milano-BicoccaMilanoItaly
| | - Alessia Rota
- ZooPlantLab, Department of Biotechnology and Biosciences, University of Milano-Bicocca, Milano, ItalyZooPlantLab, Department of Biotechnology and Biosciences, University of Milano-BicoccaMilanoItaly
| | - Nicola Tommasi
- ZooPlantLab, Department of Biotechnology and Biosciences, University of Milano-Bicocca, Milano, ItalyZooPlantLab, Department of Biotechnology and Biosciences, University of Milano-BicoccaMilanoItaly
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11
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Tommasi N, Pioltelli E, Biella P, Labra M, Casiraghi M, Galimberti A. Effect of urbanization and its environmental stressors on the intraspecific variation of flight functional traits in two bumblebee species. Oecologia 2022; 199:289-299. [PMID: 35575832 PMCID: PMC9225972 DOI: 10.1007/s00442-022-05184-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Accepted: 05/05/2022] [Indexed: 11/26/2022]
Abstract
The way urbanization shapes the intraspecific variation of pollinator functional traits is little understood. However, this topic is relevant for investigating ecosystem services and pollinator health. Here, we studied how urbanization affects the functional traits of workers in two bumblebee species (Bombus terrestris and B. pascuorum) sampled in 37 sites along a gradient of urbanization in North Italy (an area of 1800 km2 including the metropolitan context of Milan and other surrounding capital districts). Namely, we investigated the effect of land use composition, configuration, air temperature, flower resource abundance, and air pollutants on the variation of traits related to flight performance and of stress during insect development (i.e., wing size, wing shape and size fluctuating asymmetry). The functional traits of the two bumblebees responded idiosyncratically to urbanization. Urban temperatures were associated with smaller wing sizes in B. pascuorum and with more accentuated fluctuating asymmetry of wing size in B. terrestris. Moreover, flower abundance correlated with bigger wings in B. terrestris and with less asymmetric wing size in B. pascuorum. Other traits did not vary significantly, and other urban variables played minor effects. These species-specific variation patterns highlight that environmental stressor linked to urbanization negatively impact the traits related to flight performance and development stability of these syntopic bumblebees, with possible consequences on the pollination service they provide.
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Affiliation(s)
- Nicola Tommasi
- ZooplantLab, Department of Biotechnology and Biosciences, University of Milano-Bicocca, Milan, Italy
- INFN Sezione Di Milano Bicocca, Milan, Italy
| | - Emiliano Pioltelli
- ZooplantLab, Department of Biotechnology and Biosciences, University of Milano-Bicocca, Milan, Italy
| | - Paolo Biella
- ZooplantLab, Department of Biotechnology and Biosciences, University of Milano-Bicocca, Milan, Italy
| | - Massimo Labra
- ZooplantLab, Department of Biotechnology and Biosciences, University of Milano-Bicocca, Milan, Italy
- INFN Sezione Di Milano Bicocca, Milan, Italy
| | - Maurizio Casiraghi
- ZooplantLab, Department of Biotechnology and Biosciences, University of Milano-Bicocca, Milan, Italy
| | - Andrea Galimberti
- ZooplantLab, Department of Biotechnology and Biosciences, University of Milano-Bicocca, Milan, Italy.
- INFN Sezione Di Milano Bicocca, Milan, Italy.
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12
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Biella P, Tommasi N, Guzzetti L, Pioltelli E, Labra M, Galimberti A. City climate and landscape structure shape pollinators, nectar and transported pollen along a gradient of urbanization. J Appl Ecol 2022. [DOI: 10.1111/1365-2664.14168] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Paolo Biella
- ZooPlantLab, Department of Biotechnology and Biosciences University of Milano‐Bicocca Milan Italy
| | - Nicola Tommasi
- ZooPlantLab, Department of Biotechnology and Biosciences University of Milano‐Bicocca Milan Italy
- Istituto Nazionale di Fisica Nucleare ‐ Sez. Milano Bicocca Milan Italy
| | - Lorenzo Guzzetti
- ZooPlantLab, Department of Biotechnology and Biosciences University of Milano‐Bicocca Milan Italy
| | - Emiliano Pioltelli
- ZooPlantLab, Department of Biotechnology and Biosciences University of Milano‐Bicocca Milan Italy
| | - Massimo Labra
- ZooPlantLab, Department of Biotechnology and Biosciences University of Milano‐Bicocca Milan Italy
- Istituto Nazionale di Fisica Nucleare ‐ Sez. Milano Bicocca Milan Italy
| | - Andrea Galimberti
- ZooPlantLab, Department of Biotechnology and Biosciences University of Milano‐Bicocca Milan Italy
- Istituto Nazionale di Fisica Nucleare ‐ Sez. Milano Bicocca Milan Italy
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13
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Akter A, Klečka J. Water stress and nitrogen supply affect floral traits and pollination of the white mustard, Sinapis alba (Brassicaceae). PeerJ 2022; 10:e13009. [PMID: 35462774 PMCID: PMC9022644 DOI: 10.7717/peerj.13009] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Accepted: 02/04/2022] [Indexed: 01/11/2023] Open
Abstract
Changes in environmental conditions are likely to have a complex effect on the growth of plants, their phenology, plant-pollinator interactions, and reproductive success. The current world is facing an ongoing climate change along with other human-induced environmental changes. Most research has focused on the impact of increasing temperature as a major driving force for climate change, but other factors may have important impacts on plant traits and pollination too and these effects may vary from season to season. In addition, it is likely that the effects of multiple environmental factors, such as increasing temperature, water availability, and nitrogen enrichment are not independent. Therefore, we tested the impact of two key factors-water, and nitrogen supply-on plant traits, pollination, and seed production in Sinapis alba (Brassicaceae) in three seasons defined as three temperature conditions with two levels of water and nitrogen supply in a factorial design. We collected data on multiple vegetative and floral traits and assessed the response of pollinators in the field. Additionally, we evaluated the effect of growing conditions on seed set in plants exposed to pollinators and in hand-pollinated plants. Our results show that water stress impaired vegetative growth, decreased flower production, and reduced visitation by pollinators and seed set, while high amount of nitrogen increased nectar production under low water availability in plants grown in the spring. Temperature modulated the effect of water and nitrogen availability on vegetative and floral traits and strongly affected flowering phenology and flower production. We demonstrated that changes in water and nitrogen availability alter plant vegetative and floral traits, which impacts flower visitation and consequently plant reproduction. We conclude that ongoing environmental changes such as increasing temperature, altered precipitation regimes and nitrogen enrichment may thus affect plant-pollinator interactions with negative consequences for the reproduction of wild plants and insect-pollinated crops.
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Affiliation(s)
- Asma Akter
- Department of Zoology, Faculty of Science, University of South Bohemia, České Budějovice, Czech Republic,Institute of Entomology, Biology Centre of the Czech Academy of Sciences, České Budějovice, Czech Republic
| | - Jan Klečka
- Institute of Entomology, Biology Centre of the Czech Academy of Sciences, České Budějovice, Czech Republic
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14
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Latinovic A, Nichols DS, Adams VM, McQuillan PB. Grouped SPME Comparison of Floral Scent as a Method of Unlocking Phylogenetic Patterns in Volatiles. Front Ecol Evol 2022. [DOI: 10.3389/fevo.2022.795122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Global crop production rate has exceeded the availability of pollination services provided by managed honeybees, and habitat loss remains a key factor in the loss of wild pollinators. Revegetation of agricultural land and wild pollination may provide a solution; however, the collection of floral trait data that are correlated to pollinator preferences remains an under studied and complex process. Here, we demonstrate a method for scent analysis, ordination [non-metric dimensional scaling (NMDS)], and clustering outputs that provides a fast and reproducible procedure for a broad grouping of flora based on scent and unlocking characteristic inter-floral patterns. We report the floral profiles of 15 unstudied native Australian plant species and the extent to which they match the commonly cultivated seed crops of Daucus carota L and Brassica rapa L. Through solid-phase microextraction (SPME) paired with gas chromatography–mass spectrometry (GC-MS), we identify a set of inter-family shared, common floral volatiles from these plant species as well as unique and characteristic patterns.
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15
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Klomberg Y, Tropek R, Mertens JEJ, Kobe IN, Hodeček J, Raška J, Fominka NT, Souto-Vilarós D, Janečková P, Janeček Š. Spatiotemporal variation in the role of floral traits in shaping tropical plant-pollinator interactions. Ecol Lett 2022; 25:839-850. [PMID: 35006639 DOI: 10.1111/ele.13958] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 06/09/2021] [Accepted: 12/11/2021] [Indexed: 12/30/2022]
Abstract
The pollination syndrome hypothesis predicts that plants pollinated by the same pollinator group bear convergent combinations of specific floral functional traits. Nevertheless, some studies have shown that these combinations predict pollinators with relatively low accuracy. This discrepancy may be caused by changes in the importance of specific floral traits for different pollinator groups and under different environmental conditions. To explore this, we studied pollination systems and floral traits along an elevational gradient on Mount Cameroon during wet and dry seasons. Using Random Forest (Machine Learning) models, allowing the ranking of traits by their relative importance, we demonstrated that some floral traits are more important than others for pollinators. However, the distribution and importance of traits vary under different environmental conditions. Our results imply the need to improve our trait-based understanding of plant-pollinator interactions to better inform the debate surrounding the pollination syndrome hypothesis.
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Affiliation(s)
- Yannick Klomberg
- Department of Ecology, Faculty of Science, Charles University, Prague, Czechia.,Naturalis Biodiversity Center, Leiden, The Netherlands
| | - Robert Tropek
- Department of Ecology, Faculty of Science, Charles University, Prague, Czechia.,Institute of Entomology, Biology Centre, Czech Academy of Sciences, České Budějovice, Czechia
| | - Jan E J Mertens
- Department of Ecology, Faculty of Science, Charles University, Prague, Czechia
| | - Ishmeal N Kobe
- Department of Ecology, Faculty of Science, Charles University, Prague, Czechia
| | - Jiří Hodeček
- Department of Ecology, Faculty of Science, Charles University, Prague, Czechia.,Swiss Human Institute of Forensic Taphonomy, University Centre of Legal Medicine Lausanne-Geneva, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland
| | - Jan Raška
- Department of Ecology, Faculty of Science, Charles University, Prague, Czechia
| | - Nestoral T Fominka
- Department of Zoology and Animal Physiology, Faculty of Science, University of Buea, Buea, Cameroon
| | | | - Petra Janečková
- Department of Ecology, Faculty of Science, Charles University, Prague, Czechia
| | - Štěpán Janeček
- Department of Ecology, Faculty of Science, Charles University, Prague, Czechia
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16
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Chesshire PR, McCabe LM, Cobb NS. Variation in Plant-Pollinator Network Structure along the Elevational Gradient of the San Francisco Peaks, Arizona. INSECTS 2021; 12:insects12121060. [PMID: 34940148 PMCID: PMC8704280 DOI: 10.3390/insects12121060] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 11/18/2021] [Accepted: 11/24/2021] [Indexed: 11/16/2022]
Abstract
The structural patterns comprising bimodal pollination networks can help characterize plant-pollinator systems and the interactions that influence species distribution and diversity over time and space. We compare network organization of three plant-pollinator communities along the altitudinal gradient of the San Francisco Peaks in northern Arizona. We found that pollination networks become more nested, as well as exhibit lower overall network specialization, with increasing elevation. Greater weight of generalist pollinators at higher elevations of the San Francisco Peaks may result in plant-pollinator communities less vulnerable to future species loss due to changing climate or shifts in species distribution. We uncover the critical, more generalized pollinator species likely responsible for higher nestedness and stability at the higher elevation environment. The generalist species most important for network stability may be of the greatest interest for conservation efforts; preservation of the most important links in plant-pollinator networks may help secure the more specialized pollinators and maintain species redundancy in the face of ecological change, such as changing climate.
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Affiliation(s)
- Paige R. Chesshire
- Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ 86011, USA
- Biodiversity Outreach Network (BON), Mesa, AZ 86011, USA;
- Correspondence:
| | | | - Neil S. Cobb
- Biodiversity Outreach Network (BON), Mesa, AZ 86011, USA;
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17
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Pollination success increases with plant diversity in high-Andean communities. Sci Rep 2021; 11:22107. [PMID: 34764375 PMCID: PMC8586006 DOI: 10.1038/s41598-021-01611-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Accepted: 10/27/2021] [Indexed: 11/25/2022] Open
Abstract
Pollinator-mediated plant–plant interactions have traditionally been viewed within the competition paradigm. However, facilitation via pollinator sharing might be the rule rather than the exception in harsh environments. Moreover, plant diversity could be playing a key role in fostering pollinator-mediated facilitation. Yet, the facilitative effect of plant diversity on pollination remains poorly understood, especially under natural conditions. By examining a total of 9371 stigmas of 88 species from nine high-Andean communities in NW Patagonia, we explored the prevalent sign of the relation between conspecific pollen receipt and heterospecific pollen diversity, and assessed whether the incidence of different outcomes varies with altitude and whether pollen receipt relates to plant diversity. Conspecific pollen receipt increased with heterospecific pollen diversity on stigmas. In all communities, species showed either positive or neutral but never negative relations between the number of heterospecific pollen donor species and conspecific pollen receipt. The incidence of species showing positive relations increased with altitude. Finally, stigmas collected from communities with more co-flowering species had richer heterospecific pollen loads and higher abundance of conspecific pollen grains. Our findings suggest that plant diversity enhances pollination success in high-Andean plant communities. This study emphasizes the importance of plant diversity in fostering indirect plant–plant facilitative interactions in alpine environments, which could promote species coexistence and biodiversity maintenance.
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18
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Fantinato E, Sonkoly J, Török P, Buffa G. Patterns of pollination interactions at the community level are related to the type and quantity of floral resources. Funct Ecol 2021. [DOI: 10.1111/1365-2435.13915] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Edy Fantinato
- Department of Environmental Sciences, Informatics and Statistics University Ca' Foscari of Venice Venice Italy
| | - Judit Sonkoly
- Department of Ecology University of Debrecen Debrecen Hungary
- MTA‐DE Lendület Functional and Restoration Ecology Research Group Debrecen Hungary
| | - Péter Török
- Department of Ecology University of Debrecen Debrecen Hungary
- MTA‐DE Lendület Functional and Restoration Ecology Research Group Debrecen Hungary
- Polish Academy of Sciences Botanical Garden ‐ Center for Biological Diversity Conservation in Powsin Warszawa Poland
| | - Gabriella Buffa
- Department of Environmental Sciences, Informatics and Statistics University Ca' Foscari of Venice Venice Italy
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19
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Chmel K, Ewome FL, Gómez GU, Klomberg Y, Mertens JEJ, Tropek R, Janeček Š. Bird pollination syndrome is the plant's adaptation to ornithophily, but nectarivorous birds are not so selective. OIKOS 2021. [DOI: 10.1111/oik.08052] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Kryštof Chmel
- Dept. of Ecology, Faculty of Science, Charles Univ. Viničná Prague Czechia
- Inst. of Entomology, Biology Centre, Czech Academy of Sciences Branišovská České Budějovice Czechia
| | | | | | - Yannick Klomberg
- Dept. of Ecology, Faculty of Science, Charles Univ. Viničná Prague Czechia
- Naturalis Biodiversity Center Darwinweg Leiden the Netherlands
| | - Jan E. J. Mertens
- Dept. of Ecology, Faculty of Science, Charles Univ. Viničná Prague Czechia
| | - Robert Tropek
- Dept. of Ecology, Faculty of Science, Charles Univ. Viničná Prague Czechia
- Inst. of Entomology, Biology Centre, Czech Academy of Sciences Branišovská České Budějovice Czechia
| | - Štěpán Janeček
- Dept. of Ecology, Faculty of Science, Charles Univ. Viničná Prague Czechia
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20
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Biella P, Ćetković A, Gogala A, Neumayer J, Sárospataki M, Šima P, Smetana V. Northwestward range expansion of the bumblebee Bombus haematurus into Central Europe is associated with warmer winters and niche conservatism. INSECT SCIENCE 2021; 28:861-872. [PMID: 32401399 DOI: 10.1111/1744-7917.12800] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Revised: 04/21/2020] [Accepted: 05/06/2020] [Indexed: 06/11/2023]
Abstract
Species range expansions are crucial for understanding niche formation and the interaction with the environment. Here, we studied the bumblebee Bombus haematurus Kriechbaumer, 1870, a species historically distributed from northern Serbia through northern Iran which has very recently started expanding northwestward into Central Europe without human-mediated dispersal (i.e., it is a natural spread). After updating the global distribution of this species, we investigated if niche shifts took place during this range expansion between newly colonized and historical areas. In addition, we have explored which climatic factors may have favored the natural range expansion of the species. Our results indicated that Bombus haematurus has colonized large territories in 7 European countries outside the historical area in the period from the 1980s to 2018, a natural expansion over an area that equals 20% of the historical distribution. In addition, this bumblebee performs generalism in flower visitation and it occurs in different habitats, although a preference for forested areas clearly emerges. The land-use associated with the species in the colonized areas is similar to the historical distribution, indicating that no major niche shifts occurred during the spread. Furthermore, in recently colonized localities, the range expansion was associated with warming temperatures during the winter and also during both queen overwintering and emergence phases. These findings document a case of natural range expansion due to environmental change rather than due to niche shifts, and specifically they suggest that warmer winters could be linked to the process of natural colonization of new areas.
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Affiliation(s)
- Paolo Biella
- Department of Biotechnology and Biosciences, University of Milano-Bicocca, Milano, Italy
| | | | - Andrej Gogala
- Department of Invertebrate Zoology, Slovenian Museum of Natural History, Ljubljana, Slovenia
| | | | - Miklós Sárospataki
- Department of Zoology and Ecology, Szent István University, Gödöllő, Hungary
| | - Peter Šima
- Department of Research and Development, Koppert s.r.o., Nové Zámky, Slovakia
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21
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Parra-Tabla V, Arceo-Gómez G. Impacts of plant invasions in native plant-pollinator networks. THE NEW PHYTOLOGIST 2021; 230:2117-2128. [PMID: 33710642 DOI: 10.1111/nph.17339] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2020] [Accepted: 02/25/2021] [Indexed: 06/12/2023]
Abstract
The disruption of mutualisms by invasive species has consequences for biodiversity loss and ecosystem function. Although invasive plant effects on the pollination of individual native species has been the subject of much study, their impacts on entire plant-pollinator communities are less understood. Community-level studies on plant invasion have mainly focused on two fronts: understanding the mechanisms that mediate their integration; and their effects on plant-pollinator network structure. Here we briefly review current knowledge and propose a more unified framework for evaluating invasive species integration and their effects on plant-pollinator communities. We further outline gaps in our understanding and propose ways to advance knowledge in this field. Specifically, modeling approaches have so far yielded important predictions regarding the outcome and drivers of invasive species effects on plant communities. However, experimental studies that test these predictions in the field are lacking. We further emphasize the need to understand the link between invasive plant effects on pollination network structure and their consequences for native plant population dynamics (population growth). Integrating demographic studies with those on pollination networks is thus key in order to achieve a more predictive understanding of pollinator-mediated effects of invasive species on the persistence of native plant biodiversity.
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Affiliation(s)
- Víctor Parra-Tabla
- Departamento de Ecología Tropical, Campus de Ciencias Biológicas y Agropecuarias, Universidad Autónoma de Yucatán, Mérida, Yucatán, 97200, México
| | - Gerardo Arceo-Gómez
- Department of Biological Sciences, East Tennessee State University, Johnson City, TN, 37614, USA
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22
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Changing pollinator communities along a disturbance gradient in the Sundarbans mangrove forest: A case study on Acanthus ilicifolius and Avicennia officinalis. Glob Ecol Conserv 2020. [DOI: 10.1016/j.gecco.2020.e01282] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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23
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Kirmse S, Chaboo CS. Flowers are essential to maintain high beetle diversity (Coleoptera) in a Neotropical rainforest canopy. J NAT HIST 2020. [DOI: 10.1080/00222933.2020.1811414] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Susan Kirmse
- Florida State Collection of Arthropods, Museum of Entomology, Gainesville, FL, USA
| | - Caroline S Chaboo
- Systematics Research Collections, University of Nebraska State Museum, University of Nebraska, Lincoln, NE, USA
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24
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Biella P, Akter A, Ollerton J, Nielsen A, Klecka J. An empirical attack tolerance test alters the structure and species richness of plant–pollinator networks. Funct Ecol 2020. [DOI: 10.1111/1365-2435.13642] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Paolo Biella
- ZooPlantLab Department of Biotechnology and Biosciences University of Milano‐Bicocca Milan Italy
- Faculty of Science University of South Bohemia České Budějovice Czech Republic
- Institute of Entomology Biology Centre Czech Academy of Sciences České Budějovice Czech Republic
| | - Asma Akter
- Faculty of Science University of South Bohemia České Budějovice Czech Republic
- Institute of Entomology Biology Centre Czech Academy of Sciences České Budějovice Czech Republic
| | - Jeff Ollerton
- Faculty of Arts, Science and Technology University of Northampton Northampton UK
| | - Anders Nielsen
- Norwegian Institute for Bioeconomy Research Ås Norway
- Centre for Ecological and Evolutionary Synthesis (CEES) Department of Biosciences University of Oslo Oslo Norway
| | - Jan Klecka
- Institute of Entomology Biology Centre Czech Academy of Sciences České Budějovice Czech Republic
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25
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Iriart V, Baucom RS, Ashman TL. Herbicides as anthropogenic drivers of eco-evo feedbacks in plant communities at the agro-ecological interface. Mol Ecol 2020; 30:5406-5421. [PMID: 32542840 DOI: 10.1111/mec.15510] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2019] [Revised: 04/27/2020] [Accepted: 05/29/2020] [Indexed: 12/16/2022]
Abstract
Herbicides act as human-mediated novel selective agents and community disruptors, yet their full effects on eco-evolutionary dynamics in natural communities have only begun to be appreciated. Here, we synthesize how herbicide exposures can result in dramatic phenotypic and compositional shifts within communities at the agro-ecological interface and how these in turn affect species interactions and drive plant (and plant-associates') evolution in ways that can feedback to continue to affect the ecology and ecosystem functions of these assemblages. We advocate a holistic approach to understanding these dynamics that includes plastic changes and plant community transformations and also extends beyond this single trophic level targeted by herbicides to the effects on nontarget plant-associated organisms and their potential to evolve, thereby embracing the complexity of these real-world systems. We make explicit recommendations for future research to achieve this goal and specifically address impacts of ecology on evolution, evolution on ecology and their feedbacks so that we can gain a more predictive view of the fates of herbicide-impacted communities.
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Affiliation(s)
- Veronica Iriart
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Regina S Baucom
- Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, Michigan, USA
| | - Tia-Lynn Ashman
- Department of Biological Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
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26
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Erenler HE, Gillman MP, Ollerton J. Impact of extreme events on pollinator assemblages. CURRENT OPINION IN INSECT SCIENCE 2020; 38:34-39. [PMID: 32088649 DOI: 10.1016/j.cois.2020.01.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2019] [Revised: 12/24/2019] [Accepted: 01/16/2020] [Indexed: 06/10/2023]
Abstract
Insect pollinators face a number of well-documented threats that challenge their survival at an individual and community level. The effect of extreme events on pollinator assemblages has received little attention to date, partly due to a lack of consensus on what constitutes extreme, but also because robust pre-event data is often lacking. Here, the term SHOCK (Sudden, High-magnitude Opportunity for a Catastrophic 'Kick') is used to encompass attributes of extreme events that carry the potential to add additional challenges to insect communities already facing environmental stressors. Selected events from two SHOCK categories are explored (those with natural origins and those that are human-mediated). The value of studying single events is considered in the context of a third category; human-enhanced SHOCKs.
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Affiliation(s)
- Hilary E Erenler
- Faculty of Arts, Science and Technology, University of Northampton, Waterside Campus, Northampton, NN1 5PH, UK.
| | - Michael P Gillman
- School of Life Sciences, The University of Lincoln, Brayford Pool, Lincoln, LN6 7TS, UK
| | - Jeff Ollerton
- Faculty of Arts, Science and Technology, University of Northampton, Waterside Campus, Northampton, NN1 5PH, UK
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27
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Measuring and Linking the Missing Part of Biodiversity and Ecosystem Function: The Diversity of Biotic Interactions. DIVERSITY 2020. [DOI: 10.3390/d12030086] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Biotic interactions are part of all ecosystem attributes and play an important role in the structure and stability of biological communities. In this study, we give a brief account of how the threads of biotic interactions are linked and how we can measure such complexity by focusing on mutualistic interactions. We start by explaining that although biotic interactions are fundamental ecological processes, they are also a component of biodiversity with a clear α, β and γ diversity structure which can be measured and used to explain how biotic interactions vary over time and space. Specifically, we explain how to estimate the α-diversity by measuring the properties of species interaction networks. We also untangle the components of the β-diversity and how it can be used to make pairwise comparisons between networks. Moreover, we move forward to explain how local ecological networks are a subset of a regional pool of species and potential interactions, γ-diversity, and how this approach allows assessing the spatial and temporal dynamics of ecological networks. Finally, we propose a new framework for studying interactions and the biodiversity–ecosystem function relationship by identifying the unique and common interactions of local networks over space, time or both together.
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28
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Foraging strategies are maintained despite workforce reduction: A multidisciplinary survey on the pollen collected by a social pollinator. PLoS One 2019; 14:e0224037. [PMID: 31693676 PMCID: PMC6834249 DOI: 10.1371/journal.pone.0224037] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Accepted: 10/03/2019] [Indexed: 01/13/2023] Open
Abstract
The way pollinators gather resources may play a key role for buffering their population declines. Social pollinators like bumblebees could adjust their foraging after significant workforce reductions to keep provisions to the colony optimal, especially in terms of pollen diversity and quantity. To test what effects a workforce reduction causes on the foraging for pollen, commercially-acquired colonies of the bumblebee Bombus terrestris were allowed to forage in the field and they were experimentally manipulated by removing half the number of workers. For each bumblebee, the pollen pellets were taxonomically identified with DNA metabarcoding of the ITS2 region followed by a statistical filtering based on ROC curves to filter out underrepresented OTUs. Video cameras and network analyses were employed to investigate changes in foraging strategies and behaviour. After filtering out the false-positives, HTS metabarcoding yielded a high plant diversity in the pollen pellets; for plant identity and pollen quantity traits no differences emerged between samples from treated and from control colonies, suggesting that plant choice was influenced mainly by external factors such as the plant phenology. The colonies responded to the removal of 50% of their workers by increasing the foraging activity of the remaining workers, while only negligible changes were found in diet breadth and indices describing the structure of the pollen transport network. Therefore, a consistency in the bumblebees’ feeding strategies emerges in the short term despite the lowered workforce.
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Vizentin‐Bugoni J, Debastiani VJ, Bastazini VAG, Maruyama PK, Sperry JH. Including rewiring in the estimation of the robustness of mutualistic networks. Methods Ecol Evol 2019. [DOI: 10.1111/2041-210x.13306] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jeferson Vizentin‐Bugoni
- U.S. Army Corps of EngineersEngineer Research and Development Center Champaign IL USA
- Natural Resources and Environmental Sciences Department University of Illinois at Urbana‐Champaign Urbana IL USA
| | - Vanderlei J. Debastiani
- Programa de Pós‐Graduação em Ecologia Universidade Federal do Rio Grande do Sul Porto Alegre RS Brazil
| | - Vinicius A. G. Bastazini
- Centre for Biodiversity Theory and Modelling Theoretical and Experimental Ecology Station French National Center for Scientific Research and Paul Sabatier University Moulis France
| | - Pietro K. Maruyama
- Centro de Síntese Ecológica e Conservação Departamento de Genética, Ecologia e Evolução Instituto de Ciências Biológicas Universidade Federal de Minas Gerais Belo Horizonte MG Brazil
| | - Jinelle H. Sperry
- U.S. Army Corps of EngineersEngineer Research and Development Center Champaign IL USA
- Natural Resources and Environmental Sciences Department University of Illinois at Urbana‐Champaign Urbana IL USA
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