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Sun X, Hu S, He R, Zeng J, Zhao D. Ecological restoration enhanced the stability of epiphytic microbial food webs of submerged macrophytes: Insights from predation characteristics of epiphytic predators. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 948:174547. [PMID: 38992355 DOI: 10.1016/j.scitotenv.2024.174547] [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: 04/24/2024] [Revised: 07/03/2024] [Accepted: 07/04/2024] [Indexed: 07/13/2024]
Abstract
The application of various submerged macrophytes for ecological restoration has gained increasing attention in urban lake ecosystems. The multitrophic microbial communities that colonized in various submerged macrophytes constitute microbial food webs through trophic cascade effects, which affect the biogeochemical cycles of the lake ecosystem and directly determine the effects of ecological restoration. Therefore, it is essential to reveal the diversity, composition, assembly processes, and stability of the microbial communities within epiphytic food webs of diverse submerged macrophytes under eutrophication and ecological restoration scenarios. In this study, we explored the epiphytic microbial food webs of Vallisneria natans and Hydrilla verticillata in both eutrophic and ecological restoration regions. The obtained results indicated that the two regions with different nutrient levels remarkably affected the diversity and composition of epiphytic multitrophic microbial communities of submerged macrophytes, among them, the community composition of epiphytic predators were more prone to change. Secondly, environmental filtering effects played a more important role in driving the community assembly of epiphytic predators than that of prey. Furthermore, the generality and intraguild predation of epiphytic predators were significantly improved within ecological restoration regions, which increased the stability of epiphytic microbial food webs. Additionally, compared with Hydrilla verticillata, the epiphytic microbial food webs of Vallisneria natans exhibited higher multitrophic diversity and higher network stability regardless of regions. Overall, this study focused on the role of the epiphytic microbial food webs of submerged macrophytes in ecological restoration and uncovered the potential of epiphytic predators to enhance the stability of microbial food webs, which may provide new insights into the development of ecological restoration strategies.
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Affiliation(s)
- Xiaojian Sun
- Joint International Research Laboratory of Global Change and Water Cycle, the National Key Laboratory of Water Disaster Prevention, Hohai University, Nanjing 210098, China; State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
| | - Siwen Hu
- Joint International Research Laboratory of Global Change and Water Cycle, the National Key Laboratory of Water Disaster Prevention, Hohai University, Nanjing 210098, China; State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
| | - Rujia He
- Joint International Research Laboratory of Global Change and Water Cycle, the National Key Laboratory of Water Disaster Prevention, Hohai University, Nanjing 210098, China; State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
| | - Jin Zeng
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; Sino-Danish Centre for Education and Research, University of Chinese Academy of Sciences, Beijing 100039, China; Poyang Lake Wetland Research Station, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Jiujiang 332899, China
| | - Dayong Zhao
- Joint International Research Laboratory of Global Change and Water Cycle, the National Key Laboratory of Water Disaster Prevention, Hohai University, Nanjing 210098, China; College of Geography and Remote Sensing, Hohai University, Nanjing 210098, China.
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Kou X, Liu H, Chen H, Xu Z, Yu X, Cao X, Liu D, Wen L, Zhuo Y, Wang L. Multifunctionality and maintenance mechanism of wetland ecosystems in the littoral zone of the northern semi-arid region lake driven by environmental factors. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 870:161956. [PMID: 36737024 DOI: 10.1016/j.scitotenv.2023.161956] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 01/28/2023] [Accepted: 01/28/2023] [Indexed: 06/18/2023]
Abstract
The relationship between biodiversity and ecosystem multifunctionality (BEMF) has become an ecological research hot spot in recent years. Changes in biodiversity are non-randomly distributed in space and time in natural ecosystems, and the BEMF relationship is affected by a combination of biotic and abiotic factors. These complex, uncertain relationships are affected by research scale and quantification and measurement indicators. This paper took the Daihai littoral zone wetlands in Inner Mongolia as the research object to reveal the dynamic succession of wetland vegetation and ecosystem function change characteristics and processes during the shrinkage of the lake. The main findings were as follows: the combined effect of aboveground (species and functions) and belowground (bacteria and fungi) diversity was greater than the effect of single components on ecosystem multifunctionality (EMF) (R2 = 80.00 %). Soil salinity (EC) had a direct negative effect on EMF (λ = -0.22), and soil moisture (SM) had a direct positive effect on EMF (λ = 0.19). The results of the hierarchical partitioning analysis showed that plant species richness (Margalef index) was the ideal indicator to explain the EMF and C, N, and P cycling functions in littoral zone wetlands with explanations of 12.25 %, 7.31 %, 7.83 %, and 5.33 %, respectively. The EMF and C and P cycles were mainly affected by bacterial diversity, and the N cycle was mainly affected by fungal abundance in belowground biodiversity. Margalef index and sand content affected EMF through cascading effects of multiple nutrients (FDis, CWMRV, CWMLCC, and bacterial and fungal abundance and diversity) in littoral zone wetlands. This paper provides a reference for exploring the multifunctionality maintenance mechanisms of natural littoral zone wetland ecosystems in the context of global change, and it also provides important theoretical support and basic data for the implementation of ecological restoration in Daihai lake.
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Affiliation(s)
- Xin Kou
- School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China
| | - Huamin Liu
- School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China
| | - Han Chen
- School of Business Administration and Humanities, Mongolian University of Science & Technology, Ulaanbaatar 46/520, Mongolia
| | - Zhichao Xu
- School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China
| | - Xiaowen Yu
- School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China
| | - Xiaoai Cao
- School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China
| | - Dongwei Liu
- School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China
| | - Lu Wen
- School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China
| | - Yi Zhuo
- School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China
| | - Lixin Wang
- School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China; Collaborative Innovation Center for Grassland Ecological Security (Jointly Supported by the Ministry of Education of China and Inner Mongolia Autonomous Region), Hohhot 010021, China; Ministry of Education Key Laboratory of Ecology and Resource Use of the Mongolian Plateau, Hohhot 010021, China.
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Guo H, Zhou XB, Tao Y, Yin JF, Zhang L, Guo X, Liu CH, Zhang YM. Perennial herb diversity contributes more than annual herb diversity to multifunctionality in dryland ecosystems of North-western China. FRONTIERS IN PLANT SCIENCE 2023; 14:1099110. [PMID: 36890885 PMCID: PMC9986965 DOI: 10.3389/fpls.2023.1099110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Accepted: 02/03/2023] [Indexed: 06/18/2023]
Abstract
BACKGROUND Considerable attention has been given to how different aspects of biodiversity sustain ecosystem functions. Herbs are a critical component of the plant community of dryland ecosystems, but the importance of different life form groups of herbs is often overlooked in experiments on biodiversity-ecosystem multifunctionality. Hence, little is known about how the multiple attributes of diversity of different life form groups of herbs affect changes to the multifunctionality of ecosystems. METHODS We investigated geographic patterns of herb diversity and ecosystem multifunctionality along a precipitation gradient of 2100 km in Northwest China, and assessed the taxonomic, phylogenetic and functional attributes of different life form groups of herbs on the multifunctionality. RESULTS We found that subordinate (richness effect) species of annual herbs and dominant (mass ratio effect) species of perennial herbs were crucial for driving multifunctionality. Most importantly, the multiple attributes (taxonomic, phylogenetic and functional) of herb diversity enhanced the multifunctionality. The functional diversity of herbs provided greater explanatory power than did taxonomic and phylogenetic diversity. In addition, the multiple attribute diversity of perennial herbs contributed more than annual herbs to multifunctionality. CONCLUSIONS Our findings provide insights into previously neglected mechanisms by which the diversity of different life form groups of herbs affect ecosystem multifunctionality. These results provide a comprehensive understanding of the relationship between biodiversity and multifunctionality, and will ultimately contribute to multifunctional conservation and restoration programs in dryland ecosystems.
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Affiliation(s)
- Hao Guo
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Xiao-bing Zhou
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Ye Tao
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Jin-fei Yin
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Lan Zhang
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Xing Guo
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Chao-hong Liu
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, China
| | - Yuan-ming Zhang
- State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, China
- University of Chinese Academy of Sciences, Beijing, China
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Moi DA, Lansac-Tôha FM, Romero GQ, Sobral-Souza T, Cardinale BJ, Kratina P, Perkins DM, Teixeira de Mello F, Jeppesen E, Heino J, Lansac-Tôha FA, Velho LFM, Mormul RP. Human pressure drives biodiversity-multifunctionality relationships in large Neotropical wetlands. Nat Ecol Evol 2022; 6:1279-1289. [PMID: 35927315 DOI: 10.1038/s41559-022-01827-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Accepted: 06/13/2022] [Indexed: 01/09/2023]
Abstract
Many studies have shown that biodiversity regulates multiple ecological functions that are needed to maintain the productivity of a variety of ecosystem types. What is unknown is how human activities may alter the 'multifunctionality' of ecosystems through both direct impacts on ecosystems and indirect effects mediated by the loss of multifaceted biodiversity. Using an extensive database of 72 lakes spanning four large Neotropical wetlands in Brazil, we demonstrate that species richness and functional diversity across multiple larger (fish and macrophytes) and smaller (microcrustaceans, rotifers, protists and phytoplankton) groups of aquatic organisms are positively associated with ecosystem multifunctionality. Whereas the positive association between smaller organisms and multifunctionality broke down with increasing human pressure, this positive relationship was maintained for larger organisms despite the increase in human pressure. Human pressure impacted multifunctionality both directly and indirectly through reducing species richness and functional diversity of multiple organismal groups. These findings provide further empirical evidence about the importance of aquatic biodiversity for maintaining wetland multifunctionality. Despite the key role of biodiversity, human pressure reduces the diversity of multiple groups of aquatic organisms, eroding their positive impacts on a suite of ecological functions that sustain wetlands.
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Affiliation(s)
- Dieison A Moi
- Department of Biology (DBI), Center of Biological Sciences (CCB), State University of Maringá (UEM), Maringá, Brazil.
| | - Fernando M Lansac-Tôha
- Department of Biology (DBI), Center of Biological Sciences (CCB), State University of Maringá (UEM), Maringá, Brazil
| | - Gustavo Q Romero
- Laboratory of Multitrophic Interactions and Biodiversity, Department of Animal Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, Brazil
| | - Thadeu Sobral-Souza
- Department of Botany and Ecology, Institute of Bioscience, Federal University of Mato Grosso, Cuiabá, Brazil
| | - Bradley J Cardinale
- Department of Ecosystem Science and Management, Penn State University, University Park, PA, USA
| | - Pavel Kratina
- School of Biological and Behavioural Sciences, Queen Mary University of London, London, UK
| | - Daniel M Perkins
- School of Life and Health Sciences, University of Roehampton, Whitelands College, London, UK
| | - Franco Teixeira de Mello
- Departamento de Ecología y Gestión Ambiental CURE, Universidad de la República, Maldonado, Uruguay
| | - Erik Jeppesen
- Department of Ecoscience and WATEC, Aarhus University, Aarhus C, Denmark.,Sino-Danish Centre for Education and Research, Beijing, China.,Limnology Laboratory, Department of Biological Sciences and Centre for Ecosystem Research and Implementation, Middle East Technical University, Ankara, Turkey.,Institute of Marine Sciences, Middle East Technical University, Erdemli-Mersin, Turkey
| | - Jani Heino
- Freshwater Centre, Finnish Environment Institute, Oulu, Finland
| | - Fábio A Lansac-Tôha
- Department of Biology (DBI), Center of Biological Sciences (CCB), State University of Maringá (UEM), Maringá, Brazil.,Research Centre in Limnology, Ichthyology and Aquaculture (NUPÉLIA), Centre of Biological Sciences (CCB), State University of Maringá (UEM), Maringá, Brazil
| | - Luiz F M Velho
- Department of Biology (DBI), Center of Biological Sciences (CCB), State University of Maringá (UEM), Maringá, Brazil.,Research Centre in Limnology, Ichthyology and Aquaculture (NUPÉLIA), Centre of Biological Sciences (CCB), State University of Maringá (UEM), Maringá, Brazil.,UniCesumar/ICETI, Maringá, Brazil
| | - Roger P Mormul
- Department of Biology (DBI), Center of Biological Sciences (CCB), State University of Maringá (UEM), Maringá, Brazil.,Research Centre in Limnology, Ichthyology and Aquaculture (NUPÉLIA), Centre of Biological Sciences (CCB), State University of Maringá (UEM), Maringá, Brazil
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Moi DA, Teixeira-de-Mello F. Cascading impacts of urbanization on multitrophic richness and biomass stock in neotropical streams. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 806:151398. [PMID: 34742800 DOI: 10.1016/j.scitotenv.2021.151398] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 10/18/2021] [Accepted: 10/30/2021] [Indexed: 06/13/2023]
Abstract
The conversion of natural streams to urbanized systems with the intention of supplying the cities' water demand causes species loss across many trophic groups, with negative consequences for ecosystem functioning. High levels of watershed urbanization cause environmental changes through water quality deterioration and loss of habitat heterogeneity. However, it remains unclear how environmental changes resulting from urbanization affect the diversity of multiple trophic groups and ecosystem functions, such as biomass stock in streams. Here, using a dataset from Neotropical streams, we investigate the cascading effects of urbanization (via impoverishment of water quality and habitat heterogeneity) on richness of multiple trophic groups of fish, and their consequences to biomass stock of streams. The increase in urbanization decreased the richness and standing biomass of carnivores, omnivores, and detritivores across streams. Urbanization also decreased habitat heterogeneity and water quality, which driver a huge cascading decrease in the richness of carnivores, omnivores, and detritivores, and ultimately reduced the whole-community standing biomass. Our analysis revealed that urbanization expansion induces a cascading reduction of multitrophic diversity and standing biomass in Neotropical streams. Therefore, the predicted increase in urbanization in the coming decades should impacts the richness of multiple trophic levels, with potential negative consequences to ecosystem functioning of streams.
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Affiliation(s)
- Dieison André Moi
- Department of Biology, Graduate Program in Ecology of Inland Waters, Nupelia, University of Maringá, Av. Colombo 5790, Bloco H90, Jd. Universitário, Maringá, PR 87020-900, Brazil.
| | - Franco Teixeira-de-Mello
- Departamento de Ecología y Gestión Ambiental CURE, Universidad de la República, Tacuarembó s/n, Maldonado, Uruguay.
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Romero GQ, Moi DA, Nash LN, Antiqueira PAP, Mormul RP, Kratina P. Pervasive decline of subtropical aquatic insects over 20 years driven by water transparency, non-native fish and stoichiometric imbalance. Biol Lett 2021; 17:20210137. [PMID: 34102072 PMCID: PMC8187010 DOI: 10.1098/rsbl.2021.0137] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Accepted: 05/12/2021] [Indexed: 12/22/2022] Open
Abstract
Insect abundance and diversity are declining worldwide. Although recent research found freshwater insect populations to be increasing in some regions, there is a critical lack of data from tropical and subtropical regions. Here, we examine a 20-year monitoring dataset of freshwater insects from a subtropical floodplain comprising a diverse suite of rivers, shallow lakes, channels and backwaters. We found a pervasive decline in abundance of all major insect orders (Odonata, Ephemeroptera, Trichoptera, Megaloptera, Coleoptera, Hemiptera and Diptera) and families, regardless of their functional role or body size. Similarly, Chironomidae species richness decreased over the same time period. The main drivers of this pervasive insect decline were increased concurrent invasions of non-native insectivorous fish, water transparency and changes to water stoichiometry (i.e. N : P ratios) over time. All these drivers represent human impacts caused by reservoir construction. This work sheds light on the importance of long-term studies for a deeper understanding of human-induced impacts on aquatic insects. We highlight that extended anthropogenic impact monitoring and mitigation actions are pivotal in maintaining freshwater ecosystem integrity.
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Affiliation(s)
- Gustavo Q. Romero
- Laboratory of Multitrophic Interactions and Biodiversity, Department of Animal Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP 13083-862, Brazil
| | - Dieison A. Moi
- Graduate Program in Ecology of Inland Water Ecosystems (PEA), Department of Biology (DBI), Center of Biological Sciences (CCB), State University of Maringá (UEM), Brazil
| | - Liam N. Nash
- School of Biological and Chemical Sciences, Queen Mary University of London, Mile End Road, London E1 4NS, UK
| | - Pablo A. P. Antiqueira
- Laboratory of Multitrophic Interactions and Biodiversity, Department of Animal Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP 13083-862, Brazil
| | - Roger P. Mormul
- Graduate Program in Ecology of Inland Water Ecosystems (PEA), Department of Biology (DBI), Center of Biological Sciences (CCB), State University of Maringá (UEM), Brazil
| | - Pavel Kratina
- School of Biological and Chemical Sciences, Queen Mary University of London, Mile End Road, London E1 4NS, UK
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