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Gobry JJ, Bachwenkizi HS, Kimambo ON, Ngassapa FN, Kilulya KF. Occurrence of Harmful Algal Blooms in Freshwater Sources of Mindu and Nyumba ya Mungu Dams, Tanzania. J Toxicol 2023; 2023:5532962. [PMID: 37876836 PMCID: PMC10593555 DOI: 10.1155/2023/5532962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 09/05/2023] [Accepted: 09/13/2023] [Indexed: 10/26/2023] Open
Abstract
Harmful algal blooms (HABs) pose a significant threat to aquatic ecosystems and human health due to the production of toxins. The identification and quantification of these toxins are crucial for water quality management decisions. This study used DNA analysis (PCR techniques) to identify toxin-producing strains and liquid-chromatography-tandem mass spectrometry (LC-MS/MS) to quantify microcystins in samples from Mindu and Nyumba ya Mungu Dams in Tanzania. The results showed that HABs were detected in both dams. The BLAST results revealed that the 16S gene sequences of uncultured samples were very similar to an Antarctic cyanobacterium, Leptolyngbya sp, Anabaena sp, and Microcystis aeruginosa. Sequences of the cultured samples were most similar to Nodularia spumigena, Amazoninema brasiliense, Anabaena sp, and Microcystis aeruginosa. Further analyses showed that the nucleotide sequence similarity of uncultured isolates from this study and those from the GenBank ranged from 85 to 100%. For cultured isolates from this study and others from the GenBank, nucleotide identity ranged from 81 to 100%. The molecular identification of Microcystis aeruginosa confirmed the presence of HABs in both Mindu and Nyumba ya Mungu Dams in Tanzania. At Mindu Dam, the mean concentrations (± standard deviation) of microcystin-LR, -RR, and -YR were 1.08 ± 0.749 ppm, 0.120 ± 0.0211 ppm, and 1.37 ± 0.862 ppm, respectively. Similarly, at Nyumba ya Mungu Dam, the concentrations of microcystin-LR, -RR, and -YR were 1.07 ± 0.499 ppm, 0.124 ± 0.0224 ppm, and 0.961 ± 0.408 ppm, respectively. This paper represents the first application of PCR and LC-MS/MS to study microcystins in small freshwater reservoirs in Tanzania. This study confirms the presence of toxin-producing strains of Microcystis aeruginosa in both dams and also provides evidence of the occurrence of microcystins from these strains. These findings contribute in improving the monitoring of HABs contamination and their potential impact on water quality in Tanzanian reservoirs.
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Affiliation(s)
- Josephine J. Gobry
- Department of Chemistry, College of Natural and Applied Science, University of Dar es Salaam, P.O. Box 35061, Dar es Salaam, Tanzania
- Department of Water Resources, Water Institute, P.O. Box 35059, Dar es Salaam, Tanzania
| | - Hilda S. Bachwenkizi
- Tanzania Agricultural Research Institute, Mikocheni, P.O. Box 6226, Dar es Salaam, Tanzania
| | - Offoro N. Kimambo
- Department of Geography & Environmental Studies, Sokoine University of Agriculture, Morogoro, Tanzania
| | - Faustin N. Ngassapa
- Department of Chemistry, College of Natural and Applied Science, University of Dar es Salaam, P.O. Box 35061, Dar es Salaam, Tanzania
| | - Kessy F. Kilulya
- Department of Chemistry, College of Natural and Applied Science, University of Dar es Salaam, P.O. Box 35061, Dar es Salaam, Tanzania
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2
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Haase P, Bowler DE, Baker NJ, Bonada N, Domisch S, Garcia Marquez JR, Heino J, Hering D, Jähnig SC, Schmidt-Kloiber A, Stubbington R, Altermatt F, Álvarez-Cabria M, Amatulli G, Angeler DG, Archambaud-Suard G, Jorrín IA, Aspin T, Azpiroz I, Bañares I, Ortiz JB, Bodin CL, Bonacina L, Bottarin R, Cañedo-Argüelles M, Csabai Z, Datry T, de Eyto E, Dohet A, Dörflinger G, Drohan E, Eikland KA, England J, Eriksen TE, Evtimova V, Feio MJ, Ferréol M, Floury M, Forcellini M, Forio MAE, Fornaroli R, Friberg N, Fruget JF, Georgieva G, Goethals P, Graça MAS, Graf W, House A, Huttunen KL, Jensen TC, Johnson RK, Jones JI, Kiesel J, Kuglerová L, Larrañaga A, Leitner P, L'Hoste L, Lizée MH, Lorenz AW, Maire A, Arnaiz JAM, McKie BG, Millán A, Monteith D, Muotka T, Murphy JF, Ozolins D, Paavola R, Paril P, Peñas FJ, Pilotto F, Polášek M, Rasmussen JJ, Rubio M, Sánchez-Fernández D, Sandin L, Schäfer RB, Scotti A, Shen LQ, Skuja A, Stoll S, Straka M, Timm H, Tyufekchieva VG, Tziortzis I, Uzunov Y, van der Lee GH, Vannevel R, Varadinova E, Várbíró G, Velle G, Verdonschot PFM, Verdonschot RCM, Vidinova Y, Wiberg-Larsen P, Welti EAR. The recovery of European freshwater biodiversity has come to a halt. Nature 2023; 620:582-588. [PMID: 37558875 PMCID: PMC10432276 DOI: 10.1038/s41586-023-06400-1] [Citation(s) in RCA: 37] [Impact Index Per Article: 37.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Accepted: 07/04/2023] [Indexed: 08/11/2023]
Abstract
Owing to a long history of anthropogenic pressures, freshwater ecosystems are among the most vulnerable to biodiversity loss1. Mitigation measures, including wastewater treatment and hydromorphological restoration, have aimed to improve environmental quality and foster the recovery of freshwater biodiversity2. Here, using 1,816 time series of freshwater invertebrate communities collected across 22 European countries between 1968 and 2020, we quantified temporal trends in taxonomic and functional diversity and their responses to environmental pressures and gradients. We observed overall increases in taxon richness (0.73% per year), functional richness (2.4% per year) and abundance (1.17% per year). However, these increases primarily occurred before the 2010s, and have since plateaued. Freshwater communities downstream of dams, urban areas and cropland were less likely to experience recovery. Communities at sites with faster rates of warming had fewer gains in taxon richness, functional richness and abundance. Although biodiversity gains in the 1990s and 2000s probably reflect the effectiveness of water-quality improvements and restoration projects, the decelerating trajectory in the 2010s suggests that the current measures offer diminishing returns. Given new and persistent pressures on freshwater ecosystems, including emerging pollutants, climate change and the spread of invasive species, we call for additional mitigation to revive the recovery of freshwater biodiversity.
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Affiliation(s)
- Peter Haase
- Department of River Ecology and Conservation, Senckenberg Research Institute and Natural History Museum Frankfurt, Gelnhausen, Germany.
- Faculty of Biology, University of Duisburg-Essen, Essen, Germany.
| | - Diana E Bowler
- Department of Ecosystem Services, German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany
- Institute of Biodiversity, Friedrich Schiller University Jena, Jena, Germany
- Department of Ecosystem Services, Helmholtz Center for Environmental Research-UFZ, Leipzig, Germany
| | - Nathan J Baker
- Department of River Ecology and Conservation, Senckenberg Research Institute and Natural History Museum Frankfurt, Gelnhausen, Germany
- Laboratory of Evolutionary Ecology of Hydrobionts, Nature Research Centre, Vilnius, Lithuania
| | - Núria Bonada
- FEHM-Lab (Freshwater Ecology, Hydrology and Management), Department of Evolutionary Biology, Ecology and Environmental Sciences, Facultat de Biologia, Institut de Recerca de la Biodiversitat (IRBio), University of Barcelona, Barcelona, Spain
| | - Sami Domisch
- Department of Community and Ecosystem Ecology, Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB), Berlin, Germany
| | - Jaime R Garcia Marquez
- Department of Community and Ecosystem Ecology, Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB), Berlin, Germany
| | - Jani Heino
- Geography Research Unit, University of Oulu, Oulu, Finland
| | - Daniel Hering
- Faculty of Biology, University of Duisburg-Essen, Essen, Germany
| | - Sonja C Jähnig
- Department of Community and Ecosystem Ecology, Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB), Berlin, Germany
- Geography Department, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Astrid Schmidt-Kloiber
- Department of Water, Atmosphere and Environment, Institute of Hydrobiology and Aquatic Ecosystem Management, University of Natural Resources and Life Sciences, Vienna, Austria
| | - Rachel Stubbington
- School of Science and Technology, Nottingham Trent University, Nottingham, UK
| | - Florian Altermatt
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, Zurich, Switzerland
- Department of Aquatic Ecology, Eawag: Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, Switzerland
| | - Mario Álvarez-Cabria
- IHCantabria-Instituto de Hidráulica Ambiental de la Universidad de Cantabria, Santander, Spain
| | | | - David G Angeler
- Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Uppsala, Sweden
- IMPACT, The Institute for Mental and Physical Health and Clinical Translation, Deakin University, Geelong, Victoria, Australia
- Brain Capital Alliance, San Francisco, CA, USA
- School of Natural Resources, University of Nebraska-Lincoln, Lincoln, NE, USA
| | - Gaït Archambaud-Suard
- INRAE, UMR RECOVER Aix Marseille Univ, Centre d'Aix-en-Provence, Aix-en-Provence, France
| | | | | | | | - Iñaki Bañares
- Departamento de Medio Ambiente y Obras Hidráulicas, Diputación Foral de Gipuzkoa, Donostia-San Sebastián, Spain
| | - José Barquín Ortiz
- IHCantabria-Instituto de Hidráulica Ambiental de la Universidad de Cantabria, Santander, Spain
| | - Christian L Bodin
- LFI-The Laboratory for Freshwater Ecology and Inland Fisheries, NORCE Norwegian Research Centre, Bergen, Norway
| | - Luca Bonacina
- Department of Earth and Environmental Sciences-DISAT, University of Milano-Bicocca, Milan, Italy
| | - Roberta Bottarin
- Institute for Alpine Environment, Eurac Research, Bolzano, Italy
| | - Miguel Cañedo-Argüelles
- FEHM-Lab (Freshwater Ecology, Hydrology and Management), Department of Evolutionary Biology, Ecology and Environmental Sciences, Facultat de Biologia, Institut de Recerca de la Biodiversitat (IRBio), University of Barcelona, Barcelona, Spain
- FEHM-Lab, Institute of Environmental Assessment and Water Research (IDAEA), CSIC, Barcelona, Spain
| | - Zoltán Csabai
- Department of Hydrobiology, University of Pécs, Pécs, Hungary
- Department of Botany and Zoology, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Thibault Datry
- INRAE, UR RiverLy, Centre de Lyon-Villeurbanne, Villeurbanne, France
| | - Elvira de Eyto
- Fisheries Ecosystems Advisory Services, Marine Institute, Newport, Ireland
| | - Alain Dohet
- Environmental Research and Innovation Department, Luxembourg Institute of Science and Technology, Esch-sur-Alzette, Luxembourg
| | - Gerald Dörflinger
- Water Development Department, Ministry of Agriculture, Rural Development and Environment, Nicosia, Cyprus
| | - Emma Drohan
- Centre for Freshwater and Environmental Studies, Dundalk Institute of Technology, Dundalk, Ireland
| | - Knut A Eikland
- Norwegian Institute for Nature Research (NINA), Oslo, Norway
| | | | - Tor E Eriksen
- Norwegian Institute for Water Research, Oslo, Norway
| | - Vesela Evtimova
- Department of Aquatic Ecosystems, Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Maria J Feio
- Department of Life Sciences, University of Coimbra, Marine and Environmental Sciences Centre, ARNET, Coimbra, Portugal
| | - Martial Ferréol
- INRAE, UR RiverLy, Centre de Lyon-Villeurbanne, Villeurbanne, France
| | - Mathieu Floury
- Department of Community and Ecosystem Ecology, Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB), Berlin, Germany
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, ENTPE, UMR 5023 LEHNA, Villeurbanne, France
| | | | | | - Riccardo Fornaroli
- Department of Earth and Environmental Sciences-DISAT, University of Milano-Bicocca, Milan, Italy
| | - Nikolai Friberg
- Norwegian Institute for Water Research, Oslo, Norway
- Freshwater Biological Section, University of Copenhagen, Copenhagen, Denmark
- water@leeds, School of Geography, University of Leeds, Leeds, UK
| | | | - Galia Georgieva
- Department of Aquatic Ecosystems, Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Peter Goethals
- Department of Animal Sciences and Aquatic Ecology, Ghent University, Ghent, Belgium
| | - Manuel A S Graça
- Department of Life Sciences, University of Coimbra, Marine and Environmental Sciences Centre, ARNET, Coimbra, Portugal
| | - Wolfram Graf
- Department of Water, Atmosphere and Environment, Institute of Hydrobiology and Aquatic Ecosystem Management, University of Natural Resources and Life Sciences, Vienna, Austria
| | | | | | - Thomas C Jensen
- Norwegian Institute for Nature Research (NINA), Oslo, Norway
| | - Richard K Johnson
- Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - J Iwan Jones
- School of Biological and Behavioural Sciences, Queen Mary University of London, London, UK
| | - Jens Kiesel
- Department of Community and Ecosystem Ecology, Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB), Berlin, Germany
- Department of Hydrology and Water Resources Management, Christian-Albrechts-University Kiel, Institute for Natural Resource Conservation, Kiel, Germany
| | - Lenka Kuglerová
- Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, Umeå, Sweden
| | - Aitor Larrañaga
- Department of Plant Biology and Ecology, University of the Basque Country, Leioa, Spain
| | - Patrick Leitner
- Department of Water, Atmosphere and Environment, Institute of Hydrobiology and Aquatic Ecosystem Management, University of Natural Resources and Life Sciences, Vienna, Austria
| | - Lionel L'Hoste
- Environmental Research and Innovation Department, Luxembourg Institute of Science and Technology, Esch-sur-Alzette, Luxembourg
| | - Marie-Helène Lizée
- INRAE, UMR RECOVER Aix Marseille Univ, Centre d'Aix-en-Provence, Aix-en-Provence, France
| | - Armin W Lorenz
- Faculty of Biology, University of Duisburg-Essen, Essen, Germany
| | - Anthony Maire
- Laboratoire National d'Hydraulique et Environnement, EDF Recherche et Développement, Chatou, France
| | | | - Brendan G McKie
- Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Andrés Millán
- Department of Ecology and Hydrology, University of Murcia, Murcia, Spain
| | - Don Monteith
- UK Centre for Ecology & Hydrology, Lancaster Environment Centre, Lancaster, UK
| | - Timo Muotka
- Department of Ecology and Genetics, University of Oulu, Oulu, Finland
| | - John F Murphy
- School of Biological and Behavioural Sciences, Queen Mary University of London, London, UK
| | - Davis Ozolins
- Institute of Biology, University of Latvia, Riga, Latvia
| | - Riku Paavola
- Oulanka Research Station, University of Oulu Infrastructure Platform, Kuusamo, Finland
| | - Petr Paril
- Department of Botany and Zoology, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Francisco J Peñas
- IHCantabria-Instituto de Hidráulica Ambiental de la Universidad de Cantabria, Santander, Spain
| | | | - Marek Polášek
- Department of Botany and Zoology, Faculty of Science, Masaryk University, Brno, Czech Republic
| | | | - Manu Rubio
- Ekolur Asesoría Ambiental SLL, Oiartzun, Spain
| | | | - Leonard Sandin
- Norwegian Institute for Nature Research (NINA), Oslo, Norway
| | - Ralf B Schäfer
- Institute for Environmental Science, RPTU Kaiserslautern-Landau, Landau, Germany
| | - Alberto Scotti
- Institute for Alpine Environment, Eurac Research, Bolzano, Italy
- APEM, Stockport, UK
| | - Longzhu Q Shen
- Department of Community and Ecosystem Ecology, Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB), Berlin, Germany
- Institute for Green Science, Carnegie Mellon University, Pittsburgh, PA, USA
| | - Agnija Skuja
- Institute of Biology, University of Latvia, Riga, Latvia
| | - Stefan Stoll
- Faculty of Biology, University of Duisburg-Essen, Essen, Germany
- Department of Environmental Planning / Environmental Technology, University of Applied Sciences Trier, Birkenfeld, Germany
| | - Michal Straka
- Department of Botany and Zoology, Faculty of Science, Masaryk University, Brno, Czech Republic
- T.G. Masaryk Water Research Institute, Brno, Czech Republic
| | - Henn Timm
- Chair of Hydrobiology and Fishery, Centre for Limnology, Estonian University of Life Sciences, Elva vald, Estonia
| | - Violeta G Tyufekchieva
- Department of Aquatic Ecosystems, Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Iakovos Tziortzis
- Water Development Department, Ministry of Agriculture, Rural Development and Environment, Nicosia, Cyprus
| | - Yordan Uzunov
- Department of Aquatic Ecosystems, Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Gea H van der Lee
- Wageningen Environmental Research, Wageningen University and Research, Wageningen, The Netherlands
| | - Rudy Vannevel
- Department of Animal Sciences and Aquatic Ecology, Ghent University, Ghent, Belgium
- Flanders Environment Agency, Aalst, Belgium
| | - Emilia Varadinova
- Department of Aquatic Ecosystems, Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, Sofia, Bulgaria
- Department of Geography, Ecology and Environment Protection, Faculty of Mathematics and Natural Sciences, South-West University 'Neofit Rilski', Blagoevgrad, Bulgaria
| | - Gábor Várbíró
- Department of Tisza River Research, Centre for Ecological Research, Institute of Aquatic Ecology, Debrecen, Hungary
| | - Gaute Velle
- LFI-The Laboratory for Freshwater Ecology and Inland Fisheries, NORCE Norwegian Research Centre, Bergen, Norway
- Department of Biological Sciences, University of Bergen, Bergen, Norway
| | - 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
| | - Yanka Vidinova
- Department of Aquatic Ecosystems, Institute of Biodiversity and Ecosystem Research, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | | | - Ellen A R Welti
- Department of River Ecology and Conservation, Senckenberg Research Institute and Natural History Museum Frankfurt, Gelnhausen, Germany.
- Conservation Ecology Center, Smithsonian National Zoo and Conservation Biology Institute, Front Royal, VA, USA.
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3
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Musseau CL, Onandia G, Petermann JS, Sagouis A, Lischeid G, Jeschke JM. Nonlinear effects of environmental drivers shape macroinvertebrate biodiversity in an agricultural pondscape. Ecol Evol 2022; 12:e9458. [PMID: 36381394 PMCID: PMC9643126 DOI: 10.1002/ece3.9458] [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: 07/12/2022] [Revised: 10/05/2022] [Accepted: 10/10/2022] [Indexed: 11/11/2022] Open
Abstract
Agriculture is a leading cause of biodiversity loss and significantly impacts freshwater biodiversity through many stressors acting locally and on the landscape scale. The individual effects of these numerous stressors are often difficult to disentangle and quantify, as they might have nonlinear impacts on biodiversity. Within agroecosystems, ponds are biodiversity hotspots providing habitat for many freshwater species and resting or feeding places for terrestrial organisms. Ponds are strongly influenced by their terrestrial surroundings, and understanding the determinants of biodiversity in agricultural landscapes remains difficult but crucial for improving conservation policies and actions. We aimed to identify the main effects of environmental and spatial variables on α-, β-, and γ-diversities of macroinvertebrate communities inhabiting ponds (n = 42) in an agricultural landscape in the Northeast Germany, and to quantify the respective roles of taxonomic turnover and nestedness in the pondscape. We disentangled the nonlinear effects of a wide range of environmental and spatial variables on macroinvertebrate α- and β-biodiversity. Our results show that α-diversity is impaired by eutrophication (phosphate and nitrogen) and that overshaded ponds support impoverished macroinvertebrate biota. The share of arable land in the ponds' surroundings decreases β-diversity (i.e., dissimilarity in community), while β-diversity is higher in shallower ponds. Moreover, we found that β-diversity is mainly driven by taxonomic turnover and that ponds embedded in arable fields support local and regional diversity. Our findings highlight the importance of such ponds for supporting biodiversity, identify the main stressors related to human activities (eutrophication), and emphasize the need for a large number of ponds in the landscape to conserve biodiversity. Small freshwater systems in agricultural landscapes challenge us to compromise between human demands and nature conservation worldwide. Identifying and quantifying the effects of environmental variables on biodiversity inhabiting those ecosystems can help address threats impacting freshwater life with more effective management of pondscapes.
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Affiliation(s)
- Camille L. Musseau
- Institute of BiologyFreie Universität BerlinBerlinGermany
- Berlin‐Brandenburg Institute of Advanced Biodiversity ResearchBerlinGermany
- Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB)BerlinGermany
| | - Gabriela Onandia
- Berlin‐Brandenburg Institute of Advanced Biodiversity ResearchBerlinGermany
- Leibniz Centre for Agricultural Landscape Research (ZALF)MünchebergGermany
| | - Jana S. Petermann
- Berlin‐Brandenburg Institute of Advanced Biodiversity ResearchBerlinGermany
- Department of Environment and BiodiversityUniversity of SalzburgSalzburgAustria
| | - Alban Sagouis
- Institute of BiologyFreie Universität BerlinBerlinGermany
- Berlin‐Brandenburg Institute of Advanced Biodiversity ResearchBerlinGermany
- German Centre for Integrative Biodiversity Research (iDiv) Halle‐Jena‐LeipzigLeipzigGermany
- Department of Computer ScienceMartin Luther University, Halle‐WittenbergHalleGermany
| | - Gunnar Lischeid
- Berlin‐Brandenburg Institute of Advanced Biodiversity ResearchBerlinGermany
- Leibniz Centre for Agricultural Landscape Research (ZALF)MünchebergGermany
- Institute for Environmental Sciences and GeographyUniversity of PotsdamPotsdamGermany
| | - Jonathan M. Jeschke
- Institute of BiologyFreie Universität BerlinBerlinGermany
- Berlin‐Brandenburg Institute of Advanced Biodiversity ResearchBerlinGermany
- Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB)BerlinGermany
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Jiang X, Sun X, Alahuhta J, Heino J, Xie Z. Responses of multiple facets of macroinvertebrate alpha diversity to eutrophication in floodplain lakes. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 306:119410. [PMID: 35525517 DOI: 10.1016/j.envpol.2022.119410] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 03/23/2022] [Accepted: 05/01/2022] [Indexed: 06/14/2023]
Abstract
The accelerated eutrophication of freshwater lakes has become an environmental problem worldwide. Increasing numbers of studies highlight the need to incorporate functional and phylogenetic information of species into bioassessment programms, but it is still poorly understood how eutrophication affects multiple diversity facets of freshwater communities. Here, we assessed the responses of taxonomic, phylogenetic and functional diversity of benthic macroinvertebrates to water eutrophication in 33 lakes in the Yangtze River floodplain in China. Our results showed that macroinvertebrate assemblage structure was significantly different among four lake groups (river-connected, macrophyte-dominated, macrophyte-algae transition, and algae-dominated). Three taxonomic, two phylogenetic and two functional diversity indices were significantly different among the lake groups. Except for the increasing trend of Lambda+, these metrics showed a clear decreasing trend with increasing levels of eutrophication, with highest values detected in river-connected and macrophyte-dominated lakes, followed by macrophyte-algae transition lakes and algal-dominated lakes. Although differing in the number and identity of key environmental and spatial variables among the explanatory models of different diversity indices, environmental factors (eutrophication-related water quality variables) played more important role than spatial factors in structuring all three facets of alpha diversity. The predominant role of environmental filtering can be attributed to the strong eutrophication gradient across the studied lakes. Among the three diversity facets, functional diversity indices performed best in portraying anthropogenic disturbances, with variations in these indices being solely explained by environmental factors. Spatial factors were mostly weak or negligible in accounting for the variation in functional diversity indices, implying that trait-based indices are robust in portraying anthropogenic eutrophication in floodplain lakes. However, variation in some taxonomic and phylogenetic diversity indices were also affected by spatial factors, indicating that conservation practitioners and environmental managers should use these metrics with caution when providing solutions for addressing eutrophication in floodplain lakes.
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Affiliation(s)
- Xiaoming Jiang
- State Key Laboratory of Eco-hydraulic in Northwest Arid Region of China, Xi'an University of Technology, Xi'an, 710048, Shaanxi, China; CAS Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China
| | - Xing Sun
- State Key Laboratory of Eco-hydraulic in Northwest Arid Region of China, Xi'an University of Technology, Xi'an, 710048, Shaanxi, China
| | - Janne Alahuhta
- Geography Research Unit, University of Oulu, P. O. Box 8000, FI-90014, Oulu, Finland
| | - Jani Heino
- Freshwater Centre, Finnish Environment Institute, Paavo Havaksen Tie 3, P.O. Box 413, FI-90014, Oulu, Finland
| | - Zhicai Xie
- CAS Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China.
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5
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Li Y, Shen R, Liu X, Su H, Wu F, Chen F. Impacts of nutrient reduction on temporal β-diversity of rotifers: A 19-year limnology case study on Lake Wuli, China. WATER RESEARCH 2022; 216:118364. [PMID: 35367940 DOI: 10.1016/j.watres.2022.118364] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 03/23/2022] [Accepted: 03/24/2022] [Indexed: 06/14/2023]
Abstract
There have been many studies on the effects of eutrophication on beta diversity (β-diversity) of species assemblages. However, few studies have focused on the effects of nutrient reduction on β-diversity and community structure, and long-time series analyses are particularly scarce. We conducted a 19-year case study on the impacts of management intervention on the temporal β-diversity of aquatic grazers in a lake at the Yangtze River Basin. In our study, we compared the changes in temporal β-diversity as well as its two components, nestedness and turnover, and the synchrony of the rotifer community after management intervention. Our results showed that while the abundance of some sensitive species increased, there was no trend in species richness. Moreover, both the seasonality and interannual stabilities of rotifer assemblages increased. The species synchrony decreased in both spring and summer after management intervention. We also found that management intervention significantly reduced nutrient concentrations but not water clarity and phytoplankton abundance. The total nitrogen (TN): total phosphorous (TP) ratio was reduced after management intervention, causing an increase in the abundance of cyanobacteria that may contribute to the increase of rotifer synchrony in autumn. Our results imply that stable environmental fluctuations after management intervention may increase temporal β-diversity and stability of herbivorous assemblages. However, imbalanced changes in TN and TP after management intervention may weaken the top-down control of zooplankton on phytoplankton and slow down water clarity improvement.
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Affiliation(s)
- Yun Li
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China.
| | - Ruijie Shen
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
| | - Xia Liu
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
| | - Haojie Su
- Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming 650091, China
| | - Fuqin Wu
- Yunnan Institute of Forest Inventory and Planning, Kunming 650051, China
| | - Feizhou Chen
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China.
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6
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Li Y, Geng M, Yu J, Du Y, Xu M, Zhang W, Wang J, Su H, Wang R, Chen F. Eutrophication decrease compositional dissimilarity in freshwater plankton communities. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 821:153434. [PMID: 35090915 DOI: 10.1016/j.scitotenv.2022.153434] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2021] [Revised: 01/19/2022] [Accepted: 01/22/2022] [Indexed: 06/14/2023]
Abstract
Human activities, such as land use change and eutrophication, threaten freshwater biodiversity and ecosystem function. In this study, we examined both the α- and β-diversity of plankton communities, that is, bacteria/prokaryotic algae, eukaryotic algae, and zooplankton/metazoans, using both classical microscopy and high-throughput sequencing methods across 40 lakes of the Yangtze River Basin. The spatial variations in plankton communities were explained by environmental variables such as trophic status index (TSI) and environmental heterogeneity according to non-metric multidimensional scaling analyses, mantel tests, and structural equation model. Our results showed that the compositional dissimilarities of bacteria, cyanobacteria, eukaryotic algae, and metazoans all decreased with the increasing TSI values, and were significantly positively related to environmental dissimilarity. Both the species richness and compositional dissimilarity of zooplankton had positive effects on zooplankton/phytoplankton biomass ratio. Zooplankton diversity was not directly affected by TSI and environmental dissimilarity; however, it was indirectly affected by the biotic interactions with cyanobacteria or eukaryotic algae. In addition, there were significant positive relationships between bacteria/cyanobacteria and eukaryotic algae dissimilarities. Our results indicated that increased trophic status and decreased environmental dissimilarity as consequences of eutrophication may weaken the trophic cascading effects of planktonic food chain via reducing the top-down effects of zooplankton on phytoplankton.
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Affiliation(s)
- Yun Li
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
| | - Mengdie Geng
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China
| | - Jinlei Yu
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
| | - Yingxun Du
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
| | - Min Xu
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
| | - Weizhen Zhang
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
| | - Jianjun Wang
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Haojie Su
- Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming 650091, China
| | - Rong Wang
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China.
| | - Feizhou Chen
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China.
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7
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Stelzer JAA, Mesman JP, Gsell AS, Senerpont Domis LN, Visser PM, Adrian R, Ibelings BW. Phytoplankton responses to repeated pulse perturbations imposed on a trend of increasing eutrophication. Ecol Evol 2022; 12:e8675. [PMID: 35261753 PMCID: PMC8888247 DOI: 10.1002/ece3.8675] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Revised: 01/28/2022] [Accepted: 02/08/2022] [Indexed: 11/10/2022] Open
Affiliation(s)
- Julio A. A. Stelzer
- Department F.‐A Forel for Environmental and Aquatic Sciences Institute for Environmental Sciences University of Geneva Geneva Switzerland
- Department of Ecosystem Research Leibniz‐Institute of Freshwater Ecology and Inland Fisheries Berlin Germany
- Department of Biology, Chemistry, and Pharmacy Freie Universität Berlin Berlin Germany
- Department of Aquatic Ecology Netherlands Institute of Ecology (NIOO‐KNAW) Wageningen The Netherlands
| | - Jorrit P. Mesman
- Department F.‐A Forel for Environmental and Aquatic Sciences Institute for Environmental Sciences University of Geneva Geneva Switzerland
- Department of Ecology and Genetics Uppsala University Uppsala Sweden
| | - Alena S. Gsell
- Department of Aquatic Ecology Netherlands Institute of Ecology (NIOO‐KNAW) Wageningen The Netherlands
| | | | - Petra M. Visser
- Department of Freshwater and Marine Ecology Institute for Biodiversity and Ecosystem Dynamics University of Amsterdam Amsterdam The Netherlands
| | - Rita Adrian
- Department of Ecosystem Research Leibniz‐Institute of Freshwater Ecology and Inland Fisheries Berlin Germany
- Department of Biology, Chemistry, and Pharmacy Freie Universität Berlin Berlin Germany
| | - Bastiaan W. Ibelings
- Department F.‐A Forel for Environmental and Aquatic Sciences Institute for Environmental Sciences University of Geneva Geneva Switzerland
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8
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Hill MJ, Greaves HM, Sayer CD, Hassall C, Milin M, Milner VS, Marazzi L, Hall R, Harper LR, Thornhill I, Walton R, Biggs J, Ewald N, Law A, Willby N, White JC, Briers RA, Mathers KL, Jeffries MJ, Wood PJ. Pond ecology and conservation: research priorities and knowledge gaps. Ecosphere 2021. [DOI: 10.1002/ecs2.3853] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Affiliation(s)
- Matthew J. Hill
- School of Applied Sciences University of Huddersfield Queensgate Huddersfield HD1 3DH UK
| | - Helen M. Greaves
- Pond Restoration Group Environmental Change Research Centre Department of Geography University College London Gower Street London WC1E 6BT UK
| | - Carl D. Sayer
- Pond Restoration Group Environmental Change Research Centre Department of Geography University College London Gower Street London WC1E 6BT UK
| | - Christopher Hassall
- School of Biology Faculty of Biological Sciences University of Leeds Woodhouse Lane Leeds LS2 9JT UK
| | - Mélanie Milin
- School of Applied Sciences University of Huddersfield Queensgate Huddersfield HD1 3DH UK
| | - Victoria S. Milner
- School of Applied Sciences University of Huddersfield Queensgate Huddersfield HD1 3DH UK
| | - Luca Marazzi
- Institute of Environment Florida International University Miami FL 33199 USA
| | - Ruth Hall
- Natural England Mail Hub, Natural England Worcester County Hall Spetchley Road Worcester WR5 2NP UK
| | - Lynsey R. Harper
- School of Biological and Environmental Sciences Liverpool John Moores University Liverpool L3 3AF UK
| | - Ian Thornhill
- School of Sciences Bath Spa University Newton St. Loe Bath BA2 9BN UK
| | - Richard Walton
- School of Geography, Politics and Sociology Newcastle University King’s Gate Newcastle upon Tyne NE1 7RU UK
| | - Jeremy Biggs
- Freshwater Habitats Trust Bury Knowle House Headington, Oxford OX3 9HY UK
| | - Naomi Ewald
- Freshwater Habitats Trust Bury Knowle House Headington, Oxford OX3 9HY UK
| | - Alan Law
- Biological and Environmental Sciences University of Stirling Stirling FK9 4LA UK
| | - Nigel Willby
- Biological and Environmental Sciences University of Stirling Stirling FK9 4LA UK
| | - James C. White
- River Restoration Centre Cranfield University Cranfield Bedfordshire MK43 0AL UK
| | - Robert A. Briers
- School of Applied Sciences Edinburgh Napier University Edinburgh EH11 4BN UK
| | - Kate L. Mathers
- Department of Surface Waters Research and Management Kastanienbaum 6047 Switzerland
- Centre for Hydrological and Ecosystem Science Department of Geography Loughborough University Loughborough Leicestershire LE11 3TU UK
| | - Michael J. Jeffries
- Department of Geography and Environmental Sciences Northumbria University Newcastle upon Tyne NE1 8ST UK
| | - Paul J. Wood
- Centre for Hydrological and Ecosystem Science Department of Geography Loughborough University Loughborough Leicestershire LE11 3TU UK
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9
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Szpakowska B, Świerk D, Pajchrowska M, Gołdyn R. Verifying the usefulness of macrophytes as an indicator of the status of small waterbodies. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 798:149279. [PMID: 34340089 DOI: 10.1016/j.scitotenv.2021.149279] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 07/22/2021] [Accepted: 07/22/2021] [Indexed: 06/13/2023]
Abstract
Small waterbodies are characterised by a high variability of physicochemical parameters. This has an impact on aquatic macrophytes, which are functional components of aquatic ecosystems that also exert a strong influence on other components of these ecosystems. Therefore, their importance in the classification of reservoirs is unquestionable. Unfortunately, the hydromacrophytes found in nutrient-rich small waterbodies in rural areas have a fairly wide ecological scale and are not suitable for a more accurate assessment of these reservoirs. In addition, indicators derived from the classification of lakes, such as phosphorus, nitrogen, chlorophyll-a, organic matter and trophic state indices, have turned out to be of little use in the assessment of small waterbodies. Only a canonical analysis taking into account both environmental variables and the occurring plant species allows satisfactory results to be obtained. Six small waterbodies located in the rural landscape of the Greater Poland Region were studied over three years. 115 plant taxa, 15 of which are hydromacrophytes, were found in the reservoirs and in their immediate vicinity. Three types of small waterbodies were identified in the CCA assessment: (i) those with high TOC, COD and ammonium nitrogen contents, dominated by pleustophytes, and in a saprotrophic state, (ii) those with high nutrient concentrations, dominated by phytoplankton, with a lack of macrophytes or with nymphaeids present, and in a hypereutrophic state, and (iii) those dominated by submerged macrophytes with low chlorophyll-a content, and in a eutrophic state. Thus, macrophytes turn out to be good indicators which support other variables in the classification of small waterbodies.
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Affiliation(s)
- Barbara Szpakowska
- Department of Landscape Architecture, Poznań University of Life Sciences, Dąbrowskiego 159, 60-594 Poznań, Poland
| | - Dariusz Świerk
- Department of Landscape Architecture, Poznań University of Life Sciences, Dąbrowskiego 159, 60-594 Poznań, Poland.
| | - Maria Pajchrowska
- Department of Landscape Architecture, Poznań University of Life Sciences, Dąbrowskiego 159, 60-594 Poznań, Poland
| | - Ryszard Gołdyn
- Department of Water Protection, Faculty of Biology, Adam Mickiewicz University, Uniwersytetu Poznańskiego 6, 61-614 Poznań, Poland
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10
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Wang H, García Molinos J, Heino J, Zhang H, Zhang P, Xu J. Eutrophication causes invertebrate biodiversity loss and decreases cross-taxon congruence across anthropogenically-disturbed lakes. ENVIRONMENT INTERNATIONAL 2021; 153:106494. [PMID: 33882434 DOI: 10.1016/j.envint.2021.106494] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 02/24/2021] [Accepted: 02/26/2021] [Indexed: 06/12/2023]
Abstract
Eutrophication is a major problem currently impacting many surface water ecosystems. Impacts of increased nutrient concentrations on biodiversity may differ between different scales, different organism groups, and different trophic states. Surveys at different spatial scales have suggested that biodiversity of different taxa may exhibit significant cross-taxon congruence. In our study, we examined the diversity of zooplankton and zoobenthos across 261 lakes in the Lake Taihu watershed, an area that is undergoing a severe eutrophication process. We tested the cross-taxon congruence in species richness and Shannon-Wiener diversity between zooplankton and zoobenthos along a nutrient gradient across the lakes. Our findings were consistent with the intermediate disturbance hypothesis, considering nutrient input as the disturbance. Also, we found significant cross-taxon congruence between zooplankton and zoobenthos diversities. Our results confirmed that excess nutrient levels resulted in diversity loss and community simplification. Zoobenthos were more sensitive to nutrient increases compared with zooplankton, which decreased cross-taxon congruence because these organism groups did not respond similarly to the anthropogenic disturbance.
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Affiliation(s)
- Huan Wang
- Institute of Hydrobiology, Chinese Academy of Science, Wuhan 430072, China
| | - Jorge García Molinos
- Arctic Research Center, Hokkaido University, N21W11, Kita-ku, Sapporo, Hokkaido 001-0021, Japan; Global Station for Arctic Research, Global Institution for Collaborative Research and Education, Hokkaido University, Sapporo 001-0021, Japan; Graduate School of Environmental Science, Hokkaido University, Sapporo 060-0810, Japan
| | - Jani Heino
- Finnish Environment Institute, Freshwater Centre, P.O. Box 413, FI-90014 Oulu, Finland
| | - Huan Zhang
- Institute of Hydrobiology, Chinese Academy of Science, Wuhan 430072, China.
| | - Peiyu Zhang
- Institute of Hydrobiology, Chinese Academy of Science, Wuhan 430072, China.
| | - Jun Xu
- Institute of Hydrobiology, Chinese Academy of Science, Wuhan 430072, China.
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11
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Zamora-Marín JM, Ilg C, Demierre E, Bonnet N, Wezel A, Robin J, Vallod D, Calvo JF, Oliva-Paterna FJ, Oertli B. Contribution of artificial waterbodies to biodiversity: A glass half empty or half full? THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 753:141987. [PMID: 32911169 DOI: 10.1016/j.scitotenv.2020.141987] [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: 06/05/2020] [Revised: 08/24/2020] [Accepted: 08/24/2020] [Indexed: 06/11/2023]
Abstract
Artificial ponds are increasingly created for the services they provide to humans. While they have the potential to offer habitats for freshwater biodiversity, their contribution to regional diversity has hardly been quantified. In this study, we assess the relative contribution of five types of artificial ponds to regional biodiversity of five different regions, studying amphibians, water beetles and freshwater snails. This biodiversity is also compared with that observed in natural ponds from three of the investigated regions. Our results indicate that artificial ponds host, on average, about 50% of the regional pool of lentic species. When compared to natural ponds, the artificial ponds always supported a substantially lower alpha richness (54% of the natural pond richness). The invertebrate communities presented high values of beta diversity and were represented by a restricted set of widely distributed species, and by numerous rare species. There were discrepancies among the taxonomic groups: overall, amphibians benefited most from the presence of artificial ponds, since 65% of the regional lentic species pools for this group was found in artificial ponds, whereas 43% and 42% was observed in the case of beetles and snails, respectively. However, each invertebrate group was promptly the most benefited animal group in a single pond type. Therefore, artificial pond types were complementary among them in terms of contribution to regional diversity of the three animal groups. Based on these results, we forecast that future human-dominated landscapes in which most ponds are artificial will be particularly impoverished in terms of freshwater biodiversity, underlining the need to conserve existing natural ponds and to create new "near-natural" ponds. However, if properly designed and managed, artificial ponds could make a substantial contribution to support freshwater biodiversity at a regional scale. Furthermore, the number and diversity of artificial ponds must be high in each considered landscape.
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Affiliation(s)
- Jose Manuel Zamora-Marín
- Department of Zoology and Physical Anthropology, Faculty of Biology, University of Murcia, Murcia, Spain.
| | - Christiane Ilg
- VSA, Swiss Water Association, Center of Competence for Surface Water Quality, 8600 Dübendorf, Switzerland
| | - Eliane Demierre
- University of Applied Sciences and Arts Western Switzerland, HEPIA, 1254 Jussy, Geneva, Switzerland
| | - Nelly Bonnet
- University of Applied Sciences and Arts Western Switzerland, HEPIA, 1254 Jussy, Geneva, Switzerland
| | - Alexander Wezel
- ISARA, AgroSchool for Life, Agroecology and Environment Research Unit, 23 Rue Jean Baldassini, 69364 Lyon, France
| | - Joël Robin
- ISARA, AgroSchool for Life, Agroecology and Environment Research Unit, 23 Rue Jean Baldassini, 69364 Lyon, France
| | - Dominique Vallod
- ISARA, AgroSchool for Life, Agroecology and Environment Research Unit, 23 Rue Jean Baldassini, 69364 Lyon, France
| | - José Francisco Calvo
- Department of Ecology and Hydrology, Faculty of Biology, University of Murcia, Murcia, Spain
| | | | - Beat Oertli
- University of Applied Sciences and Arts Western Switzerland, HEPIA, 1254 Jussy, Geneva, Switzerland
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12
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Zhang Z, Liu Y, Hu S, Wang J, Qian J. A New Type of Ecological Floating Bed Based on Ornamental Plants Experimented in an Artificially Made Eutrophic Water Body in the Laboratory for Nutrient Removal. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2021; 106:2-9. [PMID: 33433631 DOI: 10.1007/s00128-020-03086-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Accepted: 12/14/2020] [Indexed: 06/12/2023]
Abstract
In this study, a new type of ecological floating bed (NT-EFB) employing ornamental plants (either Spathiphyllum floribundum, Hydrocotyle sibthorpioids, Chlorophytum comosum or Peperomia obtusifolia) was designed to purify confected eutrophic water for 39 days. The growth characteristics of the plants and the effect of water treatment were analyzed and compared. The results showed that: (1) all the four ornamental plants examined survived well in the eutrophic water and an increase of plant biomass was observed; (2) the degradation efficiency of TOC by adding plants was about 85.0%; (3) the removal rate of NH4+-N was about 97.0%; (4) all the four plants can be used as floating bed plants to treat eutrophic water and Hydrocotyle sibthorpioids had the best growth characteristics and treatment efficiency. The study provides an adequate reference for the treatment of eutrophication using ecological floating beds.
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Affiliation(s)
- Zerui Zhang
- School of Mechanical Engineering, Hefei University of Technology, Hefei, 230009, Anhui, China
| | - Yajing Liu
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, 230009, Anhui, China
| | - Shuheng Hu
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, 230009, Anhui, China.
| | - Jiaquan Wang
- School of Mechanical Engineering, Hefei University of Technology, Hefei, 230009, Anhui, China
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, 230009, Anhui, China
| | - Jiazhong Qian
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, 230009, Anhui, China.
- Key Laboratory of Nanominerals and Pollution Control of Anhui Higher Education Institutes, Hefei University of Technology, Hefei, 230009, Anhui, China.
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13
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Ji L, Jiang X, Liu C, Xu Z, Wang J, Qian S, Zhou H. Response of traditional and taxonomic distinctness diversity indices of benthic macroinvertebrates to environmental degradation gradient in a large Chinese shallow lake. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:21804-21815. [PMID: 32281066 DOI: 10.1007/s11356-020-08610-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2019] [Accepted: 03/26/2020] [Indexed: 06/11/2023]
Abstract
A variety of biodiversity metrics are available to assess the quality of aquatic ecosystems. However, different types of metrics perform with considerable variation and provide various information involved in ecosystem conditions. Taxonomic distinctness (TD) indices have been recommended as desirable measures for assessing environmental degradation, but their utility based on lake macroinvertebrates is still largely unknown. Here, we evaluated the response of traditional and taxonomic distinctness diversity indices (the average taxonomic distinctness, Δ+, and variation in taxonomic distinctness, Λ+) of benthic macroinvertebrates to environmental degradation gradient in Lake Taihu, the third largest freshwater lake in China. Benthic assemblages responded markedly to human disturbances, with significance among-region differences in community composition throughout four seasons. The traditional biodiversity indices (Shannon-Wiener diversity and Pielou's evenness) showed high sensitivity in discriminating anthropogenic impacts, with highest values in macrophytic region but lowest values in eutrophic region. In contrast, Δ+ and Λ+ did not perform well in distinguishing sites subjected to different disturbance levels. The Pearson correlation and multiple regression analysis both indicated that traditional biodiversity metrics (Shannon-Wiener diversity, taxon richness, and Pielou's evenness) responded more readily to water quality variables (Secchi depth, electrical conductivity, and comprehensive trophic level index) than Δ+ and Λ+. Despite the weak correlations between TD indices of benthic macroinvertebrates and water quality in the present study, we suggest that the TD indices should still be considered in bioassessment programs because they provide useful complementary information on traditional diversity indices.
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Affiliation(s)
- Lei Ji
- Key Laboratory of Resource and Plant Biology of Anhui Province, College of Life Science, Huaibei Normal University, Huaibei, 235000, People's Republic of China
| | - Xiaoming Jiang
- State Key Laboratory of Eco-hydraulic in Northwest Arid Region of China, Xi'an University of Technology, Xi'an, 710048, Shaanxi, China.
| | - Chunxiang Liu
- Key Laboratory of Resource and Plant Biology of Anhui Province, College of Life Science, Huaibei Normal University, Huaibei, 235000, People's Republic of China
| | - Ziyi Xu
- Key Laboratory of Resource and Plant Biology of Anhui Province, College of Life Science, Huaibei Normal University, Huaibei, 235000, People's Republic of China
| | - Jinhui Wang
- Key Laboratory of Resource and Plant Biology of Anhui Province, College of Life Science, Huaibei Normal University, Huaibei, 235000, People's Republic of China
| | - Sheng Qian
- Key Laboratory of Resource and Plant Biology of Anhui Province, College of Life Science, Huaibei Normal University, Huaibei, 235000, People's Republic of China
| | - Han Zhou
- Key Laboratory of Resource and Plant Biology of Anhui Province, College of Life Science, Huaibei Normal University, Huaibei, 235000, People's Republic of China
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14
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Ma P, Ding W, Yuan J, Yi L, Zhang H. Total recycle strategy of phosphorus recovery from wastewater using granule chitosan inlaid with γ-AlOOH. ENVIRONMENTAL RESEARCH 2020; 184:109309. [PMID: 32179264 DOI: 10.1016/j.envres.2020.109309] [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: 08/29/2019] [Revised: 11/28/2019] [Accepted: 02/24/2020] [Indexed: 06/10/2023]
Abstract
Eutrophication which caused by excessive phosphorus in aquatic environment is a worldwide problem. Phosphorus is a nonrenewable resource widely used in agriculture and industry. Therefore, the development of economical methods for phosphorus capture and reuse from wastewater is urgently needed. In this study, a novel granule chitosan inlaid with γ-AlOOH on its structure (γ-AlOOH@CS) was prepared for phosphate removal with a recycle manner. Results showed that γ-AlOOH@CS exhibited a fast phosphate removal of 0.5 h for half adsorption capacity. The material presented a high adsorption capacity of 45.82 mg/g, the adsorption capacity maintained stability at pH 4-6, and favorable selectivity was observed when compared with other common anions. Column experiment was also performed well in treatment of the simulated wastewater. Isotherms and thermodynamics studies indicated that phosphate adsorption onto γ-AlOOH@CS was heterogeneous, spontaneous and exothermic. In material recycle experiment, by using NaOH solution as solvent and phosphoric acid as precipitant under hydrothermal reaction conditions, the products of chitosan, aluminum phosphate and sodium dihydrogen phosphate were obtained, with their purity reaching the industrial standard. Meanwhile, chitosan can be reused for new γ-AlOOH@CS preparation. This study provides a total recycle strategy of phosphorus removal from wastewater.
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Affiliation(s)
- Peigen Ma
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, China
| | - Wenming Ding
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, China.
| | - Jiongliang Yuan
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, China
| | - Long Yi
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, China
| | - Haitao Zhang
- College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, China
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15
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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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16
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Chará-Serna AM, Epele LB, Morrissey CA, Richardson JS. Nutrients and sediment modify the impacts of a neonicotinoid insecticide on freshwater community structure and ecosystem functioning. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 692:1291-1303. [PMID: 31539961 DOI: 10.1016/j.scitotenv.2019.06.301] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Revised: 06/18/2019] [Accepted: 06/19/2019] [Indexed: 05/07/2023]
Abstract
Pesticides are important contributors to the global freshwater biodiversity crisis. Among pesticides, neonicotinoids are the best-selling class of agricultural insecticides and are suspected to represent significant risks to freshwater and terrestrial ecosystems worldwide. Despite growing recognition that neonicotinoid impacts may be modified by the presence of additional stressors, there is limited information about their interactions with other agricultural stressors in freshwater ecosystems. We conducted an outdoor pond-mesocosm experiment to investigate the individual and interactive effects of nutrients, fine sediment, and imidacloprid (a neonicotinoid insecticide) inputs on freshwater community structure (density, diversity, and composition of zooplankton and benthic invertebrates) and ecosystem functioning (ecosystem metabolism, primary production, and organic matter decomposition). We hypothesized antagonistic nutrient-imidacloprid, and synergistic sediment-imidacloprid interactions, affecting aquatic invertebrate communities. The three stressors had significant individual and interactive effects on pond ecosystems. The insecticide neutralized the positive effects of nutrient additions on benthic invertebrate richness and mitigated the negative effects of sediment on zooplankton communities (antagonistic interactions). Moreover, we observed compensatory responses of tolerant benthic invertebrates, which resulted in reversal interactions between sediment and imidacloprid. Furthermore, our observations suggest that imidacloprid has the potential to increase net ecosystem production at environmentally relevant concentrations. Our findings support the hypothesis that the impacts of imidacloprid may be modified by other agricultural stressors. This has important implications on a global scale, given the widespread use of these pesticides in intensive agricultural landscapes and the growing body of literature suggesting that traditional pesticide assessment frameworks, based on laboratory toxicity tests alone, may be insufficient to adequately predict effects to complex freshwater ecosystems.
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Affiliation(s)
- Ana M Chará-Serna
- Department of Forest and Conservation Sciences, University of British Columbia, 2424 Main Mall, Vancouver, BC V6T 1Z4, Canada; Centro para la Investigación en Sistemas Sostenibles de Producción Agropecuaria (CIPAV), Carrera 25 No. 6-62, Cali, Colombia.
| | - Luis B Epele
- Centro de Investigación Esquel de Montaña y Estepa Patagónica (CONICET-UNPSJB), Roca 780, Esquel, Chubut, Argentina
| | - Christy A Morrissey
- Department of Biology and School of Environment and Sustainability, University of Saskatchewan, 112 Science Place, Saskatoon, Saskatchewan, Canada
| | - John S Richardson
- Department of Forest and Conservation Sciences, University of British Columbia, 2424 Main Mall, Vancouver, BC V6T 1Z4, Canada
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Abstract
Although ponds are common elements in the environment, dependences occurring in these ecosystems have not been fully investigated. Our study focuses on the correlation between environmental factors and changes occurring in ponds—mostly the distribution of macrophytes in space and time. The aim of our analyses was to indicate which physicochemical variables were characteristic of ponds in specific habitats (forest, agriculture field, and village) and whether they could associate the distribution of vegetation in these ponds. Thirteen ponds differing in morphometric parameters and location in landscape (ponds located in agriculture fields, forests, and villages) were analyzed. Our research was based on data covering a period of 10 years (2008–2018). The following parameters were analyzed: the water content of NH4+, NO3−, NO2−, TP, PO43−, Na, K, Mg, Ca, and Fe, pH, temperature and morphometric parameters. Macrophytes were observed during the growing season in July 2008, 2010, 2012, 2014, 2016 and 2018. Three homogeneous species groups were distinguished in statistical analyses and the dominance of selective environmental factors was assigned to them. The first group consisted of indicator species for forest ponds. Their waters were characterized by a low content of Ca, Mg, and Na as well as an increased content of NH4+ and Fe. The second group was composed of indicator species for field ponds, where the highest NO3− concentrations were found. The third group was formed by indicator species for village ponds. Water of these ponds was characterized by higher concentration levels of K, Na, and total P.
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18
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Oertli B, Parris KM. Review: Toward management of urban ponds for freshwater biodiversity. Ecosphere 2019. [DOI: 10.1002/ecs2.2810] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Affiliation(s)
- Beat Oertli
- HEPIA, HES‐SO University of Applied Sciences and Arts Western Switzerland 150 Route de Presinge 1254 Jussy‐Geneva Switzerland
| | - Kirsten M. Parris
- School of Ecosystem and Forest Sciences The University of Melbourne Parkville Victoria 3010 Australia
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19
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Ecological and Conservation Value of Small Standing-Water Ecosystems: A Systematic Review of Current Knowledge and Future Challenges. WATER 2019. [DOI: 10.3390/w11030402] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A small standing-water ecosystem (SWE) is a shallow (<20 m) lentic water body with a surface of a few hectares (≤10 ha). Compared to larger counterparts, they exhibit wider ecotones, sometimes even equaling their whole surface, which maximizes structural heterogeneity, supporting exceptionally high biodiversity, metabolic rates, and functionality. Surprisingly, no binding regulations support global strategies for SWE conservation. This work consists of a literature review performed for the period 2004–2018 to assess the ecological and conservation value of SWEs and the contribution of the Water Framework Directive (WFD) in promoting their conservation. Outcomes from this work open new perspectives on SWEs, which emerge as valuable ecosystems, and confirm their pivotal contribution to watershed biodiversity, resilience, and functionality. Results also suggest clear narrative trends and large knowledge gaps across geographical areas, biological components, and target issues. Additionally, we note that SWEs are under-represented in the frame of WFD implementation, stressing their marginality into assessing procedures. All of this calls for further studies, especially outside Europe and with a global, multi-taxon perspective. These should be devoted to quantitatively assess the roles of SWEs in maintaining global water ecosystem quality, biodiversity, and services, and to prioritize management actions for their conservation.
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20
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Cao Y, Hawkins CP. Weighting effective number of species measures by abundance weakens detection of diversity responses. J Appl Ecol 2019. [DOI: 10.1111/1365-2664.13345] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yong Cao
- Illinois Natural History Survey Prairie Research Institute University of Illinois Champaign Illinois
| | - Charles P. Hawkins
- Department of Watershed Sciences, Ecology Center National Aquatic Monitoring Center Utah State University Logan Utah
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21
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Getting the full picture: Assessing the complementarity of citizen science and agency monitoring data. PLoS One 2017; 12:e0188507. [PMID: 29211752 PMCID: PMC5718424 DOI: 10.1371/journal.pone.0188507] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Accepted: 11/08/2017] [Indexed: 11/19/2022] Open
Abstract
While the role of citizen science in engaging the public and providing large-scale datasets has been demonstrated, the nature of and potential for this science to supplement environmental monitoring efforts by government agencies has not yet been fully explored. To this end, the present study investigates the complementarity of a citizen science programme to agency monitoring of water quality. The Environment Agency (EA) is the governmental public body responsible for, among other duties, managing and monitoring water quality and water resources in England. FreshWater Watch (FWW) is a global citizen science project that supports community monitoring of freshwater quality. FWW and EA data were assessed for their spatio-temporal complementarity by comparing the geographical and seasonal coverage of nitrate (N-NO3) sampling across the River Thames catchment by the respective campaigns between spring 2013 and winter 2015. The analysis reveals that FWW citizen science-collected data complements EA data by filling in both gaps in the spatial and temporal coverage as well as gaps in waterbody type and size. In addition, partial spatio-temporal overlap in sampling efforts by the two actors is discovered, but EA sampling is found to be more consistent than FWW sampling. Statistical analyses indicate that regardless of broader geographical overlap in sampling effort, FWW sampling sites are associated with a lower stream order and water bodies of smaller surface areas than EA sampling sites. FWW also samples more still-water body sites than the EA. As a possible result of such differences in sampling tendencies, nitrate concentrations, a measure of water quality, are lower for FWW sites than EA sites. These findings strongly indicate that citizen science has clear potential to complement agency monitoring efforts by generating information on freshwater ecosystems that would otherwise be under reported.
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22
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Ilg C, Oertli B. Effectiveness of amphibians as biodiversity surrogates in pond conservation. CONSERVATION BIOLOGY : THE JOURNAL OF THE SOCIETY FOR CONSERVATION BIOLOGY 2017; 31:437-445. [PMID: 27503782 DOI: 10.1111/cobi.12802] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Accepted: 07/18/2016] [Indexed: 06/06/2023]
Abstract
Amphibian decline has led to worldwide conservation efforts, including the identification and designation of sites for their protection. These sites could also play an important role in the conservation of other freshwater taxa. In 89 ponds in Switzerland, we assessed the effectiveness of amphibians as a surrogate for 4 taxonomic groups that occur in the same freshwater ecosystems as amphibians: dragonflies, aquatic beetles, aquatic gastropods, and aquatic plants. The ponds were all of high value for amphibian conservation. Cross-taxon correlations were tested for species richness and conservation value, and Mantel tests were used to investigate community congruence. Species richness, conservation value, and community composition of amphibians were weakly congruent with these measures for the other taxonomic groups. Paired comparisons for the 5 groups considered showed that for each metric, amphibians had the lowest degree of congruence. Our results imply that site designation for amphibian conservation will not necessarily provide protection for freshwater biodiversity as a whole. To provide adequate protection for freshwater species, we recommend other taxonomic groups be considered in addition to amphibians in the prioritization and site designation process.
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Affiliation(s)
- Christiane Ilg
- hepia Geneva Member of the HES-SO University of Applied Sciences and Arts Western Switzerland, 150 route de Presinge, 1254, Jussy-Geneva, Switzerland
| | - Beat Oertli
- hepia Geneva Member of the HES-SO University of Applied Sciences and Arts Western Switzerland, 150 route de Presinge, 1254, Jussy-Geneva, Switzerland
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23
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Wang F, Wang YT, Yu H, Chen JX, Gao BB, Lang JP. One Unique 1D Silver(I)-Bromide-Thiol Coordination Polymer Used for Highly Efficient Chemiresistive Sensing of Ammonia and Amines in Water. Inorg Chem 2016; 55:9417-23. [DOI: 10.1021/acs.inorgchem.6b01688] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Fan Wang
- State and Local Joint Engineering Laboratory for Novel Functional
Polymeric Materials, College of Chemistry, Chemical Engineering and
Materials Science, Soochow University, Suzhou 215123, Jiangsu, P. R. China
- State
Key Laboratory of Organometallic Chemistry, Shanghai Institute of
Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P. R. China
| | - Yu-Ting Wang
- State and Local Joint Engineering Laboratory for Novel Functional
Polymeric Materials, College of Chemistry, Chemical Engineering and
Materials Science, Soochow University, Suzhou 215123, Jiangsu, P. R. China
| | - Hong Yu
- State and Local Joint Engineering Laboratory for Novel Functional
Polymeric Materials, College of Chemistry, Chemical Engineering and
Materials Science, Soochow University, Suzhou 215123, Jiangsu, P. R. China
| | - Jin-Xiang Chen
- School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, Guangdong, P. R. China
| | - Bin-Bin Gao
- State and Local Joint Engineering Laboratory for Novel Functional
Polymeric Materials, College of Chemistry, Chemical Engineering and
Materials Science, Soochow University, Suzhou 215123, Jiangsu, P. R. China
| | - Jian-Ping Lang
- State and Local Joint Engineering Laboratory for Novel Functional
Polymeric Materials, College of Chemistry, Chemical Engineering and
Materials Science, Soochow University, Suzhou 215123, Jiangsu, P. R. China
- State
Key Laboratory of Organometallic Chemistry, Shanghai Institute of
Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P. R. China
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24
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Kelly SL, Song H, Jenkins DG. Land management practices interactively affect wetland beetle ecological and phylogenetic community structure. ECOLOGICAL APPLICATIONS : A PUBLICATION OF THE ECOLOGICAL SOCIETY OF AMERICA 2015; 25:891-900. [PMID: 26465031 DOI: 10.1890/14-1225.1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Management practices can disturb ecological communities in grazing lands, which represent one-quarter of land surface. But three knowledge gaps exist regarding disturbances: disturbances potentially interact but are most often studied singly; experiments with multiple ecosystems as treatment units are rare; and relatively new metrics of phylogenetic community structure have not been widely applied. We addressed all three of these needs with a factorial experiment; 40 seasonal wetlands embedded in a Florida ranch were treated with pasture intensification, cattle exclosure, and prescribed fire. Treatment responses were evaluated through four years for aquatic beetle (Coleoptera: Adephaga) assemblages using classic ecological metrics (species richness, diversity) and phylogenetic community structure (PCS) metrics. Adephagan assemblages consisted of 23 genera representing three families in a well-resolved phylogeny. Prescribed fire significantly reduced diversity one year post-fire, followed by a delayed pasture X fire interaction. Cattle exclosure significantly reduced one PCS metric after one year and a delayed pasture x fence x fire interaction was detected with another PCs metric. Overall, effects of long-term pasture intensification were modified by cattle exclosure and prescribed fire. Also, PCS metrics revealed effects otherwise undetected by classic ecological metrics. Management strategies (e.g., "flash grazing," prescribed fires) in seasonal wetlands may successfully balance economic gains from high forage quality with ecological benefits of high wetland diversity in otherwise simplified grazing lands. Effects are likely taxon specific; multiple taxa should be similarly evaluated.
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25
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Clarke SJ. Conserving freshwater biodiversity: The value, status and management of high quality ditch systems. J Nat Conserv 2015. [DOI: 10.1016/j.jnc.2014.10.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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