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de Donnová S, Devánová A, Barešová L, Zahrádková S, Bojková J. Hydromorphological degradation modifies long-term macroinvertebrate responses to water quality and climate changes in lowland rivers. ENVIRONMENTAL RESEARCH 2024; 261:119638. [PMID: 39032623 DOI: 10.1016/j.envres.2024.119638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2024] [Revised: 07/15/2024] [Accepted: 07/16/2024] [Indexed: 07/23/2024]
Abstract
Due to decades of persistent anthropogenic pressures, lowland rivers represent one of the most severely impaired habitats in Europe. Despite improved water quality, novel stressors, particularly climate change, are emerging with most lowland rivers suffering from past hydromorphological degradation. We aim to elucidate how such degradation alters the biological response in multiple-stressor environments, as this has rarely been considered in studies documenting long-term development of anthropogenically impacted rivers. Here, benthic macroinvertebrates, water quality and hydroclimatic variables were monitored over a period of two decades in nine of the largest Czech rivers. Detailed data on hydromorphological degradation allowed us to track distinct patterns in rivers with high and low levels of degradation. Temporal changes in environmental variables showed similar patterns in both site groups, characterised by reduced organic and nutrient pollution but increased hydroclimatic and salinity stress. 150 % increase in total abundance, especially in abundance and richness of sediment-dwelling and non-native taxa was found in both site groups. While the increase in abundance was due to improved water quality and rising water temperature, the longer duration of minimal flows had a negative effect on species richness, hampering species gain particularly at highly degraded sites. Our results provide novel evidence that degree of hydromorphological degradation modifies long-term macroinvertebrate responses to anthropogenic pressures. Less degraded sites displayed several favourable changes, such as 27 % increase in total and 23 % increase in potamal indicator richness, and stabilisation of the assemblages with few functional changes. In contrast, highly degraded sites experienced 9 % reduction in evenness, 235 % increase in proportion of non-native taxa and functional reorganisation, changes congruent with continuous deterioration. While overall water quality at studied sites has improved, consequences of climate change and high degree of hydromorphological degradation limit biotic recovery in multiple-stressor lowland rivers.
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Affiliation(s)
- Selma de Donnová
- Department of Botany and Zoology, Faculty of Science, Masaryk University, Kotlářská 2, CZ-61137 Brno, 611 37 Brno, Czech Republic.
| | - Alžbeta Devánová
- Department of Botany and Zoology, Faculty of Science, Masaryk University, Kotlářská 2, CZ-61137 Brno, 611 37 Brno, Czech Republic
| | - Libuše Barešová
- Czech Hydrometeorological Institute, Na Šabatce 17, 143 06 Praha, CZ-14306 , Czech Republic
| | - Světlana Zahrádková
- Department of Botany and Zoology, Faculty of Science, Masaryk University, Kotlářská 2, CZ-61137 Brno, 611 37 Brno, Czech Republic
| | - Jindřiška Bojková
- Department of Botany and Zoology, Faculty of Science, Masaryk University, Kotlářská 2, CZ-61137 Brno, 611 37 Brno, Czech Republic
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Klümper U, Gionchetta G, Catão E, Bellanger X, Dielacher I, Elena AX, Fang P, Galazka S, Goryluk-Salmonowicz A, Kneis D, Okoroafor U, Radu E, Szadziul M, Szekeres E, Teban-Man A, Coman C, Kreuzinger N, Popowska M, Vierheilig J, Walsh F, Woegerbauer M, Bürgmann H, Merlin C, Berendonk TU. Environmental microbiome diversity and stability is a barrier to antimicrobial resistance gene accumulation. Commun Biol 2024; 7:706. [PMID: 38851788 PMCID: PMC11162449 DOI: 10.1038/s42003-024-06338-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Accepted: 05/15/2024] [Indexed: 06/10/2024] Open
Abstract
When antimicrobial resistant bacteria (ARB) and genes (ARGs) reach novel habitats, they can become part of the habitat's microbiome in the long term if they are able to overcome the habitat's biotic resilience towards immigration. This process should become more difficult with increasing biodiversity, as exploitable niches in a given habitat are reduced for immigrants when more diverse competitors are present. Consequently, microbial diversity could provide a natural barrier towards antimicrobial resistance by reducing the persistence time of immigrating ARB and ARG. To test this hypothesis, a pan-European sampling campaign was performed for structured forest soil and dynamic riverbed environments of low anthropogenic impact. In soils, higher diversity, evenness and richness were significantly negatively correlated with relative abundance of >85% of ARGs. Furthermore, the number of detected ARGs per sample were inversely correlated with diversity. However, no such effects were present in the more dynamic riverbeds. Hence, microbiome diversity can serve as a barrier towards antimicrobial resistance dissemination in stationary, structured environments, where long-term, diversity-based resilience against immigration can evolve.
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Affiliation(s)
- Uli Klümper
- Technische Universität Dresden, Institute for Hydrobiology, Dresden, Germany
| | - Giulia Gionchetta
- Eawag, Swiss Federal Institute of Aquatic Science and Technology, Department of Surface Waters - Research and Management, Kastanienbaum, Switzerland
| | - Elisa Catão
- Université de Lorraine, Villers-lès-Nancy, France
- Université de Toulon, Toulon, France
| | | | - Irina Dielacher
- TU Wien, Institute of Water Quality and Resource Management, Vienna, Austria
| | - Alan Xavier Elena
- Technische Universität Dresden, Institute for Hydrobiology, Dresden, Germany
| | - Peiju Fang
- Technische Universität Dresden, Institute for Hydrobiology, Dresden, Germany
| | - Sonia Galazka
- AGES - Austrian Agency for Health and Food Safety, Department for Integrative Risk Assessment, Division for Risk Assessment, Data and Statistics, Vienna, Austria
| | - Agata Goryluk-Salmonowicz
- University of Warsaw, Faculty of Biology, Institute of Microbiology, Department of Bacterial Physiology, Warsaw, Poland
- Warsaw University of Life Sciences, Institute of Biology, Department of Biochemistry and Microbiology, Warsaw, Poland
| | - David Kneis
- Technische Universität Dresden, Institute for Hydrobiology, Dresden, Germany
| | - Uchechi Okoroafor
- Maynooth University, Department of Biology, Kathleen Lonsdale Institute for Human Health, Maynooth, Co. Kildare, Ireland
| | - Elena Radu
- TU Wien, Institute of Water Quality and Resource Management, Vienna, Austria
- Romanian Academy of Science, Institute of Virology Stefan S. Nicolau, Bucharest, Romania
| | - Mateusz Szadziul
- University of Warsaw, Faculty of Biology, Institute of Microbiology, Department of Bacterial Physiology, Warsaw, Poland
| | - Edina Szekeres
- NIRDBS, Institute of Biological Research Cluj-Napoca, Cluj-Napoca, Romania
| | - Adela Teban-Man
- NIRDBS, Institute of Biological Research Cluj-Napoca, Cluj-Napoca, Romania
| | - Cristian Coman
- NIRDBS, Institute of Biological Research Cluj-Napoca, Cluj-Napoca, Romania
| | - Norbert Kreuzinger
- TU Wien, Institute of Water Quality and Resource Management, Vienna, Austria
| | - Magdalena Popowska
- University of Warsaw, Faculty of Biology, Institute of Microbiology, Department of Bacterial Physiology, Warsaw, Poland
| | - Julia Vierheilig
- TU Wien, Institute of Water Quality and Resource Management, Vienna, Austria
- Interuniversity Cooperation Centre Water & Health, Vienna, Austria
| | - Fiona Walsh
- Maynooth University, Department of Biology, Kathleen Lonsdale Institute for Human Health, Maynooth, Co. Kildare, Ireland
| | - Markus Woegerbauer
- AGES - Austrian Agency for Health and Food Safety, Department for Integrative Risk Assessment, Division for Risk Assessment, Data and Statistics, Vienna, Austria
| | - Helmut Bürgmann
- Eawag, Swiss Federal Institute of Aquatic Science and Technology, Department of Surface Waters - Research and Management, Kastanienbaum, Switzerland
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Dong R, Peng K, Zhang Q, Heino J, Cai Y, Gong Z. Spatial and temporal variation in lake macroinvertebrate communities is decreased by eutrophication. ENVIRONMENTAL RESEARCH 2024; 243:117872. [PMID: 38086502 DOI: 10.1016/j.envres.2023.117872] [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: 10/13/2023] [Revised: 11/15/2023] [Accepted: 12/03/2023] [Indexed: 12/17/2023]
Abstract
Eutrophication impacts freshwater ecosystems and biodiversity across the world. While temporal monitoring has shown changes in the nutrient inputs in many areas, how spatial and temporal beta diversity change along the eutrophication gradient under a changing context remains unclear. In this regard, analyses based on time series spanning multiple years are particularly scarce. We sampled benthic macroinvertebrates in 32 sites across three lake habitat types (MACROPHYTE, OPEN WATER, PHYTOPLANKTON) along the eutrophication gradient of Lake Taihu in four seasons from 2007 to 2019. Our purpose was to identify the relative contributions of spatial and temporal dissimilarity (i.e., inter-annual dissimilarity and seasonal dissimilarity) to overall benthic biodiversity. We also examined spatio-temporal patterns in community assembly mechanisms and how associated variation in benthic macroinvertebrate communities responded to nutrient indicators. Results showed that eutrophication caused macroinvertebrate community homogenization both along spatial and temporal gradients. Though spatial variability dominated the variation of species richness, abundance and community dissimilarity, seasons within years dissimilarity, inter-annual dissimilarity and seasonal dissimilarity were much more sensitive to eutrophication. Moreover, eutrophication inhibited a strong environmental control in benthic macroinvertebrate community assembly, including a dominant role of deterministic process in the spatial variation of macroinvertebrate communities and transition from stochastic to deterministic process in the temporal assembly of macroinvertebrate communities along the eutrophication gradient. In addition, some sites in PHYTOPLANKTON habitats showed similar spatial dissimilarity and spatial SES as sites in MACROPHYTE habitats, and the decreased spatial dissimilarity of three habitats implying that lake ecosystem recovery projects have achieved their goal at least to a certain degree.
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Affiliation(s)
- Rui Dong
- Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, PR China; University of Chinese Academy of Sciences, Beijing, PR China
| | - Kai Peng
- Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, PR China
| | - Qingji Zhang
- School of Geography and Ocean Science, Nanjing University, Nanjing, PR China
| | - Jani Heino
- Geography Research Unit, University of Oulu, P.O. Box 8000, FI-90014, Oulu, Finland
| | - Yongjiu Cai
- Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, PR China; University of Chinese Academy of Sciences, Beijing, PR China.
| | - Zhijun Gong
- Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, PR China; University of Chinese Academy of Sciences, Beijing, PR China.
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Markert N, Guhl B, Feld CK. Water quality deterioration remains a major stressor for macroinvertebrate, diatom and fish communities in German rivers. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 907:167994. [PMID: 37875194 DOI: 10.1016/j.scitotenv.2023.167994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 09/18/2023] [Accepted: 10/19/2023] [Indexed: 10/26/2023]
Abstract
About 60 % of Europe's rivers fail to meet ecological quality standards derived from biological criteria. The causes are manifold, but recent reports suggest a dominant role of hydro-morphological and water quality-related stressors. Yet, in particular micropollutants and hydrological stressors often tend to be underrepresented in multiple-stressor studies. Using monitoring data from four Federal States in Germany, this study investigated the effects of 19 stressor variables from six stressor groups (nutrients, salt ions, dissolved oxygen/water temperature, mixture toxicity of 51 micropollutants, hydrological alteration and morphological habitat quality) on three biological assemblages (fishes, macroinvertebrates, benthic diatoms). Biological effects were analyzed for 35 community metrics and quantified using Random Forest (RF) analyses to put the stressor groups into a hierarchical context. To compare metric responses, metrics were grouped into categories reflecting important characteristics of biological communities, such as sensitivity, functional traits, diversity and community composition as well as composite indices that integrate several metrics into one single index (e.g., ecological quality class). Water quality-related stressors - but not micropollutants - turned out to dominate the responses of all assemblages. In contrast, the effects of hydro-morphological stressors were less pronounced and stronger for hydrological stressors than for morphological stressors. Explained variances of RF models ranged 23-64 % for macroinvertebrates, 16-40 % for benthic diatoms and 18-48 % for fishes. Despite a high variability of responses across assemblages and stressor groups, sensitivity metrics tended to reveal stronger responses to individual stressors and a higher explained variance in RF models than composite indices. The results of this study suggest that (physico-chemical) water quality deterioration continues to impact biological assemblages in many German rivers, despite the extensive progress in wastewater treatment during the past decades. To detect water quality deterioration, monitoring schemes need to target relevant physico-chemical stressors and micropollutants. Furthermore, monitoring needs to integrate measures of hydrological alteration (e.g., flow magnitude and dynamics). At present, hydro-morphological surveys rarely address the degree of hydrological alteration. In order to achieve a good ecological status, river restoration and management needs to address both water quality-related and hydro-morphological stressors. Restricting analyses to just one single organism group (e.g., macroinvertebrates) or only selected metrics (e.g., ecological quality class) may hamper stressor identification and its hierarchical classification and, thus may mislead river management.
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Affiliation(s)
- Nele Markert
- North Rhine-Westphalian Office of Nature, Environment and Consumer Protection (LANUV NRW), 40208 Düsseldorf, Germany; University Duisburg-Essen, Faculty of Biology, Aquatic Ecology, Universitätsstr. 5, 45141 Essen, Germany.
| | - Barbara Guhl
- North Rhine-Westphalian Office of Nature, Environment and Consumer Protection (LANUV NRW), 40208 Düsseldorf, Germany
| | - Christian K Feld
- University Duisburg-Essen, Faculty of Biology, Aquatic Ecology, Universitätsstr. 5, 45141 Essen, Germany; University Duisburg-Essen, Centre for Water and Environmental Research (ZWU), Universitätsstr. 5, 45141 Essen, Germany
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