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Wang H, Dong Y, Jiang Y, Zhang N, Liu Y, Lu X, Fan Y. Multiple stressors determine the process of the benthic diatom community assembly and network stability in urban water bodies in Harbin. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 913:169536. [PMID: 38141986 DOI: 10.1016/j.scitotenv.2023.169536] [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: 08/25/2023] [Revised: 12/06/2023] [Accepted: 12/18/2023] [Indexed: 12/25/2023]
Abstract
Human activities have triggered biodiversity loss, often resulting in biotic homogenization, which poses a threat to human well-being. Nevertheless, the overall influence of diverse environmental stressors on intra- and inter-community diversity remains insufficiently elucidated. This study aimed to quantify and reveal the impact of environmental stressors on the alpha and beta diversities of benthic diatom communities in the Harbin urban river network during the summer and autumn of 2022 and spring of 2023. The marked seasonal variations observed in alpha and beta diversity indices highlighted the distinct community compositions. Nonetheless, varying types of urban water pollutants were the primary drivers of biotic homogenization in terms of both taxonomic and functional diversities and played a prominent role in steering diversity shifts. These pollutants indirectly led to biotic homogenization by altering water quality parameters and affecting the ecological dynamics of benthic diatom communities. Furthermore, diverse responses to stressors were identified in taxonomic and functional diversities, providing additional insights for understanding ecological shifts in communities. Taxonomic beta diversity was related to environmental filtering, whereas functional beta diversity resulted from stressor-spatial dimension interactions. Our study emphasises that relying solely on traditional water quality monitoring may not fully reveal the current state of river ecosystem protection, and the need to study the continuous changes in biodiversity across seasons in urban waterbodies from the perspective of various stressors is highlighted.
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Affiliation(s)
- Hao Wang
- College of Life Sciences and Technology, Harbin Normal University, Harbin 150025, China
| | - Yanlong Dong
- College of Life Sciences and Technology, Harbin Normal University, Harbin 150025, China
| | - Yutong Jiang
- College of Life Sciences and Technology, Harbin Normal University, Harbin 150025, China
| | - Nannan Zhang
- Modern Educational Technology and Experiment Center, Harbin Normal University, Harbin 150025, China
| | - Yan Liu
- College of Life Sciences and Technology, Harbin Normal University, Harbin 150025, China; Key Laboratory of Biodiversity of Aquatic Organisms, Harbin Normal University, Harbin 150025, China
| | - Xinxin Lu
- College of Life Sciences and Technology, Harbin Normal University, Harbin 150025, China; Key Laboratory of Biodiversity of Aquatic Organisms, Harbin Normal University, Harbin 150025, China.
| | - Yawen Fan
- College of Life Sciences and Technology, Harbin Normal University, Harbin 150025, China; Key Laboratory of Biodiversity of Aquatic Organisms, Harbin Normal University, Harbin 150025, China.
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Datry T, Truchy A, Olden JD, Busch MH, Stubbington R, Dodds WK, Zipper S, Yu S, Messager ML, Tonkin JD, Kaiser KE, Hammond JC, Moody EK, Burrows RM, Sarremejane R, DelVecchia AG, Fork ML, Little CJ, Walker RH, Walters AW, Allen D. Causes, Responses, and Implications of Anthropogenic versus Natural Flow Intermittence in River Networks. Bioscience 2022. [DOI: 10.1093/biosci/biac098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Abstract
Rivers that do not flow year-round are the predominant type of running waters on Earth. Despite a burgeoning literature on natural flow intermittence (NFI), knowledge about the hydrological causes and ecological effects of human-induced, anthropogenic flow intermittence (AFI) remains limited. NFI and AFI could generate contrasting hydrological and biological responses in rivers because of distinct underlying causes of drying and evolutionary adaptations of their biota. We first review the causes of AFI and show how different anthropogenic drivers alter the timing, frequency and duration of drying, compared with NFI. Second, we evaluate the possible differences in biodiversity responses, ecological functions, and ecosystem services between NFI and AFI. Last, we outline knowledge gaps and management needs related to AFI. Because of the distinct hydrologic characteristics and ecological impacts of AFI, ignoring the distinction between NFI and AFI could undermine management of intermittent rivers and ephemeral streams and exacerbate risks to the ecosystems and societies downstream.
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Affiliation(s)
- Thibault Datry
- INRAE , UR RiverLy, Centre Lyon-Grenoble Auvergne-Rhône-Alpes, Villeurbanne France
| | - Amélie Truchy
- INRAE , UR RiverLy, Centre Lyon-Grenoble Auvergne-Rhône-Alpes, Villeurbanne France
| | - Julian D Olden
- School of Aquatic and Fishery Sciences, University of Washington , Seattle Washington, United States
| | - Michelle H Busch
- Department of Biology, University of Oklahoma , Norman, Oklahoma, United States
| | - Rachel Stubbington
- School of Science and Technology, Nottingham Trent University , Nottingham, England, United Kingdom
| | - Walter K Dodds
- Division of Biology, Kansas State University , Manhattan, Kansas, United States
| | - Sam Zipper
- Kansas Geological Survey, University of Kansas , Lawrence, Kansas, United States
| | - Songyan Yu
- Australian Rivers Institute, School of Environment and Science, Griffith University , Nathan, Queensland, Australia
| | - Mathis L Messager
- Department of Geography, McGill University , Montreal, Quebec, Canada
| | - Jonathan D Tonkin
- School of Biological Sciences, University of Canterbury , Auckland, New Zealand
| | - Kendra E Kaiser
- Department of Geosciences, Boise State University , Boise, Idaho, United States
| | - John C Hammond
- Department of Ecosystem Science and Sustainability, Colorado State University , Fort Collins, Colorado, United States
| | - Eric K Moody
- Department of Biology, Middlebury College , Middlebury, Vermont, United States
| | - Ryan M Burrows
- School of Ecosystem and Forest Sciences, University of Melbourne , Burnley Campus, Burnley, Victoria, Australia
| | - Romain Sarremejane
- INRAE , UR RiverLy, Centre Lyon-Grenoble Auvergne-Rhône-Alpes, Villeurbanne France
| | - Amanda G DelVecchia
- Department of Biology, Duke University , Durham, North Carolina, United States
| | - Megan L Fork
- Department of Biology, West Chester University , West Chester, Pennsylvania, United States
| | - Chelsea J Little
- Department of Biology, West Chester University , West Chester, Pennsylvania, United States
| | - Richard H Walker
- Department of Biology and Chemistry, Upper Iowa University , Fayette, Iowa, United States
| | - Annika W Walters
- Department of Zoology and Physiology, Program in Ecology, University of Wyoming , Larame, Wyoming, United States
| | - Daniel Allen
- Department of Ecosystem Science and Management, Pennsylvania State University , University Park, Pennsylvania, United States
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Du X, Song D, Ming K, Yang J, Jin X, Wang H, Liu H, Wang L, Zhao C, Huo T. Functional Responses of Phytoplankton Assemblages to Watershed Land Use and Environmental Gradients. Front Ecol Evol 2022. [DOI: 10.3389/fevo.2021.819252] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Watershed land-use changes have been identified as major threats to lake fauna, subsequently affecting ecosystem functioning. In this study, the functional-based approach was used to examine the effects of land use and environmental changes on phytoplankton communities in four selected lakes in Northeast China. We also identified the sensitive functional traits as indicators of environmental stressors. The integration of RLQ analysis with the fourth-corner approach significantly identified five of 18 functional trait categories, including flagella, filamentous, unicellular, mixotrophic, and chlorophyll c, as potential indicators to changes in watershed land-use intensity and environmental gradients. Significant relationships between traits and land use and water quality highlighted the consequential indirect impact of extensive agricultural and urban development on phytoplankton via allochthonous nutrient inputs and various contaminants. In addition, the functional richness of phytoplankton assemblages generally increased along with surface area and forests, but decreased along with intensive agricultural and urban land use, implying that functional homogenization may cause a reduction in ecosystem productivity and reliability to land-use intensity. Given the superior performance of the functional-based approach, our findings also highlighted the importance of the application of both the biological traits and functional diversity index in monitoring programs for lake ecosystems.
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