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Responses of macrozoobenthos communities to changes in submerged macrophyte biomass in 19 temperate lakes in China

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Abstract

Macrozoobenthos and submerged macrophytes interact closely. However, studies in China have focused on the middle and lower reaches of the Yangtze River, where shallow lakes are concentrated, rather than on temperate lakes. To clarify the responses of taxonomic and functional groups of macrozoobenthos in temperate lakes to changes in submerged macrophyte biomass (BMac) on a large scale, 19 temperate lakes within Baiyangdian Lake were investigated in this study. The BMac differed greatly across the 19 lakes, and Potamogeton crispus was the dominant species. According to the BMac, the 19 lakes were divided into 4 groups. One-way analysis of variance and Pearson correlation analysis showed that the water environmental parameters were different among the 4 groups, and the BMac was significant correlated with all the physical and chemical parameters of water bodies (except for water depth). Forty-one taxa of macrozoobenthos were identified in the 19 lakes, with oligochaetes, Hirudinea, gastropods, crustaceans, chironomid larvae, and aquatic insects (excluding chironomid larvae) represented by 9, 1, 4, 2, 19, and 6 species, respectively. Chironomid larvae and oligochaetes dominated by density, and gastropods and chironomid larvae dominated by biomass. Canonical correspondence analysis showed that the BMac was the most important factor affecting the macrozoobenthos community structure in group 1 to group 4. Macrozoobenthos with low pollution tolerance values were mainly found in areas with high BMac, while species with high pollution tolerance values were mainly distributed in areas with low BMac and high nutrient contents. Different taxonomic and functional groups of macrozoobenthos responded differently to changes in BMac. As BMac increased, density and biomass of oligochaetes and chironomid larvae tended to decrease, while those of gastropods and aquatic insects tended to first decrease and then increase. Collectors had more species than any other functional group in group 1 to group 4. As BMac increased, density and biomass of collectors gradually decreased, while density of predators, shredders, and scrapers tended to first decrease and then increase.

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Acknowledgements

We would like to thank Heyin Wang and Xiao Wang of Anqing Normal University for their help in the field survey.

Funding

This study was supported by the National Key R&D Program of China (2019YFD0900604), the Shanghai Sailing Program (No. 18YF1407500), and the Baiyangdian Aquatic Biological Resources Investigation and Water Ecological Restoration Demonstration Project (2018 LKY007).

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Hao Zhu and Xiaoke Zhang designed the study and performed the experiments. Hao Zhu and Xuan Che performed the experiments. Hao Zhu, Shuiping Cheng, and Xiaoke Zhang prepared the figures and tables. Xiaoke Zhang, Shuiping Cheng, and Xingguo Liu analysed the data, and Hao Zhu wrote the manuscript.

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Correspondence to Xiaoke Zhang.

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The authors declare no competing interests.

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Responsible Editor: Thomas Hein

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Appendix 1

Appendix 1

Table 4 Species list of macrozoobentos in 19 temperate lakes in China

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Zhu, H., Cheng, S., Zhang, X. et al. Responses of macrozoobenthos communities to changes in submerged macrophyte biomass in 19 temperate lakes in China. Environ Sci Pollut Res 29, 59211–59223 (2022). https://doi.org/10.1007/s11356-022-20007-5

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  • DOI: https://doi.org/10.1007/s11356-022-20007-5

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