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Niche processes shape zooplankton community structure in a sediment-laden river basin

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Abstract

Zooplankton play a key role in freshwater ecosystems; however, their community succession and responses to environmental stress remain poorly understood. To fill this gap, zooplankton community dynamics in the main stream, five tributaries and three reservoirs of the Yanhe River Basin (China) were studied in spring and autumn at the zooplankton functional group (ZFG) level. Principal component analysis and non-metric multidimensional scaling were used to reveal the spatiotemporal characteristics of aquatic environmental and zooplankton community structure (ZCS), respectively. Subsequently, redundancy analysis and niche measures were conducted to explore the effects of environmental factors and biotic interactions on ZCS. Significant spatiotemporal heterogeneity in both aquatic environment and ZCS were found. Turbidity, total nitrogen, nitrite-nitrogen, chemical oxygen demand, pH, water depth, water temperature, and chlorophyll a emerged as primary environmental drivers of ZCS. Regarding biotic interactions, weak competition in spring contributed to the positive community succession, while in autumn, intense competition and predation between ZFGs, along with elimination of vulnerable groups, led to community instability. Niche processes emerged as significant shaping factors in the Yanhe River Basin’ ZCS. Our study provides valuable insights into zooplankton community response to environmental changes and offers potential applications for understanding other aquatic organisms and ecosystems.

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Acknowledgements

We are very grateful to Zehao Wang and Xifeng Han for they contribution to the field investigation. Thanks are also due to anonymous reviewers for their comments and valuable suggestions on the manuscript particularly on statistical approaches.

Funding

This project was supported by the National Natural Science Foundation of China. (No. 51939009) and Key Research and Development Program of Shaanxi (2021ZDLSF05-10).

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ZY conceived the ideas, collected the samples, and wrote the original draft; ZY, GL and JH analyzed the data; ZY, XL, EH and ZH led the writing of the manuscript. All authors commented on earlier drafts of this manuscript and approved its final version.

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Correspondence to Baozhu Pan.

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The authors declare that there is no conflict of interest.

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Yang, Z., Pan, B., Liu, X. et al. Niche processes shape zooplankton community structure in a sediment-laden river basin. Hydrobiologia 851, 1353–1370 (2024). https://doi.org/10.1007/s10750-023-05355-8

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  • DOI: https://doi.org/10.1007/s10750-023-05355-8

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