

FOLLOWUS
1.National and Local Joint Engineering Research Center of Ecological Treatment Technology for Urban Water Pollution, Zhejiang Provincial Key Lab for Water Environment and Marine Biological Resources Protection, Wenzhou 325000, China
2.Wenzhou Shanxi Hydro-junction Management Center, Wenzhou 325000, China
zhanghe1983004@sina.com
renhui.li@wzu.edu.cn
Received:12 November 2024,
Accepted:01 March 2025,
Online First:02 April 2025,
Published:01 January 2026
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ZHAO Qihang,ZUO Jun,CUI Baiyu,et al.Rainfall and water temperature co-drive changes in structure and assembly of prokaryotic and eukaryotic communities in a subtropical riverine reservoir[J].Journal of Oceanology and Limnology,2026,44(01):251-267.
ZHAO Qihang,ZUO Jun,CUI Baiyu,et al.Rainfall and water temperature co-drive changes in structure and assembly of prokaryotic and eukaryotic communities in a subtropical riverine reservoir[J].Journal of Oceanology and Limnology,2026,44(01):251-267. DOI: 10.1007/s00343-025-4298-7.
Microbial communities play indispensable roles in the biogeochemical cycling of river ecosystems. However
the response patterns of microbial community diversity
niche breadth
and assembly to rainfall disturbances in complex mountainous riverine reservoirs remain inadequately understood. We employed high-throughput sequencing of 16S and 18S ribosomal RNA genes
along with multivariate statistical methods to systematically investigate prokaryotic and eukaryotic microorganisms in the riverine Zhaoshandu Reservoir
Wenzhou
Zhejiang
East China. Results show significant temporal heterogeneity in both prokaryotic and eukaryotic microbial communities
with eukaryotic microbes showing more pronounced temporal variation. Canonical correspondence analysis revealed that rainfall and water temperature were the key drivers shaping microbial communities. Additionally
eukaryotic microorganisms exhibited a more pronounced response to rainfall and water temperature compared to prokaryotes. Modified stochasticity ratio model indicated that deterministic processes predominantly governed microbial community assembly
with stronger deterministic processes in eukaryotic compared to prokaryotic microorganisms. Rainfall has significantly altered water quality
notably increasing phosphorus concentration in the water column. Total phosphorus and total nitrogen showed significant correlations with the niche breadth of prokaryotic and eukaryotic microorganisms
and phosphorus nutrients served as keystones and playing indispensable roles in their co-occurrence networks. A structural equation model confirmed the notable impacts of rainfall and water temperature on microbial community diversity
further revealing that rainfall indirectly influenced the niche breadth and co-occurrence relationships of microbial communities by altering phosphorus concentrations. The findings underscore the influence of rainfall and water temperature on microbial distribution
highlighting the sensitivity of riverine reservoir ecosystems to climate change.
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