Page 101 - 《渔业研究》2025年第6期

792 渔 业 研 究 第 47 卷

Study on the distribution characteristics of zooplankton communities in spring
of Shanzai Reservoir, Fujian Province

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WENG Yuxin ，SU Yuping 1,2* ，XU Youqin ，CHEN Yingxin ，HU Juxiang ，CHEN Qiang 4
[1. College of Environmental and Resource Sciences, College of Carbon Neutral Modern Industry, Fujian Normal University,
Fuzhou 350117, China;
2. Fujian Research Center for Happy Rivers and Lakes (Fujian Normal University), Fuzhou 350007, China;
3. Institute of Hydroecology, Ministry of Water Resources & Chinese Academy of Sciences Research
Center for River and Lake Ecology, Wuhan 430079, China;
4. College of Materials and Chemical Engineering, Minjiang University, Fuzhou 350108, China]

Abstract: [Background] The water quality of drinking water source reservoirs is crucial for residential water
supply safety. Zooplankton, as a key component of aquatic food webs, can sensitively indicate ecological changes
through shifts in community structure. Human activities such as agricultural cultivation and aquaculture, as well
as invasive alien fish species, may significantly impact zooplankton communities, thereby threatening reservoir
ecological functions. [Objective] This study aims to reveal the spatiotemporal distribution patterns of the zo-
oplankton community in Shanzai Reservoir, a drinking water source in Fuzhou City, Fujian Province, during
spring, and to investigate its interactions with phytoplankton and fish communities. [Methods] Water samples
were collected from Shanzai Reservoir during spring in May 2023 and May 2024. Zooplankton and phytoplank-
ton species were identified, and their densities were analyzed. Concurrently, water quality parameters and envir-
onmental factors were measured. [Results] In the spring of 2023, 28 zooplankton species were identified, with
−1
an average density of (2 932±423) ind·L , where rotifers dominated absolutely, accounting for 91.6% of the
total density. In the spring of 2024, number of species increased to 33, while density decreased to (1 490±
−1
220) ind·L , with rotifers still predominant (86.9%). Zooplankton density exhibited a spatial trend of “inlet >
reservoir center” in both years (P<0.05). Zooplankton density showed significant positive correlations with dis-
solved oxygen (P<0.01) and chlorophyll-a concentrations (P<0.05), and a negative correlation with water trans-
parency (P<0.05). Compared with the spring of 2023, zooplankton diversity indices in the spring of 2024 im-
proved significantly: the Shannon-Wiener index (H’) increased from 1.80 to 2.19, and the Pielou evenness in-
dex (J) rose from 0.63 to 0.79, indicating enhanced species distribution equilibrium and optimized community
structure. [Conclusion] The spatiotemporal distribution of zooplankton in Shanzai Reservoir is jointly driven
by external nutrient inputs and tilapia invasion. The study provides insights for ecological management and eu-
trophication control in reservoirs.
Key words: zooplankton; phytoplankton; spring; community; Shanzai Reservoir