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Diversity of Metazoan Zooplankton and Its Relationship with Water Environmental Factors in Da’ao Reservoir
LIU Xi, LEI Ming-jun, HUANG Xiao-long, WANG Meng-xue, LEI Qi
Journal of Changjiang River Scientific Research Institute ›› 2024, Vol. 41 ›› Issue (9) : 53-59.
PDF(1820 KB)
PDF(1820 KB)
Diversity of Metazoan Zooplankton and Its Relationship with Water Environmental Factors in Da’ao Reservoir
To elucidate the community structure characteristics of metazoan zooplankton in Da’ao Reservoir and provide foundational data for assessing aquatic ecological health, we conducted two ecological surveys in August (wet season) and November (dry season) of 2021. The results are as follows: (1) We identified 26 species of metazoan zooplankton in Da’ao Reservoir, including 13 species of rotifers, 4 species of cladocerans, and 9 species of copepods. Dominant species included Keratella cochlearis, Polyarthra trigla, Diurella dixonnuttalli, Trichocerca pusilla, Pompholyxophrys trichocerca, Cylindrical Trichocerca, and Bosmina sp. (2) The density and biomass of metazoan zooplankton were higher during wet season (August) compared to dry season (November). (3) The average Shannon-Wiener index for metazoan zooplankton was 0.88 in wet season and 1.05 in dry season. Principal Coordinates Analysis (PCoA) revealed spatial distribution differences in the community structure during wet season; (4) Redundancy Analysis (RDA) indicated that the cumulative variation in species-environment relationships explained 62.4% and 65.1% of the total variation in wet and dry seasons, respectively. The permanganate index emerged as the primary driving factor influencing changes in the community structure of metazoan zooplankton in Da’ao Reservoir.
Da’ao Reservoir / meta-zooplankton / diversity / environmental factors
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