Characterization of the Community Structure of Metazooplankton in a Typical Marshy Wetland in Momoge and Its Influencing Factors
Zooplankton as a significant biological constituent within the wetland food web,plays a crucial role in the assessment of wetland water quality and system health.To investigate the effects of environmental fac-tors on the community structure of metazooplankton in typical northern swamp wetlands,a study was conduct-ed in July 2023 in the Momoge National Nature Reserve in Jilin Province.A total of 24 sampling sites were es-tablished in typical swamp wetlands(12 in shallow water zones and 12 in deep water zones).Surveys of meta-zooplankton and water environmental factors were conducted,and a comparative analysis was performed to explore the structural characteristics of metazooplankton communities as well as their influencing factors in both shallow water and deep water zones.The results of the study revealed that a total of 84 metazooplankton species were documented,among which rotifers constituted the dominant group with 50 species.The average abundance and biomass of metazooplankton were 18.10 ind./L and 50.46 μg/L,respectively.There were six dominant species overall,with five found in shallow waters and four in deep waters.The Pielou evenness in-dex for metazooplankton communities was significantly higher in shallow waters than in deep waters,whereas the Shannon-Wiener diversity index and Margalef richness index showed no significant difference between the two regions.The results of non-metric multidimensional scaling analysis demonstrated that the community structure of rotifer groups exhibited large spatial variations,while the communities of copepods and cladocer-ans presented small differences.Water depth(WD),nitrate-nitrogen concentration(NO3--N),total nitrogen con-tent(TN),and total phosphorus(TP)content have been identified as the principal environmental factors influ-encing the community structure of metazooplankton.
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万方数据
