三江自然保护区5月浮游植物功能群研究及水质评价

Study on Phytoplankton Functional Group and Water Quality Evaluation in May of Sanjiang Nature Reserve

摘要: 为研究分析三江自然保护区浮游植物多样性，从2017年春季对三江自然保护区的16个采样点采集浮游植物样品，进行系统分析，为湿地水质评价奠定基础。分析这16个样点浮游植物功能群的组成特征，共划分出18个功能群，其中重要的功能群为MP和Y功能群，分别占58.9%和13.7%。通过Shanno-Weaver多样性指数和Pielou均匀度指数对三江自然保护区的水质进行评价，多数采样点处于轻度或无污染状态，整体水质较为良好，但需要即时监测浮游植物动态变化。RDA分析结果显示，影响春季浮游植物功能群最重要的理化因子为Chla、pH和Cond，其次为 ，浮游植物功能群WS、D和MP与叶绿素呈正相关，浮游植物功能群W1、P和H1与叶绿素呈负相关。浮游植物功能群Y、S1、TB和C与pH、硝酸根呈正相关，而L0、J、X1、X2、F和N功能群等与理化环境因子的相关性不明显。

Abstract: In order to study and analyze the diversity of phytoplankton in Sanjiang Nature Reserve, phyto-plankton samples were collected from 16 sampling points of Sanjiang Nature Reserve in the spring of 2017, and systematic analysis was carried out to lay a foundation for wetland water quality evaluation. The composition characteristics of these 16 sample phytoplankton functional groups were analyzed, and 18 functional groups were divided. The important functional groups were MP and Y functional groups, accounting for 58.9% and 13.7%, respectively. The Shanno-Weaver di-versity index and the Pielou evenness index evaluate the water quality of the Sanjiang Nature Re-serve. Most of the sampling points are in a mild or non-polluting state, and the overall water quality is relatively good, but the dynamic changes of phytoplankton need to be monitored immediately. The results of RDA analysis showed that the most important physical and chemical factors affecting the phytoplankton functional group were Chla, pH and Cond, followed by  ; phytoplankton functional groups WS, D and MP were positively correlated with chlorophyll; phytoplankton functional groups W1, P and H1 are negatively correlated with chlorophyll. The phytoplankton functional groups Y, S1, TB and C were positively correlated with pH and nitrate, while the correlations between L0, J, X1, X2, F and N functional groups and physical and chemical envi-ronmental factors were not obvious.