上海海洋大学学报2025，Vol.34Issue(1)：56-68,13.DOI:10.12024/jsou.20241004659
上海城市河网冬季浮游植物功能群群落构建机制及其驱动因素
Phytoplankton functional groups community assembly mechanisms and driving factors in Shanghai river network in winter
摘要
Abstract
Phytoplankton is an important primary producer of water,and its functional group characteristics play an important role in maintaining the stability of aquatic ecosystems.In order to reveal the characteristics and construction mechanism of phytoplankton functional group community and its driving factors in river networks of megacity,19 representative small and medium-sized rivers in Shanghai were selected to investigate the characteristics of phytoplankton functional groups and environmental factors at 40 sites.The results showed that a total of 175 species of phytoplankton in 8 phyla were identified,which could be divided into 23 functional groups,and B,D,J,MP,P,S1,X1,X2,X3 and Y were the dominant functional groups.The results of cluster analysis showed that 40 sampling sites could be divided into two characteristic groups:low nutrient(G1)and high nutrient(G2).There were significant differences in Shannon-Wiener diversity index,Margalef index,phytoplankton functional group community structure and environmental factors between the two groups(P＜0.05).The modified stochasticity ratio(MST)and the decay relationship analysis showed that the community construction of phytoplankton functional groups in Shanghai River was affected by the environmental filtering and spatial diffusion limitation,and the stochastic process was dominant.The community construction of the low nutrient group(G1)was affected by environmental filtration,while the spatial diffusion affected the construction of phytoplankton functional groups in the higher nutrient group(G2).Difference analysis and multiple regression analysis showed that total nitrogen,nitrite nitrogen,total phosphorus,conductivity and dissolved oxygen were the main environmental factors affecting the community structure of phytoplankton functional groups in Shanghai River.This study provides new information for in-depth understanding of the biodiversity and ecological function maintenance mechanism of river networks in megacities,as well as the protection of water ecosystems in urban river networks.关键词
城市河道/浮游植物/功能群/环境过滤作用/随机性过程Key words
urban river/phytoplankton/functional groups/environmental filtering effect/stochastic process分类
生物科学引用本文复制引用
邢雅微,卢智灵,王婷,徐肖莹,王丽卿,张玮..上海城市河网冬季浮游植物功能群群落构建机制及其驱动因素[J].上海海洋大学学报,2025,34(1):56-68,13.基金项目
上海市科学技术委员会项目(19DZ1204504) （19DZ1204504）
上海市水务局项目(11N78361358220211402) （11N78361358220211402）
