生态环境学报2018，Vol.27Issue(1)：79-86,8.DOI:10.16258/j.cnki.1674-5906.2018.01.011
基于浮游植物群落的纵向连通性初步研究
Study on the Longitudinal Connectivity Based on Community Structure of Phytoplankton
摘要
Abstract
At present, there are few studies on the quantitative analysis of connectivity from the perspective of biocenology. The authors took the Shaying River with multiple gates as an object, and analyzed the effect of the connectivity of river on the phytoplankton community, and further tried to quantitative evaluate the river connectivity based on the characteristics of phytoplankton with the gradient analysis. The results showed that: there were 339 phytoplankton in Shaying River, which included 8 phylums. The most species were diatoms (170 species), followed by chlorophytes (93) and cyanobacteria (37). In view of seasons, the amount of phytoplankton species in summer and autumn was much higher than that of spring. From the view of the density and biomass of phytoplankton, Cryptophytes were the dominant phytoplankton, but Cyanobacteria density was highest in summer. In the top 10 of degree of dominance, there were 4 species of cyanobacteria, 3 species of cryptomophytes, 2 speceis of diatoms and 1 species of chlorophyte. Comparing the seasonal composition and variation of phytoplankton community, the river barriers had a great effect on the community. The community composition of the Shaying River had been transformed from the river-type community with an advantage of diatoms to the lake-type community with an advantage of cyanophytes. According to the first length of DCA (Detrended Correspondence Analysis), the gradient analysis was performed using the PCA (Principal Component Analysis) and the corresponding ordination diagram was drawn. From the diagram, the different sections could be separated, which indicated there were obvious differences in the community structure among the sections of various river gates. According to the relative position of all phytoplankton community and the relative sequence of river gates, a potential gradient representing the river connectivity can be found, and thus the river connectivity can be quantitatively described from the perspective of phytoplankton community, which will help to establish a method for characterizing the connectivity of river based on biota.关键词
纵向连通性/浮游植物/排序/群落结构Key words
longitudinal connectivity/phytoplankton/ordination/community structure分类
农业科技引用本文复制引用
胡俊,舒卫先,韦翠珍,陈明秀,池仕运,胡菊香..基于浮游植物群落的纵向连通性初步研究[J].生态环境学报,2018,27(1):79-86,8.基金项目
国家自然科学基金项目(51409178) （51409178）
水利部公益性行业科研专项(201501030) （201501030）
国家重点研发计划项目(2017YFC0405303) （2017YFC0405303）
