三峡小江(澎溪河)藻类功能分组及其季节演替特点

藻类功能分组(phytoplankton functional classification)以藻种生理生长特征及其环境适应性机制为基础,在藻类生长的C-R-S策略分类基础上,对具有相同适应性特征的藻种进行分组,形成面向藻类集群生态属性的功能组别,便于更直接阐释生境变化对藻类集群的选择机制.本研究尝试将藻类功能分组运用...

Seasonal Succession of Phytoplankton Function Groups in the Xiaojiang (Pengxi) River Backwater Area, Three Gorges Reservoir

Phytoplankton function classification came from the physiological characteristics and habitat adaption of specific phytoplankton species, matching the growth strategy of the species with the habitat template. The phytoplankton functional groups were classified based on the C-R-S growth strategy and its favored habitat. Phytoplankton function classification was applied in this study to the backwater area of Xiaojiang (Pengxi) River (XBA) of the Yangtze in the Three Gorges Reservoir. 26 functional groups were classified based on the phytoplankton species data from May, 2007 to April, 2009. J/F/H1/P/L_O/LM/B/Y/G/C was the major functional groups in the 2-year survey, while functional groups of MP/D/X1/X2/W1/W2 were also dominant and frequently detected. The succession traits among 5 sampling spots were generally the same. Succession series of the functional groups between the 2 years showed distinct. However, seasonal succession of functional groups based on the C-R-S strategy showed to have some in common: S/CS type dominated in the spring, while in the summer flood season a co-occurrence of S/CS type and R/CR type was evident. From autumn, the succession from S/CS type to R/CR type which dominated in winter was remarkable. In the February to March, the shift from R/CR type in winter to S/CS type in the early spring was completed in a relatilve short time span.