Phytoplankton functional groups and their spatial and temporal distribution characteristics in Hongfeng Reservoir,Guizhou Province

Hongfeng Reservoir is located at Guizhou Province,which has the most widely distributed and the most complex types of karst.The reservoir is one of the sources for drinking water for Guiyang city.Besides,it has many other functions,such as agricultural irrigation,flood control,and tourism.Management of the eco-environment and water resources of this reservoir are important for sustainable development of this area.This study identifiedfunctional groups of phytoplankton to understand the distribution patterns of the Hongfeng Reservoir,which is different from the traditional approach of community identification.Phytoplankton and water samples were collected in dry period(November 2012),level period(April 2013),and flood period(July 2013).In total,25 functional groups of phytoplankton were identified,wherein,the groups S1,F,J,B,D,S2,Y,and LMwere comparatively common functional groups,and the groups W1,A,W2,K,and X3 were less common.Habitat characteristics of the main functional groups that are adapted to the eutr