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Spatial and seasonal shifts in bloom‐forming cyanobacteria in L ake C haohu: Patterns and driving factors
Author(s) -
Zhang Min,
Zhang Yuchao,
Yang Zhen,
Wei Lijun,
Yang Wenbin,
Chen Chao,
Kong Fanxiang
Publication year - 2016
Publication title -
phycological research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.438
H-Index - 44
eISSN - 1440-1835
pISSN - 1322-0829
DOI - 10.1111/pre.12112
Subject(s) - cyanobacteria , anabaena , bloom , biology , dominance (genetics) , turbidity , algal bloom , nitrate , ecology , nutrient , phytoplankton , bacteria , biochemistry , genetics , gene
Summary The patterns of spatial and temporal shifts in bloom‐forming cyanobacteria and the driving factors for these patterns were determined by analyzing the distribution of these cyanobacteria in L ake C haohu using data from satellite images and field samples collected during 2012 and 2013. The cyanobacterial blooms primarily occupied the western region of L ake C haohu, and the direction and speed of the prevailing wind determined the spatial distribution of these blooms. The cyanobacteria in L ake C haohu were dominated by species of M icrocystis and A nabaena . M icrocystis reached its peak in J une, and Anabaena had peaks in M ay and N ovember, with an overall biomass that was higher than that of M icrocystis . M icrocystis generally occupied the western region of the lake in summer, whereas Anabaena dominated in other regions and seasons. Temperature may be responsible for these seasonal shifts. However, total phosphorus ( TP ), pH , temperature, turbidity and nitrate/nitrite nitrogen determined the coexistence of the two genera in different regions in summer. TP was correlated with M icrocystis dominance, and pH and light availability were correlated with A nabaena dominance. Our results contribute to the understanding of shifts in bloom‐forming cyanobacteria and are important for the control of cyanobacterial blooms.