Title |
Dominant genera of cyanobacteria in Lake Taihu and their relationships with environmental factors |
Author |
Lijun Feng, Shiyou Liu, Wenxian Wu, Jiawen Ma, Pei Li, Hailing Xu, Na Li*, and Yaoyu Feng |
Address |
School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China |
Bibliography |
Journal of Microbiology, 54(7),468-476, 2016,
|
DOI |
10.1007/s12275-016-6037-4
|
Key Words |
cyanobacterial bloom, Lake Taihu, cyanobacterial community structure, Microcystis, Synechococcus |
Abstract |
Cyanobacterial blooms in freshwaters have become one of the
most widespread of environmental problems and threaten
water resources worldwide. Previous studies on cyanobacteria
in Lake Taihu often collected samples from one site (like
Meiliang Bay or Zhushan Bay) and focused on the variation
in patterns or abundance of Microcystis during the blooming
season. However, the distribution of cyanobacteria in Lake
Taihu shows differing pattern in various seasons. In this
study, water samples were collected monthly for one year at
five sites in Lake Taihu with different trophic status and a
physicochemical analysis and denaturing gradient gel electrophoresis
(DGGE) were conducted. DGGE fingerprint analysis
showed that Microcystis (7/35 bands) and Synechococcus
(12/35 bands) were the two most dominant genera present
during the study period at all five sites. Cyanobium (3/35
bands) was the third most common genus which has seldom
been previously reported in Lake Taihu. Redundancy analysis
(RDA) indicated that the cyanobacterial community
structure was significantly correlated with NO3
--N, CODMn,
and NH4
+-N in the winter and spring, whereas it was correlated
with water temperature in the summer and autumn.
Limiting the nutrient input (especially of N and C loading) in
Lake Taihu would be a key factor in controlling the growth
of different genera of cyanobacteria. |