BIOACCUMULATION OF THE HEPATOTOXIC MICROCYSTINS IN VARIOUS ORGANS OF A FRESHWATER SNAIL FROM A SUBTROPICAL CHINESE LAKE, TAIHU LAKE, WITH DENSE TOXIC MICROCYSTIS BLOOMS

2007 ◽  
Vol 26 (1) ◽  
pp. 171 ◽  
Author(s):  
Dawen Zhang ◽  
Ping Xie ◽  
Yaqin Liu ◽  
Jun Chen ◽  
Gaodao Liang
Keyword(s):  
Taihu Lake ◽  
Lake Taihu ◽  
Freshwater Snail ◽  
Microcystis Blooms ◽  
Chinese Lake

Composition of the archaeal community involved in methane production during the decomposition of Microcystis blooms in the laboratory

2012 ◽  
Vol 58 (10) ◽  
pp. 1153-1158 ◽  
Author(s):  
Peng Xing ◽  
Huabing Li ◽  
Qing Liu ◽  
Jiuwen Zheng
Keyword(s):  
Lake Taihu ◽  
Archaeal Community ◽  
Oxygen Depletion ◽  
16S Rrna Genes ◽  
Rrna Genes ◽  
Polymorphism Analysis ◽  
Methanogenic Community ◽  
Controlled Systems ◽  
Microcystis Blooms ◽  
Different Temperatures

We investigated the microbial processes involved in methane (CH4) production from Microcystis bloom scums at different temperatures. A Microcystis slurry was collected from Lake Taihu and incubated in airtight bottles at 15, 25, and 35 °C. The production of CH4 was monitored, and the emission rate was calculated. The dynamics of the methanogenic community were analyzed by terminal restriction fragment length polymorphism analysis of archaeal 16S rRNA genes. Phylogenetic information for the methanogens was obtained by cloning and sequencing selected samples. Significant CH4 emission from the Microcystis scums was delayed by approximately 12 days by the natural oxygen depletion process, and CH4 production was enhanced at higher temperatures. Phylogenetic analysis indicated that the archaeal community was composed of Methanomicrobiales, Methanobacteriaceae, and a novel cluster of Archaea. An apparent succession of the methanogenic community was demonstrated, with a predominance of Methanobacteriaceae at higher temperatures. Higher temperatures enhanced the methanogenic transformation of the Microcystis biomass and the phylogenetic dominance of hydrogenotrophic methanogens, suggesting that H2 and CO2 might be the primary substrates for CH4 production during Microcystis decomposition without the participation of lake sediment. This work provides insight into the microbial components involved in Microcystis biomass fermentation in controlled systems.

scholarly journals Large-scale field evidence on the enhancement of small-sized cladocerans by Microcystis blooms in Lake Taihu, China

2012 ◽  
Vol 34 (10) ◽  
pp. 853-863 ◽  
Author(s):  
X. Sun ◽  
M. Tao ◽  
B. Qin ◽  
M. Qi ◽  
Y. Niu ◽  
...  
Keyword(s):  
Large Scale ◽  
Lake Taihu ◽  
Field Evidence ◽  
Microcystis Blooms ◽  
Scale Field ◽  
Large Scale Field
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