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Effect of Microcystis aeruginosa on the rotifer Brachionus calyciflorus at different temperatures.
MedLine Citation:
PMID:  22057279     Owner:  NLM     Status:  Publisher    
Rotifers are one of the smallest metazoans. They serve as a model organism for ecotoxicological studies. More than 60% of the lakes in China are increasingly eutrophic and they are susceptible to blooms of Microcystis aeruginosa. We investigated the effects of M. aeruginosa on the survival and reproduction of Brachionus calyciflorus using the life table method at different temperatures. The findings showed that concentration of M. aeruginosa significantly affected the intrinsic rate of increase (r(m)), net reproductive rate (R(0)), average lifespan (L) and offspring number (p < 0.05). Temperature also significantly affected the generation time (T), average lifespan (L) and offspring number (p < 0.05). Moreover, the interaction between temperature and concentration had statistically significant effects on offspring number (p < 0.05). M. aeruginosa suppressed the survival and reproduction of B. calyciflorus, particularly at a concentration of 10(6) cells/mL. The r(m) values of the rotifers exposed at 10(6) cells/mL decreased more than 200% compared with those of the control group. However, at a lower concentration, 10(4) cells/mL, M. aeruginosa may supply appropriate nourishment to rotifers. In addition, at concentrations of 10(5) and 10(6) cells/mL, the inhibition of rotifers by M. aeruginosa heightened with increasing temperature.
Xiong Zhang; Hong Geng
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-11-6
Journal Detail:
Title:  Bulletin of environmental contamination and toxicology     Volume:  -     ISSN:  1432-0800     ISO Abbreviation:  -     Publication Date:  2011 Nov 
Date Detail:
Created Date:  2011-11-7     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0046021     Medline TA:  Bull Environ Contam Toxicol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Key Laboratory for Microorganism and Bio-transformation, College of Life Science, South-Central University for Nationalities, Wuhan, 430074, China.
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