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language
eng
Author
Jang, Ji Eun
Yamamoto, Hiroki
Description
Due to the high importance of biofilms on river ecosystems, assessment of pesticides’ adverse effects is necessary but is impaired by high variability and poor reproducibility of both natural biofilms and those developed in the laboratory. We constructed a model biofilm to evaluate the effects of pesticides, consisting in cultured microbial strains, Pedobacter sp. 7-11, Aquaspirillum sp. T-5, Stenotrophomonas sp. 3-7, Achnanthes minutissima N71, Nitzschia palea N489, and/or Cyclotella meneghiniana N803. Microbial cell numbers, esterase activity, chlorophyll-a content, and the community structure of the model biofilm were examined and found to be useful as biological factors for evaluating the pesticide effects. The model biofilm was formed through the cooperative interaction of bacteria and diatoms, and a preliminary experiment using the herbicide atrazine, which inhibits diatom growth, indicated that the adverse effect on diatoms inhibited indirectly the bacterial growth and activity and, thus, the formation of the model biofilm. Toxicological tests using model biofilms could be useful for evaluating the pesticide effects and complementary to studies on actual river biofilms.
Journal Title
Archives of Environmental Contamination and Toxicology
Volume
60
Issue
1
Start Page
44
End Page
56
ISSN
00904341
Published Date
2011-01
DOI
NCID
AA00547363
Publisher
Springer Verlag
NII Type
Journal Article
Format
PDF
Resource URL(IsVersionOf)
http://link.springer.com/article/10.1007/s00244-010-9531-4
Rights
© Springer Science+Business Media, LLC 2010
Text Version
著者版
OAI-PMH Set
Faculty of Life and Environmental Science
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