Open AccessImpact of environmental factors on couplings between bacterial community composition and ectoenzymatic activities in a lacustrine ecosystem
Author(s) -
Boucher Delphine,
Debroas Didier
Publication year - 2009
Publication title -
fems microbiology ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.377
H-Index - 155
eISSN - 1574-6941
pISSN - 0168-6496
DOI - 10.1111/j.1574-6941.2009.00730.x
Subject(s) - biology , ecosystem , terminal restriction fragment length polymorphism , aminopeptidase , nutrient , community structure , biodiversity , leucine , ecology , composition (language) , restriction fragment length polymorphism , biochemistry , amino acid , polymerase chain reaction , gene , linguistics , philosophy
This study examined the effects of temporal changes in bacterial community composition (BCC) and environmental factors on potential ectoenzymatic activities (α‐glucosidase, β‐glucosidase, alkaline phosphatase and leucine aminopeptidase) in a lacustrine ecosystem (Sep reservoir, France). BCC was assessed by terminal restriction fragment length polymorphism. Physical parameters, and inorganic and organic nutrient concentrations (dissolved carbohydrates and proteins) were measured in lakes and tributaries. According to the multivariate statistics (redundancy analysis), physical and chemical factors explained the largest part of leucine aminopeptidase activity, whereas the temporal changes of other ectoenzymatic activities were partly dependent on the variations in the BCC. In particular, the occurrence of occasional bacterial populations seemed to explain a lot of the variation in rates and patterns of polymer hydrolysis. The relation observed in this study between the bacterial structure and activity is discussed within the framework of biodiversity–ecosystem functioning.