NDLI: Effect of an invasive grass on ambient rates of decomposition and microbial community structure: a search for causality

Content Provider	Springer Nature Link
Author	Holly, D. Christopher Ervin, Gary N. Jackson, Colin R. Diehl, Susan V. Kirker, Grant T.
Copyright Year	2008
Abstract	In situ decomposition of above and belowground plant biomass of the native grass species Andropogon glomeratus (Walt.) B.S.P. and exotic Imperata cylindrica (L.) Beauv. (cogongrass) was investigated using litter bags over the course of a 12 month period. The above and belowground biomass of the invasive I. cylindrica always decomposed faster than that of the native A. glomeratus. Also, belowground biomass of both species decomposed at a consistently faster rate when placed within an invaded area consisting of a monotypic stand of I. cylindrica as opposed to within a native plant assemblage. However, there was no similar such trend observed in the aboveground plant material. The microbial communities associated with the invaded sites often differed from those found in the native vegetation and provide a possible causal mechanism by which to explain the observed differences in decomposition rates. The microbial communities differed not only compositionally, as indicated by ordination analyses, but also functionally with respect to enzymatic activity essential to the decomposition process. This study supports the growing consensus that invasive plant species alter normal ecological processes and highlights a possible mechanism (alteration of microbial assemblages) by which I. cylindrica may alter an ecosystem process (decomposition).
Starting Page	1855
Ending Page	1868
Page Count	14
File Format	PDF
ISSN	13873547
Journal	Biological Invasions
Volume Number	11
Issue Number	8
e-ISSN	15731464
Language	English
Publisher	Springer Netherlands
Publisher Date	2008-10-05
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Decomposition alteration DGGE Ecosystem modification Invasive plant species Microbial community analyses Microbial ecology T-RFLP Developmental Biology Ecology Plant Sciences Freshwater & Marine Ecology
Content Type	Text
Resource Type	Article
Subject	Ecology Ecology, Evolution, Behavior and Systematics

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