NDLI: The wave towards a new steady state: effects of earthworm invasion on soil microbial functions

Content Provider	Springer Nature Link
Author	Eisenhauer, Nico Schlaghamerský, Jiří Reich, Peter B. Frelich, Lee E.
Copyright Year	2011
Abstract	Earthworms are ecosystem engineers that cause a long cascade of ecological effects when they invade previously earthworm-free forests. However, the consequences of earthworm invasion for soil microbial functions are poorly understood. Here, we used two well-studied invasion fronts of European earthworms in northern North American hardwood forests previously devoid of earthworms in order to investigate three stages of earthworm invasion: uninvaded, the front of the leading edge of earthworm invasion and locations invaded at least 10 years previously. Soil microbial biomass, respiration and metabolic quotient were measured. Earthworms had marked effects on soil microbial biomass (−42%) and respiration (−32%). At both sites, impacts were most pronounced at the leading edge of the invasion front, significantly decreasing soil microbial C use efficiency. This was most likely due to the disturbance of the soil microbial community caused by water stress. Based on these results, we hypothesize that effects of earthworm invasion on native soil ecosystem functioning are most pronounced at the peak of the invasion wave. After experiencing this wave, ecosystems possibly enter a new steady state with altered biotic compositions and functions.
Starting Page	2191
Ending Page	2196
Page Count	6
File Format	PDF
ISSN	13873547
Journal	Biological Invasions
Volume Number	13
Issue Number	10
e-ISSN	15731464
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-07-06
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ecosystem change Exotic earthworms Forest floor Microbial biomass Microbial respiration Northern hardwood forests Plant Sciences Freshwater & Marine Ecology Developmental Biology Ecology
Content Type	Text
Resource Type	Article
Subject	Ecology Ecology, Evolution, Behavior and Systematics

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