NDLI: Leaf Litter Disappearance in Earthworm-Invaded Northern Hardwood Forests: Role of Tree Species and the Chemistry and Diversity of Litter

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Leaf Litter Disappearance in Earthworm-Invaded Northern Hardwood Forests: Role of Tree Species and the Chemistry and Diversity of Litter

Content Provider	Springer Nature Link
Author	Holdsworth, Andrew R. Frelich, Lee E. Reich, Peter B.
Copyright Year	2012
Abstract	Earthworm invasion in North American temperate forest reduces forest floor mass, yet the interactions between litter composition, invasive earthworm community composition, and forest floor structure and composition are not well understood. For 2 years, we compared disappearance of leaf litter in field mesocosms in which we manipulated litter composition (monocultures of Quercus rubra, Acer saccharum, and Tilia americana litter, and an equal mixture of all three) and thereby the initial litter chemistry (C, C fractions, N, Ca) in sites with and without the major litter-feeding invasive earthworm species. The disappearance of litter mass followed the same ranking at both the sites: T. americana > equal mixtures > A. saccharum ≥ Q. rubra. However, differences in disappearance rate between the sites depended on litter composition and time. The differences in mass loss among litters of different compositions were greatest at the site invaded by the large litter-feeding earthworm, Lumbricus terrestris, and especially for T. americana and the mixture. Similarly, observed disappearance of the litter mixture was faster than predicted by an additive model at the site with L. terrestris, especially for the higher quality litter component in early summer. Initial litter calcium content was the best predictor (R 2 ≥ 0.90) of overall litter mass remaining each year, supporting the idea of the importance of calcium in forest floor dynamics, especially in the presence of calciferous, invasive earthworms.
Starting Page	913
Ending Page	926
Page Count	14
File Format	PDF
ISSN	14329840
Journal	Ecosystems
Volume Number	15
Issue Number	6
e-ISSN	14350629
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-05-30
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	decomposition earthworm invasion northern hardwood forest Acer saccharum Quercus rubra Tilia americana Lumbricus terrestris calcium lignin litter mesocosms Geoecology/Natural Processes Environmental Management Plant Sciences Ecology Nature Conservation Zoology
Content Type	Text
Resource Type	Article
Subject	Ecology Environmental Chemistry Ecology, Evolution, Behavior and Systematics

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Leaf Litter Disappearance in Earthworm-Invaded Northern Hardwood Forests: Role of Tree Species and the Chemistry and Diversity of Litter

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Leaf Litter Disappearance in Earthworm-Invaded Northern Hardwood Forests: Role of Tree Species and the Chemistry and Diversity of Litter