NDLI: Does the influence of earthworms on water infiltration, nitrogen leaching and soil respiration depend on the initial soil bulk density? A mesocosm experiment with the endogeic species Metaphire posthuma

Content Provider	Springer Nature Link
Author	Jouquet, Pascal Huchet, Gaëlle Bottinelli, Nicolas Thu, Thuy Doan Duc, Toan Tran
Copyright Year	2011
Abstract	Soil compaction has a negative impact on both earthworm abundance and diversity. Recent studies, however, suggest that earthworm cast properties are not influenced by the initial soil bulk density. With time, earthworms could therefore transform soils with different bulk densities into a soil with the same physical state and thus with a similar ecological functioning. This study aimed to test this hypothesis in two laboratory incubation experiments. First, we measured the influence of soil bulk density (1.1 or 1.4 g cm−3) on the production of cast by the endogeic earthworm species Metaphire posthuma. In a second experiment, we investigated the effect of M. posthuma on water infiltration, NH 4 + , and NO 3 − leaching and soil respiration at the same two soil bulk densities. Although initially higher, earthworm casting activity in soil at 1.4 g cm−3 decreased until it reached the same level of activity as earthworms in soil at 1.1 g cm−3. This behavioral plasticity led to a transformation of compacted and loose soils, with their own functioning, to a third and similar state with similar hydraulic conductivity, nitrogen leaching, and soil respiration. The consequences for soil organization and soil functioning are discussed.
Starting Page	561
Ending Page	567
Page Count	7
File Format	PDF
ISSN	01782762
Journal	Biology and Fertility of Soils
Volume Number	48
Issue Number	5
e-ISSN	14320789
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-01-04
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Earthworms Metaphire posthuma Soil bulk density Soil organic matter Nitrogen leaching Soil organization Agriculture Soil Science & Conservation
Content Type	Text
Resource Type	Article
Subject	Agronomy and Crop Science Soil Science Microbiology

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