DOI: 10.1007/s10533-015-0164-6
Scopus记录号: 2-s2.0-84951568690
论文题名: Exotic earthworm community composition interacts with soil texture to affect redistribution and retention of litter-derived C and N in northern temperate forest soils
作者: Crumsey J.M. ; Capowiez Y. ; Goodsitt M.M. ; Larson S. ; Le Moine J.M. ; Bird J.A. ; Kling G.W. ; Nadelhoffer K.J.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 126, 期: 3 起始页码: 379
结束页码: 395
语种: 英语
英文关键词: Carbon
; Exotic earthworm community
; Leaf litter
; Nitrogen
; Stable isotope tracer
; Temperate forest soil
; X-ray computed tomography
Scopus关键词: carbon
; community composition
; earthworm
; forest soil
; leaf litter
; nitrogen
; soil biota
; soil texture
; Spodosol
; temperate forest
; Acer rubrum
英文摘要: Exotic earthworm impacts on temperate forest soils are influenced by earthworm community composition and are likely constrained by the degree of organic matter redistribution following earthworm introductions across different soil types; however, the relative importance of these factors remains unknown. We examined how exotic earthworm communities affected leaf litter carbon (C) and nitrogen (N) mineralization and transport in two Spodosols with contrasting textures and organic matter contents. In reconstructed soil mesocosms, we measured organic C pools, quantified 13C and 15N transport from isotopically labeled red maple (Acer rubrum) leaf litter, and linked leaf litter redistribution to sub-surface burrow system structures following 150-day incubations. Transport of C and N from surface litter into soil was greatest with multi-species earthworm communities, and A-horizon and burrow pools functioned as dominant sinks for this material. Litter-derived C:N recovery ratios of soil pools revealed higher retention of litter-derived N over litter-derived C; recovery of litter N (mg 15N m−2) transported from surface litter was greater in the sandy loam (98.2 ± 2.73 %) than in the sandy soil (66.2 ± 4.92 %) following earthworm community additions. Earthworm biomass was as a minor sink for litter C (mg 13C m−2) and N transported from surface litter (0.56 ± 0.13 and 2.26 ± 0.31 %, respectively). Recovery of litter-derived C and N in earthworm biomass increased with the degree of direct leaf litter consumption (A. trapezoides < E. fetida < L. terrestris). Surface-dwelling epigeic and mineral-soil dwelling endogeic species produced burrow systems with the highest volume, surface connectivity, and density in the A-horizon; these properties were associated with greater CO2 losses and with greater litter C and N transport into A-horizons and burrows. Burrow systems with high continuity and large burrows produced by vertical-burrowing anecic species were associated with greater litter C and N transport into B-horizons, and greater dissolved organic C leaching losses. This study shows that the degree of organic matter redistribution in temperate forest soils following earthworm introductions is directly related to earthworm community composition, while the preferential retention of N over C and the potential stabilization of this material is determined by soil type. © 2015, Springer International Publishing Switzerland. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83443
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, MI, United States; French National Institute for Agricultural Research - Institut National de la Recherche Agronomique (INRA), UR 1115 Plantes et Systèmes Horticoles, Avignon Cedex 09, France; Department of Radiology, University of Michigan, Ann Arbor, MI, United States; School of Earth and Environmental Sciences, Queens College, City University of New York, Flushing, NY, United States; Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY, United States
Recommended Citation:
Crumsey J.M.,Capowiez Y.,Goodsitt M.M.,et al. Exotic earthworm community composition interacts with soil texture to affect redistribution and retention of litter-derived C and N in northern temperate forest soils[J]. Biogeochemistry,2015-01-01,126(3)