DOI: 10.1111/gcb.14132
Scopus记录号: 2-s2.0-85045404430
论文题名: Tree mycorrhizal type predicts within-site variability in the storage and distribution of soil organic matter
作者: Craig M.E. ; Turner B.L. ; Liang C. ; Clay K. ; Johnson D.J. ; Phillips R.P.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期: 8 起始页码: 3317
结束页码: 3330
语种: 英语
英文关键词: amino sugars
; decomposition
; MEMs hypothesis
; mineral-associated
; mycorrhizal fungi
; soil carbon
; soil depth
; soil nitrogen
; temperate forest
Scopus关键词: decomposition
; fungus
; mineral
; mycorrhiza
; soil carbon
; soil depth
; soil nitrogen
; soil organic matter
; sugar
; temperate forest
; tree
; Fungi
英文摘要: Forest soils store large amounts of carbon (C) and nitrogen (N), yet how predicted shifts in forest composition will impact long-term C and N persistence remains poorly understood. A recent hypothesis predicts that soils under trees associated with arbuscular mycorrhizas (AM) store less C than soils dominated by trees associated with ectomycorrhizas (ECM), due to slower decomposition in ECM-dominated forests. However, an incipient hypothesis predicts that systems with rapid decomposition—e.g. most AM-dominated forests—enhance soil organic matter (SOM) stabilization by accelerating the production of microbial residues. To address these contrasting predictions, we quantified soil C and N to 1 m depth across gradients of ECM-dominance in three temperate forests. By focusing on sites where AM- and ECM-plants co-occur, our analysis controls for climatic factors that covary with mycorrhizal dominance across broad scales. We found that while ECM stands contain more SOM in topsoil, AM stands contain more SOM when subsoil to 1 m depth is included. Biomarkers and soil fractionations reveal that these patterns are driven by an accumulation of microbial residues in AM-dominated soils. Collectively, our results support emerging theory on SOM formation, demonstrate the importance of subsurface soils in mediating plant effects on soil C and N, and indicate that shifts in the mycorrhizal composition of temperate forests may alter the stabilization of SOM. © 2018 John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110294
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
There are no files associated with this item.
作者单位: Department of Biology, Indiana University, Bloomington, IN, United States; Smithsonian Tropical Research Institute, Balboa, Ancon, Panama; Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China; Los Alamos National Laboratory, Los Alamos, NM, United States
Recommended Citation:
Craig M.E.,Turner B.L.,Liang C.,et al. Tree mycorrhizal type predicts within-site variability in the storage and distribution of soil organic matter[J]. Global Change Biology,2018-01-01,24(8)