DOI: 10.1016/j.foreco.2016.10.036
Scopus记录号: 2-s2.0-84999636313
论文题名: Plant-microbe interactions regulate carbon and nitrogen accumulation in forest soils
作者: Winsome T. ; Silva L.C.R. ; Scow K.M. ; Doane T.A. ; Powers R.F. ; Horwath W.R.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2017
卷: 384 起始页码: 415
结束页码: 423
语种: 英语
英文关键词: Biodiversity
; Nutrient cycling
; Soil organic matter
; Sustainability
Scopus关键词: Biodiversity
; Forestry
; Microorganisms
; Mixtures
; Nitrogen
; Nutrients
; Productivity
; Sustainable development
; Laboratory experiments
; Microbial community composition
; Nutrient cycling
; Plant-microbe interactions
; Soil microbial biomass
; Soil microbial community
; Soil organic matters
; Understory vegetation
; Soils
; biodiversity
; carbon sequestration
; community composition
; forest soil
; litter
; microbial community
; nitrogen
; nutrient cycling
; soil carbon
; soil microorganism
; soil organic matter
; sustainability
; understory
; Pinus ponderosa
英文摘要: Understory removal is a common practice in forest plantations, which is aimed at reducing competition for resources and increasing the productivity of target tree species. Recent studies have shown, however, that the presence of understory vegetation can increase soil carbon and nutrient content, especially where N-fixing species are present. To investigate whether this response can be attributed to changes in soil microbial communities, we conducted experiments with isotopically-labeled litter in Pinus ponderosa stands where N-fixing understory species were present (UP) or absent (UA). We measured carbon and nutrient stocks and monitored changes in soil microbial biomass and composition. Field and laboratory experiments strongly suggest that understory suppression and relatively small changes in litter quality can yield significant changes in soil C and N stocks, which are critical to maintaining forest productivity. We detected a greater accumulation of carbon and nitrogen (relative to controls) when mixtures of pine and N-rich litter were applied to the soil. In contrast, soils amended only with pine litter showed a net loss of carbon and nitrogen stocks. Soil microbial biomass was significantly higher in UP than in UA stands and microbial community composition varied with type of litter inputs and incubation time (0–180 days), but not as a function of understory management. Similar results were obtained from field experiments, in which mesocosms were incubated for ∼2.5 years with pine and N-rich understory litter mixtures. The suppression of understory species caused a decline in litter-derived carbon and nitrogen in the soil, even when the microbial community was resilient to the imposed treatments. © 2016 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64604
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Biological Sciences, Mission College, Mission College Boulevard, Santa Clara, United States; Environmental Studies Program and Department of Geography, University of Oregon, Eugene, United States; Department of Land, Air & Water Resources, University of California, Davis, United States; Silviculture Laboratory, Pacific-Southwest Research Station, USDA-Forest Service, Redding, United States
Recommended Citation:
Winsome T.,Silva L.C.R.,Scow K.M.,et al. Plant-microbe interactions regulate carbon and nitrogen accumulation in forest soils[J]. Forest Ecology and Management,2017-01-01,384