DOI: 10.1016/j.foreco.2017.08.053
Scopus记录号: 2-s2.0-85029724889
论文题名: European beech deadwood can increase soil organic carbon sequestration in forest topsoils
作者: Wambsganss J. ; Stutz K.P. ; Lang F.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2017
卷: 405 起始页码: 200
结束页码: 209
语种: 英语
英文关键词: Coarse woody debris
; Density fractionation
; Forest management
; Soil aggregate
; SOM stability
Scopus关键词: Aggregates
; Bioactivity
; Biogeochemistry
; Biological materials
; Ecosystems
; Forestry
; Organic carbon
; Organic compounds
; Silicates
; Soil testing
; Soils
; Stabilization
; Coarse woody debris
; Density fractionations
; Dissolved organic matters
; European beech (fagus sylvatica l.)
; Particulate organic matters
; Soil aggregate
; Soil organic carbon sequestration
; Stabilization process
; Decay (organic)
; Fagus sylvatica
英文摘要: Deadwood plays a crucial role in forest ecosystems, yet its impact on soil properties and specifically soil organic matter (SOM) stabilization is hitherto not fully understood or studied. We hypothesized that downed deadwood would enhance the light, labile SOM fraction in forest topsoils, and that those changes would be enhanced by advanced decay and higher rates of soil bioturbation that would move deadwood fragments into mineral soil. To test our hypotheses, we took topsoil samples directly next to European beech (Fagus sylvatica L.) downed deadwood and samples from paired reference points at eight stands in Southwest Germany. From those samples we separated SOM into three density fractions linked to physical and chemical SOM stabilization processes: the free light fraction, the aggregate-occluded light fraction and the mineral-adsorbed heavy fraction. On silicate bedrock, deadwood increased the free light fraction by 57% (6.0±4.2 mg g−1) compared to reference points. In contrast on calcareous bedrock, deadwood decreased the free light fraction by 23% (9.0±3.5 mg g−1) compared to reference points. Deadwood with advanced decay from all sites increased the aggregate-occluded light fraction by 40% (3.7±1.1 mg g−1) as well as total soil organic carbon (SOC) stocks by 24% (12.8±4.5 mg cm−3) as compared to reference points. In summary, the light fraction of SOM was affected by deadwood depending on site conditions and the more stable, aggregate-occluded fraction eventually increased near decayed deadwood through interactions between stimulated biological activity and both particulate and dissolved organic matter. Altogether these results indicate that deadwood increases SOC stocks at sites where SOM decomposition is slow enough to enable occlusion of particulate organic matter within aggregates. © 2017 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64075
Appears in Collections: 影响、适应和脆弱性
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作者单位: Chair of Soil Ecology, Institute of Forest Sciences, University of Freiburg, Freiburg, Germany; Chair of Silviculture, Institute of Forest Sciences, University of Freiburg, Freiburg, Germany
Recommended Citation:
Wambsganss J.,Stutz K.P.,Lang F.. European beech deadwood can increase soil organic carbon sequestration in forest topsoils[J]. Forest Ecology and Management,2017-01-01,405