DOI: 10.1016/j.foreco.2014.03.039
Scopus记录号: 2-s2.0-84899784518
论文题名: Fine root longevity and carbon input into soil from below- and aboveground litter in climatically contrasting forests
作者: Leppälammi-Kujansuu J. ; Aro L. ; Salemaa M. ; Hansson K. ; Kleja D.B. ; Helmisaari H.-S.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2014
卷: 326 起始页码: 79
结束页码: 90
语种: 英语
英文关键词: Carbon flow
; Fine root biomass and turnover
; Litter production
; Minirhizotrons
; Picea abies
; Understorey
Scopus关键词: Biomass
; Carbon
; Digital storage
; Ecology
; Plants (botany)
; Soils
; Carbon flow
; Fine-root biomass
; Minirhizotrons
; Picea abies
; Understorey
; Forestry
; Biomass
; Ecology
; Forest Litter
; Forestry
; Picea Abies
; Plants
; Production
英文摘要: The major part of carbon (C) flow into forest soil consists of continually renewed fine roots and aboveground litterfall. We studied the belowground C input from the fine root litter of trees and understorey vegetation in relation to their aboveground litterfall in two Norway spruce (. Picea abies L.) stands located in northern and southern Finland. The production of fine roots was estimated by using turnover and biomass data from minirhizotrons and soil cores. The foliage litter production of trees was estimated from litter traps, and that of the understorey vegetation from its annual growth and coverage. Finally, we augmented the data with four spruce plots in Sweden in order to study the above- and belowground litter ratios along latitudinal and soil fertility gradients.The fine root biomass of spruce trees per stand basal area was almost double in the northern site compared to the southern site. Furthermore, spruce fine roots in the north persisted significantly longer (97. ±. 2. weeks) than spruce roots in the south (89. ±. 2. weeks) or understorey fine roots at both sites. The annual production of tree foliage litter was higher in the southern stand, but the total amount of litter (including trees and understorey, above- and belowground) was similar at both sites, as was the ratio between the above- and belowground litter production.The role of understorey vegetation was greater in the northern site where it was responsible for 23% and 33% of below- and aboveground litter production, respectively, compared to 11% and 15% in the south. Thus, both below- and aboveground understorey C input is substantial and should be taken into account in ecosystem C cycle models.The regression between the aboveground:belowground litter production-ratio and the C:N-ratio of the organic layer (combined data from Finland and Sweden), showed that the share of belowground litter production increased when site fertility decreased. This shift in the litter production pattern from above- to belowground in the least fertile sites may have an impact on litter C quality and soil C storage. © 2014 The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65903
Appears in Collections: 影响、适应和脆弱性
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作者单位: University of Helsinki, Department of Forest Sciences, P.O. Box 27, FI-00014 Helsinki, Finland; Finnish Forest Research Institute, Kaironiementie 15, FI-39700 Parkano, Finland; Finnish Forest Research Institute, P.O. Box 18, FI-01301 Vantaa, Finland; Unité Biogéochimie des Ecosystèmes Forestiers (UR 1138), Centre INRA de Nancy, 54280 Champenoux, France; Swedish University of Agricultural Sciences, Department of Soil and Environment, P.O. Box 7001, SE-75007 Uppsala, Sweden
Recommended Citation:
Leppälammi-Kujansuu J.,Aro L.,Salemaa M.,et al. Fine root longevity and carbon input into soil from below- and aboveground litter in climatically contrasting forests[J]. Forest Ecology and Management,2014-01-01,326