DOI: 10.1016/j.foreco.2013.12.016
Scopus记录号: 2-s2.0-84892863535
论文题名: Mineralization and fragmentation rates of bark attached to logs in a northern boreal forest
作者: Shorohova E. ; Kapitsa E.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2014
卷: 315 起始页码: 185
结束页码: 190
语种: 英语
英文关键词: Abies sibirica
; Betula sp.
; Coarse woody debris
; Decomposition
; Picea obovata
; Pinus sibirica
Scopus关键词: Abies sibirica
; Betula sp
; Coarse woody debris
; Picea obovata
; Pinus sibirica
; Biodiversity
; Carbon
; Decomposition
; Estimation
; Forestry
; Wood
; Mineralogy
; bark
; biodiversity
; biogeochemistry
; boreal forest
; coarse woody debris
; coniferous forest
; deciduous forest
; decomposition
; fragmentation
; logging (timber)
; mineralization
; nutrient cycling
; Abies Sibirica
; Biodiversity
; Carbon
; Decay
; Forestry
; Picea Obovata
; Pinus Cembra Sibirica
; Wood
; Komi
; Russian Federation
英文摘要: Predicting the characteristics of coarse woody debris (CWD) and its importance for biodiversity, carbon and nutrient cycling requires narrowing the uncertainties in bark decomposition rate assessments. We estimated bark decomposition rates and compared them to wood decomposition rates of birches (Betula pubescens and Betula pendula), Siberian fir (Abies sibirica), Siberian pine (Pinus sibirica) and Siberian spruce (Picea obovata) in the northern boreal forest of the Komi Republic, Russia. Estimates were made based on the mass loss of bark attached to above-ground fallen and leaning logs dated to have fallen from 1 to 168years previous to sampling. A single-exponential model was used to estimate the mass loss of bark attached to the logs. Decomposition rate estimates of all log bark included mass loss due to fragmentation. Mineralization rate as mass loss per surface area was estimated for non-fragmented bark pieces. The initial bark mass of the tree base was higher compared to that of the rest of the log; it did not depend neither on the tree species nor on the log size. The proportional rate of bark mineralization was the same for Siberian fir, Siberian pine and Siberian spruce logs - 0.040yr-1. The mineralization rate of birch bark was 0.009yr-1. Bark fragmentation accelerated mass loss. Variation in bark decomposition rates was explained by tree species and log diameter and did not depend on tree mortality mode. The bark turn-over time (t95) was 302, 224, 149, 140 and 117years for birch, fir, spruce, Siberian pine with diameter more than 41cm, and Siberian pine with diameter less than 40cm, respectively. Bark decomposed faster than wood for fir (0.034 vs. 0.026yr-1), spruce (0.051 vs. 0.030yr-1) and Siberian pine with diameters less than 40cm (0.054 vs. 0.008yr-1) and (0.065 vs. 0.008yr-1) for logs with diameters more than 41cm. Birch bark decomposed slower than birch wood (0.025 vs. 0.032yr-1). The different decomposition rates of wood and bark suggest that considering wood and bark together as one substrate can result in a less accurate portrayal of decomposition patterns. These bark decomposition rates can be used for modelling carbon dynamics in similar ecosystems. Knowing the turnover time of log bark for these tree species also facilitates the prediction of the quality of CWD in biodiversity studies in boreal forests. © 2013 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66116
Appears in Collections: 影响、适应和脆弱性
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作者单位: Finnish Forest Research Institute, Vantaa Research Unit, P.O. Box 18, FIN-01301 Vantaa, Finland; Saint-Petersburg State Forest Technical University, 194021 Institutsky str. 5, Saint-Petersburg, Russian Federation
Recommended Citation:
Shorohova E.,Kapitsa E.. Mineralization and fragmentation rates of bark attached to logs in a northern boreal forest[J]. Forest Ecology and Management,2014-01-01,315