Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.foreco.2017.05.023 |
Ecosystems carbon budgets of differently aged downy birch stands growing on well-drained peatlands | |
Uri, Veiko1; Kukumagi, Mai2; Aosaar, Jurgen1; Varik, Mats1; Becker, Hardo1; Morozov, Gunnar1; Karoles, Kalle1 | |
2017-09-01 | |
发表期刊 | FOREST ECOLOGY AND MANAGEMENT
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ISSN | 0378-1127 |
EISSN | 1872-7042 |
出版年 | 2017 |
卷号 | 399 |
文章类型 | Article |
语种 | 英语 |
国家 | Estonia |
英文摘要 | Estimation of the carbon (C) storages and fluxes in different forest ecosystems is essential for understanding their C sequestration ability. The net ecosystem production (NEP) and the net primary production (NPP) in five downy birch (Betula pubescens) stands, aged between 12 and 78 years, growing on fertile well-drained Histosols, were studied. Drainage of swamp forests is a large-scale manipulation, which causes significant shifts at the ecosystems level, altering C and nutrient cycling a great deal. Young and middle-aged downy birch stands (12-30-year-old) acted as C sink ecosystems, accumulating 1.4-3.0 t C ha(-1) yr(-1). In the 38-year-old stand NEP was roughly zero; annual C budget was almost in balance. The over-matured downy birch stand (78-year-old) acted as a C source emitting 0.95 t C ha(-1) yr(-1). Annual woody biomass increment of the stand was the main factor which affected the forest to act as a C accumulating system. Although the highest heterotrophic respiration (Rh) values were measured in the middle-aged stands, mean soil C emission did not differ significantly between the studied stands. Annual total soil respiration (Rs) and Rh ranged from 7.4 to 8.8 t C ha(-1) and 4.7 to 6.2 t C ha(-1), respectively. Soil temperature appeared to be the dominant driver of the soil CO2 effluxes. Temperature sensitivity (Q(10) value) of respiration rates (3.0-5.5), as well as the Rh/Rs (0.6-0.7) varied irrespective of stand age. Both the annual aboveground litter (1.5-1.9 t C ha(-1) yr(-1)) and fine root litter (0.9-1.5 t C ha(-1) yr(-1)) input fluxes were quite similar for the studied stands. However, the annual organic C input into the soil via above- and belowground litter was smaller than the annual Rh efflux, indicating that continuous mineralization of the peat layer reduces the soil organic C pool. The main share of the C stock in the drained swamp downy birch stands was soil C; the storage of C accumulated in the woody biomass of the trees accounted for only 5-20% of the total C storage of the ecosystem. (C) 2017 Elsevier B.V. All rights reserved. |
英文关键词 | Betula pubescens Drained peatland Net ecosystem production Soil respiration Carbon fluxes Aboveground and fine root litter |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000404195800009 |
WOS关键词 | FINE-ROOT BIOMASS ; BETULA-PENDULA ROTH ; L. MOENCH PLANTATION ; SOIL RESPIRATION ; NORWAY SPRUCE ; ALNUS-INCANA ; SILVER BIRCH ; NUTRIENT ACCUMULATION ; NITROGEN ACCUMULATION ; ORGANIC-MATTER |
WOS类目 | Forestry |
WOS研究方向 | Forestry |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/22504 |
专题 | 气候变化 |
作者单位 | 1.Estonian Univ Life Sci, Inst Forestry & Rural Engn, Kreutzwaldi 5, EE-51014 Tartu, Estonia; 2.Univ Tartu, Inst Ecol & Earth Sci, Vanemuise 46, EE-51014 Tartu, Estonia |
推荐引用方式 GB/T 7714 | Uri, Veiko,Kukumagi, Mai,Aosaar, Jurgen,et al. Ecosystems carbon budgets of differently aged downy birch stands growing on well-drained peatlands[J]. FOREST ECOLOGY AND MANAGEMENT,2017,399. |
APA | Uri, Veiko.,Kukumagi, Mai.,Aosaar, Jurgen.,Varik, Mats.,Becker, Hardo.,...&Karoles, Kalle.(2017).Ecosystems carbon budgets of differently aged downy birch stands growing on well-drained peatlands.FOREST ECOLOGY AND MANAGEMENT,399. |
MLA | Uri, Veiko,et al."Ecosystems carbon budgets of differently aged downy birch stands growing on well-drained peatlands".FOREST ECOLOGY AND MANAGEMENT 399(2017). |
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