Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.14594 |
Carbon flux from decomposing wood and its dependency on temperature, wood N-2 fixation rate, moisture and fungal composition in a Norway spruce forest | |
Rinne-Garmston, Katja T.; Peltoniemi, Krista; Chen, Janet; Peltoniemi, Mikko; Fritze, Hannu; Makipaa, Raisa | |
2019-05-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY
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ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2019 |
卷号 | 25期号:5页码:1852-1867 |
文章类型 | Article |
语种 | 英语 |
国家 | Finland |
英文摘要 | Globally 40-70 Pg of carbon (C) are stored in coarse woody debris on the forest floor. Climate change may reduce the function of this stock as a C sink in the future due to increasing temperature. However, current knowledge on the drivers of wood decomposition is inadequate for detailed predictions. To define the factors that control wood respiration rate of Norway spruce and to produce a model that adequately describes the decomposition process of this species as a function of time, we used an unprecedentedly diverse analytical approach, which included measurements of respiration, fungal community sequencing, N-2 fixation rate, nifH copy number, C-14-dating as well as N%, delta C-13 and C% values of wood. Our results suggest that climate change will accelerate C flux from deadwood in boreal conditions, due to the observed strong temperature dependency of deadwood respiration. At the research site, the annual C flux from deadwood would increase by 27% from the current 117 g C/kg wood with the projected climate warming (RCP4.5). The second most important control on respiration rate was the stage of wood decomposition; at early stages of decomposition low nitrogen content and low wood moisture limited fungal activity while reduced wood resource quality decreased the respiration rate at the final stages of decomposition. Wood decomposition process was best described by a Sigmoidal model, where after 116 years of wood decomposition mass loss of 95% was reached. Our results on deadwood decomposition are important for C budget calculations in ecosystem and climate change models. We observed for the first time that the temperature dependency of N-2 fixation, which has a major role at providing N for wood-inhabiting fungi, was not constant but varied between wood density classes due to source supply and wood quality. This has significant consequences on projecting N-2 fixation rates for deadwood in changing climate. |
英文关键词 | activation energy boreal forest carbon flux coarse woody debris N-2 fixation nifH respiration rate wood-inhabiting fungi |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000465103600022 |
WOS关键词 | NITROGEN-FIXATION ; DINITROGEN FIXATION ; DEBRIS ; DECAY ; RESPIRATION ; DYNAMICS ; LITTER ; DIVERSITY ; LOGS ; COMMUNITIES |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
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/182930 |
专题 | 气候变化 资源环境科学 |
作者单位 | Nat Resources Inst Finland Luke, Helsinki, Finland |
推荐引用方式 GB/T 7714 | Rinne-Garmston, Katja T.,Peltoniemi, Krista,Chen, Janet,et al. Carbon flux from decomposing wood and its dependency on temperature, wood N-2 fixation rate, moisture and fungal composition in a Norway spruce forest[J]. GLOBAL CHANGE BIOLOGY,2019,25(5):1852-1867. |
APA | Rinne-Garmston, Katja T.,Peltoniemi, Krista,Chen, Janet,Peltoniemi, Mikko,Fritze, Hannu,&Makipaa, Raisa.(2019).Carbon flux from decomposing wood and its dependency on temperature, wood N-2 fixation rate, moisture and fungal composition in a Norway spruce forest.GLOBAL CHANGE BIOLOGY,25(5),1852-1867. |
MLA | Rinne-Garmston, Katja T.,et al."Carbon flux from decomposing wood and its dependency on temperature, wood N-2 fixation rate, moisture and fungal composition in a Norway spruce forest".GLOBAL CHANGE BIOLOGY 25.5(2019):1852-1867. |
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