Knowledge Management System Of Institute Of Botany,CAS
Warming effects on permafrost ecosystem carbon fluxes associated with plant nutrients | |
Li, Fei1; Peng, Yunfeng; Natali, Susan M.; Chen, Kelong3; Han, Tianfeng; Yang, Guibiao1; Ding, Jinzhi1; Zhang, Dianye1; Wang, Guanqin1; wang, Jun1; Yu, Jianchun1; Liu, Futing1; Yang, Yuanhe1 | |
2017 | |
发表期刊 | ECOLOGY |
ISSN | 0012-9658 |
卷号 | 98期号:11页码:2851-2859 |
摘要 | Large uncertainties exist in carbon (C)-climate feedback in permafrost regions, partly due to an insufficient understanding of warming effects on nutrient availabilities and their subsequent impacts on vegetation C sequestration. Although a warming climate may promote a substantial release of soil C to the atmosphere, a warming-induced increase in soil nutrient availability may enhance plant productivity, thus offsetting C loss from microbial respiration. Here, we present evidence that the positive temperature effect on carbon dioxide (CO2) fluxes may be weakened by reduced plant nitrogen (N) and phosphorous (P) concentrations in a Tibetan permafrost ecosystem. Although experimental warming initially enhanced ecosystem CO2 uptake, the increased rate disappeared after the period of peak plant growth during the early growing season, even though soil moisture was not a limiting factor in this swamp meadow ecosystem. We observed that warming did not significantly affect soil extractable N or P during the period of peak growth, but decreased both N and P concentrations in the leaves of dominant plant species, likely caused by accelerated plant senescence in the warmed plots. The attenuated warming effect on CO2 assimilation during the late growing season was associated with lowered leaf N and P concentrations. These findings suggest that warming-mediated nutrient changes may not always benefit ecosystem C uptake in permafrost regions, making our ability to predict the C balance in these warming-sensitive ecosystems more challenging than previously thought. |
关键词 | alpine ecosystems carbon-climate feedback climate warming nutrient limitation permafrost carbon cycle Tibetan Plateau |
学科领域 | Science & Technology - Other Topics |
DOI | 10.1371/journal.pone.0166603 |
收录类别 | SCI |
语种 | 英语 |
WOS关键词 | MICROBIAL BIOMASS CALIBRATION ; FUMIGATION-EXTRACTION METHOD ; TIBETAN PLATEAU ; CLIMATE-CHANGE ; ALPINE MEADOW ; SOIL ; NITROGEN ; AVAILABILITY ; COMMUNITIES ; INCREASES |
WOS记录号 | WOS:000391641500010 |
出版者 | WILEY |
文献子类 | Article |
出版地 | HOBOKEN |
EISSN | 1939-9170 |
资助机构 | National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31670482, 31770521, 41371213] ; Key Research Program of Frontier Sciences, Chinese Academy of Sciences [QYZDB-SSW-SMC049] ; Chinese Academy of Sciences-Peking University Pioneer Cooperation Team ; Thousand Young Talents ProgramChinese Academy of Sciences |
作者邮箱 | yhyang@ibcas.ac.cn |
作品OA属性 | Green Published, Green Submitted, gold |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ibcas.ac.cn/handle/2S10CLM1/22109 |
专题 | 植被与环境变化国家重点实验室 |
作者单位 | 1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Natali, Susan M.] Woods Hole Res Ctr, 149 Woods Hole Rd, Falmouth, MA 02540 USA 4.Qinghai Normal Univ, Coll Life & Geog Sci, Xining 810008, Peoples R China |
推荐引用方式 GB/T 7714 | Li, Fei,Peng, Yunfeng,Natali, Susan M.,et al. Warming effects on permafrost ecosystem carbon fluxes associated with plant nutrients[J]. ECOLOGY,2017,98(11):2851-2859. |
APA | Li, Fei.,Peng, Yunfeng.,Natali, Susan M..,Chen, Kelong.,Han, Tianfeng.,...&Yang, Yuanhe.(2017).Warming effects on permafrost ecosystem carbon fluxes associated with plant nutrients.ECOLOGY,98(11),2851-2859. |
MLA | Li, Fei,et al."Warming effects on permafrost ecosystem carbon fluxes associated with plant nutrients".ECOLOGY 98.11(2017):2851-2859. |
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