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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
ISSN0012-9658
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
DOI10.1371/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
EISSN1939-9170
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
被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
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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