气候变化领域集成服务门户(CCPortal): Shifting biomass allocation determines community water use efficiency under climate warming

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DOI	10.1088/1748-9326/aba472
	Shifting biomass allocation determines community water use efficiency under climate warming
	Quan Q.; Zhang F.; Meng C.; Ma F.; Zhou Q.; Sun F.; Niu S.
发表日期	2020
ISSN	17489318
卷号	15 期号:9
英文摘要	Understanding how net primary production (NPP) and its allocation respond to climate warming is of fundamental importance in predicting ecosystem carbon (C) cycle and C-climate feedback. Especially, the optimal partitioning theory suggests that plants preferentially allocate photosynthates toward the above-or below-ground parts to acquire the limiting resources to maximize their growth rate and optimize resource use under environmental change. However, it remains elusive on how NPP allocation changes and regulates community water-use efficiency (WUEc) under climate warming. In this study, we conducted a manipulative warming experiment with three levels of warming treatments (control, + 1.5 °C and + 2.5 °C) to explore the response of NPP allocation and its regulation on WUEc in an alpine meadow. Results showed that above-ground NPP (ANPP) and below-ground NPP (BNPP) responded differently to warming. On average, W1.5 (+ 1.5 °C) and W2.5 (+ 2.5 °C) treatments increased BNPP by 28.98% and 33.28% and increased NPP by 20.05% and 38.70%, respectively, across 4 years. Whereas no consistent warming effect on ANPP was observed across years. The fraction of BNPP to total NPP (fBNPP) responded positively to warming under low ambient temperature and community biomass while it responded negatively under high ambient temperature and community biomass. Notably warming-induced changes in fBNPPnegatively correlated with warming-induced changes in WUEc. These results suggested that warming effect on NPP allocation was largely contextually dependent and implied important biological regulation on WUEc. The emerging trade-offs between NPP allocation and WUEc reflect adaptation strategy of plant community under climate change. © 2020 Institute of Physics Publishing. All rights reserved.
英文关键词	Allocation; Alpine meadow; Net primary production; Warming; Water-use efficiency
语种	英语
scopus关键词	Biomass; Ecology; Economic and social effects; Efficiency; Growth rate; Temperature; Adaptation strategies; Biomass allocation; Environmental change; Low ambient temperatures; Net primary production; Optimal partitioning; Warming treatments; Water use efficiency; Climate change; biomass; biomass allocation; climate change; environmental change; growth rate; net primary production; plant community; trade-off; water use efficiency
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/153792
作者单位	Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China; University of Chinese Academy of Sciences, Yuquanlu Beijing, 100049, China; Institute of Qinghai-Tibetan Plateau, Southwest Minzu University, Chengdu, 610041, China; Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China
推荐引用方式 GB/T 7714	Quan Q.,Zhang F.,Meng C.,et al. Shifting biomass allocation determines community water use efficiency under climate warming[J],2020,15(9).
APA	Quan Q..,Zhang F..,Meng C..,Ma F..,Zhou Q..,...&Niu S..(2020).Shifting biomass allocation determines community water use efficiency under climate warming.Environmental Research Letters,15(9).
MLA	Quan Q.,et al."Shifting biomass allocation determines community water use efficiency under climate warming".Environmental Research Letters 15.9(2020).