Climate-driven global changes in carbon use efficiency
Zhang, YJ; Yu, GR; Yang, J; Wimberly, MC; Zhang, XZ; Tao, J; Jiang, YB; Zhu, JT
2014
Source PublicationGLOBAL ECOLOGY AND BIOGEOGRAPHY
ISSN1466-822X
Volume23Issue:2Pages:144-155
AbstractAimCarbon use efficiency [net primary production (NPP)/gross primary production (GPP) ratio] is a parameter related to the allocation of photosynthesized products by plants and is commonly used in many biogeochemical cycling models. But how this parameter changes with climates is still unknown. Faced by an aggravated global warming, there is a heightened necessity in unravelling the dependence of the NPP/GPP ratio on climates. The objective of this study was to examine how ongoing climate change is regulating global patterns of change in the NPP/GPP ratio. The study finding would elucidate whether the global vegetation ecosystem is becoming more or less efficient in terms of carbon storage under climatic fluctuation. LocationThe global planetary ecosystem. MethodsThe annual NPP/GPP ratio of the global terrestrial ecosystem was calculated over a 10-year period based on Moderate Resolution Imaging Spectroradiometer data and an ecosystem productivity model. The temporal dynamics of the global NPP/GPP ratio and their dependence on climate were investigated. ResultsThe global NPP/GPP ratio exhibited a decreasing trend from 2000 to 2009 due to decreasing NPP and stable GPP over this period. The temporal dynamics of the NPP/GPP ratio were strongly controlled by temperature and precipitation. Increased temperature lowered the NPP/GPP ratio, and increased precipitation led to a higher NPP/GPP ratio. ConclusionsThe NPP/GPP ratio exhibits a clear temporal pattern associated with climatic fluctuations at a global scale. The associations of the NPP/GPP ratio with climatic variability challenge the conventional assumption that the NPP/GPP ratio should be consistent independent of environmental conditions. More importantly, the findings of this study have fundamental significance for our understanding of ongoing global climatic change. In regions and time periods experiencing drought or increased temperatures, plant ecosystems would suffer a higher ecosystem respiration cost and their net productivity would shrink.
SubtypeJournal
KeywordClimate GPP global scale NPP GPP ratio NPP temporal dynamics
Subject AreaEnvironmental Sciences & Ecology ; Physical Geography
WOS Subject ExtendedEcology ; Geography, Physical
WOS KeywordNET PRIMARY PRODUCTION ; GROSS PRIMARY PRODUCTION ; RELATIVE GROWTH-RATE ; DROUGHT-INDUCED REDUCTION ; NPP-GPP RATIO ; PLANT RESPIRATION ; MAINTENANCE RESPIRATION ; AUTOTROPHIC RESPIRATION ; PRIMARY PRODUCTIVITY ; ECOSYSTEM RESPONSES
Indexed BySCI
Language英语
WOS IDWOS:000329139600002
PublisherWILEY-BLACKWELL
Citation statistics
Cited Times:42[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/44587
Collection生态系统网络观测与模拟院重点实验室_生态网络实验室
Recommended Citation
GB/T 7714
Zhang, YJ,Yu, GR,Yang, J,et al. Climate-driven global changes in carbon use efficiency[J]. GLOBAL ECOLOGY AND BIOGEOGRAPHY,2014,23(2):144-155.
APA Zhang, YJ.,Yu, GR.,Yang, J.,Wimberly, MC.,Zhang, XZ.,...&Zhu, JT.(2014).Climate-driven global changes in carbon use efficiency.GLOBAL ECOLOGY AND BIOGEOGRAPHY,23(2),144-155.
MLA Zhang, YJ,et al."Climate-driven global changes in carbon use efficiency".GLOBAL ECOLOGY AND BIOGEOGRAPHY 23.2(2014):144-155.
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