Divergent apparent temperature sensitivity of terrestrial ecosystem respiration
Song, B; Niu, SL; Luo, RS; Luo, YQ; Chen, JQ; Yu, GR; Olejnik, J; Wohlfahrt, G; Kiely, G; Noormets, A; Montagnani, L; Cescatti, A; Magliulo, V; Law, BE; Lund, M; Varlagin, A; Raschi, A; Peichl, M; Nilsson, MB; Merbold, L
2014
Source PublicationJOURNAL OF PLANT ECOLOGY
ISSN1752-9921
Volume7Issue:5Pages:419-428
AbstractAims Recent studies revealed convergent temperature sensitivity of ecosystem respiration (Re) within aquatic ecosystems and between terrestrial and aquatic ecosystems. We do not know yet whether various terrestrial ecosystems have consistent or divergent temperature sensitivity. Here, we synthesized 163 eddy covariance flux sites across the world and examined the global variation of the apparent activation energy (Ea), which characterizes the apparent temperature sensitivity of and its interannual variability (IAV) as well as their controlling factors. Methods We used carbon fluxes and meteorological data across FLUXNET sites to calculate mean annual temperature, temperature range, precipitation, global radiation, potential radiation, gross primary productivity and Re by averaging the daily values over the years in each site. Furthermore, we analyzed the sites with >8 years data to examine the IAV of Ea and calculated the standard deviation of Ea across years at each site to characterize IAV. Important Findings The results showed a widely global variation of Ea, with significantly lower values in the tropical and subtropical areas than in temperate and boreal areas, and significantly higher values in grasslands and wetlands than that in deciduous broadleaf forests and evergreen forests. Globally, spatial variations of Ea were explained by changes in temperature and an index of water availability with differing contribution of each explaining variable among climate zones and biomes. IAV and the corresponding coefficient of variation of Ea decreased with increasing latitude, but increased with radiation and corresponding mean annual temperature. The revealed patterns in the spatial and temporal variations of Ea and its controlling factors indicate divergent temperature sensitivity of R-e, which could help to improve our predictive understanding of R-e in response to climate change.
SubtypeJournal
Keywordactivation energy ecosystem respiration index of water availability interannual variability gross primary productivity
Subject AreaPlant Sciences ; Environmental Sciences & Ecology
WOS Subject ExtendedPlant Sciences ; Ecology
WOS KeywordEDDY COVARIANCE TECHNIQUE ; FOREST SOIL RESPIRATION ; CARBON-CYCLE FEEDBACK ; GLOBAL CONVERGENCE ; DEPENDENT Q(10) ; WATER-VAPOR ; DIOXIDE ; CLIMATE ; MODEL ; EXCHANGE
Indexed BySCI
Language英语
WOS IDWOS:000343327200001
PublisherOXFORD UNIV PRESS
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Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/44504
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
Song, B,Niu, SL,Luo, RS,et al. Divergent apparent temperature sensitivity of terrestrial ecosystem respiration[J]. JOURNAL OF PLANT ECOLOGY,2014,7(5):419-428.
APA Song, B.,Niu, SL.,Luo, RS.,Luo, YQ.,Chen, JQ.,...&Merbold, L.(2014).Divergent apparent temperature sensitivity of terrestrial ecosystem respiration.JOURNAL OF PLANT ECOLOGY,7(5),419-428.
MLA Song, B,et al."Divergent apparent temperature sensitivity of terrestrial ecosystem respiration".JOURNAL OF PLANT ECOLOGY 7.5(2014):419-428.
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