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DOI	10.1111/gcb.15132
	Modeling leaf senescence of deciduous tree species in Europe
	Liu Qiang; Piao Shilong; Campioli, Matteo; Gao Mengdi; Fu, Yongshuo H.; Wang Kai; He Yue; Li Xiangyi; Janssens, Ivan A.
通讯作者	Piao, SL (通讯作者)
发表日期	2020
ISSN	1354-1013
EISSN	1365-2486
起始页码	4104
结束页码	4118
卷号	26 期号:7
英文摘要	Autumnal leaf senescence signals the end of photosynthetic activities in temperate deciduous trees and consequently exerts a strong control on various ecological processes. Predicting leaf senescence dates (LSD) with high accuracy is thus a prerequisite for better understanding the climate-ecosystem interactions. However, modeling LSD at large spatial and temporal scales is challenging. In this study, first, we used 19972 site-year records (848 sites and four deciduous tree species) from the PAN European Phenology network to calibrate and evaluate six leaf senescence models during the period 1980-2013. Second, we extended the spatial analysis by repeating the procedure across Europe using satellite-derived end of growing season and a forest map. Overall, we found that models that considered photoperiod and temperature interactions outperformed models using simple temperature or photoperiod thresholds for Betula pendula, Fagus sylvatica and Quercus robur. On the contrary, no model displayed reasonable predictions for Aesculus hippocastanum. This inter-model comparison indicates that, contrary to expectation, photoperiod does not significantly modulate the accumulation of cooling degree days (CDD). On the other hand, considering the carryover effect of leaf unfolding date could promote the models' predictability. The CDD models generally matched the observed LSD at species level and its interannual variation, but were limited in explaining the inter-site variations, indicating that other environmental cues need to be considered in future model development. The discrepancies remaining between model simulations and observations highlight the need of manipulation studies to elucidate the mechanisms behind the leaf senescence process and to make current models more realistic.
关键词	CLIMATE-CHANGE GROWING-SEASON NORTHERN-HEMISPHERE AUTUMN SENESCENCE CARBON UPTAKE PHENOLOGY TEMPERATURE RESPONSES PRECIPITATION PHOTOPERIOD
英文关键词	carryover effect of leaf unfolding; climate change; cooling degree days; leaf senescence model; model evaluation; photoperiod
语种	英语
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
WOS类目	Biodiversity Conservation ; Ecology ; Environmental Sciences
WOS记录号	WOS:000532990600001
来源期刊	GLOBAL CHANGE BIOLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259923
推荐引用方式 GB/T 7714	Liu Qiang,Piao Shilong,Campioli, Matteo,et al. Modeling leaf senescence of deciduous tree species in Europe[J]. 中国科学院青藏高原研究所,2020,26(7).
APA	Liu Qiang.,Piao Shilong.,Campioli, Matteo.,Gao Mengdi.,Fu, Yongshuo H..,...&Janssens, Ivan A..(2020).Modeling leaf senescence of deciduous tree species in Europe.GLOBAL CHANGE BIOLOGY,26(7).
MLA	Liu Qiang,et al."Modeling leaf senescence of deciduous tree species in Europe".GLOBAL CHANGE BIOLOGY 26.7(2020).