气候变化领域集成服务门户(CCPortal): Diverse and divergent influences of phenology on herbaceous aboveground biomass across the Tibetan Plateau alpine grasslands

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DOI	10.1016/j.ecolind.2020.107036
	Diverse and divergent influences of phenology on herbaceous aboveground biomass across the Tibetan Plateau alpine grasslands
	Li P.; Zhu W.; Xie Z.
发表日期	2021
ISSN	1470160X
卷号	121
英文摘要	Indirect influences of phenology on productivity (e.g., phenology-functional traits-productivity) could exist due to close associations between phenology and plant functional traits, which may further result in the divergent responses of vegetation biomass to phenology among plant functional groups (PFGs). Here, we introduced functional traits (i.e., plant height and growth rate) to analyse the influences of phenology on aboveground biomass (AGB) of two symbiotic PFGs based on 19-year in-situ observational data for plant phenology at 7 sites across the Tibetan Plateau alpine grasslands. The vegetative growth phase (VGP) and reproductive growth phase (RGP) were calculated according to the observed green-up date, first flowering date and first fruit-ripening date. The commonality analysis and structural equation modelling were applied to explore the paths and degrees of phenological influence on AGB. The results showed that the phenological influences on herbaceous AGB included both direct (“phenology-AGB”) and indirect paths (“phenology-functional traits-AGB”) and differed between two PFGs. Phenological metrics, especially VGP, were the key factors driving the adjustment (path coefficients \|w\| = 0.19 – 0.67), although maximum plant height (Hmax) contributed to the most to the AGB (\|w\| = 0.78). Specifically, the grasses had two indirect phenological influence paths on AGB, while the sedges had multiple direct and indirect influence paths. Comparing the differences in phenology and functional traits between two PFGs, our study implied that grasses may tend to preferentially adjust vegetative (stem) growth via phenology, while sedges may tend to preferentially adjust root and reproductive growth via phenology, which could be relevant to the differences in the synthesis, accumulation, allocation, and decomposition of organic matter in diverse organs and the growth and reproduction strategies, competition and symbiosis of different PFGs. © 2020 Elsevier Ltd
英文关键词	Biomass; Grass; Influence mechanism; Phenology; Sedge; Tibetan Plateau
语种	英语
scopus关键词	Ecological Indicators
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158297
作者单位	State Key Laboratory of Earth Surface Processes and Resource Ecology; Beijing Normal University; Beijing; 100875; China; Beijing Engineering Research Center for Global Land Remote Sensing Products; Institute of Remote Sensing Science and Engineering; Faculty of Geographical Science; Beijing Normal University; Beijing; 100875; China
推荐引用方式 GB/T 7714	Li P.,Zhu W.,Xie Z.. Diverse and divergent influences of phenology on herbaceous aboveground biomass across the Tibetan Plateau alpine grasslands[J],2021,121.
APA	Li P.,Zhu W.,&Xie Z..(2021).Diverse and divergent influences of phenology on herbaceous aboveground biomass across the Tibetan Plateau alpine grasslands.,121.
MLA	Li P.,et al."Diverse and divergent influences of phenology on herbaceous aboveground biomass across the Tibetan Plateau alpine grasslands".121(2021).