气候变化领域集成服务门户(CCPortal): Mapping and evaluating plant phenology in the Qinghai-Tibet Plateau: A digital approach using the plant Phenological Index (PI)

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DOI	10.1016/j.chnaes.2023.04.002
	Mapping and evaluating plant phenology in the Qinghai-Tibet Plateau: A digital approach using the plant Phenological Index (PI)
	Zhang, Yan Qing; Zhou, Xing Min; Zhou, Hua Kun
发表日期	2023
ISSN	1872-2032
起始页码	1112
结束页码	1119
卷号	43 期号:6
英文摘要	A new plant Phenological Index (PI) has been developed based on the visibility of plants, communities, and ecosystems. An evaluation and assessment of Zhang's Phenological Index (PI) were further examined based on the field observations of Alpine Shrub and Alpine Meadow vegetation at Haibei Alpine Ecosystem Research Station in the Northwest Qinghai-Tibetan Plateau.Zhang's PI is a measure of the plant's phenological status on the time intervals, calculating the accumulation of PI area in two dimensions. Two phenological variables were described as the Phenological Average Ratio (PAR) and the Lasted Days (LD). The LD may overlap when a certain percentage of the plant population has a nutritional stage that lasts longer than one additional phenological stage or occurs between two phenological stages. Correspondingly, the standard deviations of the observed multiple plant species represent plant population variations. After reviewing the PI applications for phenology studies on Alpine Shrub and Alpine Meadow vegetation, we found that they provide a means of measuring and comparing plant phenology at various levels population, community, and ecosystem. During the start and end of the season in the Alpine Plateau region, plant phenological changes were significantly constrained by the environmental factors. However, during the summer season, Sunlight Hours (X4), Accumulated Ground Temperature (X3) and Accumulated Air Temperate (X1) above 0 degrees C haZhang's PI can be used for climate change research by altering warming temperatures, water conditions, and nutrient levels. We also discussed the concern of applying Zhang's PI to global warming research. Moreover, the Seasonal Phenological Index (SPI) can be described on a regional scale and used with ASOS, AEOS, SPAR, and SLD characters to evaluate the changes in the timing of seasonal events in Eqs. (3)(4)(5).
关键词	Phenological Index (PI)Seasonal Phenological Index (SPI)Environmental factors Quantitative analysis Phenology Climate change
英文关键词	VEGETATION PHENOLOGY; RESPONSES
WOS研究方向	Ecology
WOS记录号	WOS:001106260500001
来源期刊	ACTA ECOLOGICA SINICA
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283504
作者单位	Simon Fraser University
推荐引用方式 GB/T 7714	Zhang, Yan Qing,Zhou, Xing Min,Zhou, Hua Kun. Mapping and evaluating plant phenology in the Qinghai-Tibet Plateau: A digital approach using the plant Phenological Index (PI)[J],2023,43(6).
APA	Zhang, Yan Qing,Zhou, Xing Min,&Zhou, Hua Kun.(2023).Mapping and evaluating plant phenology in the Qinghai-Tibet Plateau: A digital approach using the plant Phenological Index (PI).ACTA ECOLOGICA SINICA,43(6).
MLA	Zhang, Yan Qing,et al."Mapping and evaluating plant phenology in the Qinghai-Tibet Plateau: A digital approach using the plant Phenological Index (PI)".ACTA ECOLOGICA SINICA 43.6(2023).