Winter plant phenology in the alpine meadow on the eastern Qinghai-Tibetan Plateau

doi:10.1093/aob/mcy112

CORC > 成都生物研究所 > 中国科学院成都生物研究所 > 生物多样性与生态系统服务领域 > 生态系统恢复与生物多样性保育四川省重点实验室

	Winter plant phenology in the alpine meadow on the eastern Qinghai-Tibetan Plateau
	Mo, Li 2,4; Luo, Peng 2; Mou, Chengxiang 2; Yang, Hao 2; Wang, Jun 2; Wang, Zhiyuan 1; Li, Yuejiao 3; Luo, Chuan 2; Li, Ting 2; Zuo, Dandan 2
刊名	ANNALS OF BOTANY
	2018
卷号	122 期号:6 页码:1033-1045
关键词	Above-ground biomass alpine meadow Qinghai-Tibetan Plateau winter green winter growth winter phenology
ISSN号	0305-7364
DOI	10.1093/aob/mcy112
产权排序	1
文献子类	Article
英文摘要	There is no knowledge of winter plant phenology and its controlling factors on the Qinghai-Tibetan Plateau (QTP). Thus, we conducted a 4 year winter phenology and growth dynamics study in the alpine meadow on the eastern QTP. From November 2013 to March 2017, the phenology of the 'winter-growth' and 'winter-green' species was recorded every 5 d. In November-February from 2014 to 2015, the above-ground biomass (AGB) in random plots was calculated to distinguish different growth patterns among winter growing species. The percentage of winter abundance relative to the summer population for forbs and the percentage of absolute coverage for grasses (W/S) were calculated to describe the importance of the winter population to the summer population. The soil moisture (SM) and soil temperature (ST) were used to explore the controlling factors on the AGB. Pearson's correlation analysis between winter phenology data and environmental variables, including air temperature (T-air), snow cover fraction (SCF), SM and ST, was used to investigate the factors affecting winter phenology during November-February from 2014 to 2017. There were 107 species in total in the sites, including ten 'winter-growth' species and four 'winter-green' species. Among the 'winter-green' species, Festuca ovina and Deschampsia cespitosa were the dominant species in the sites. The 'winter-growth' species grew new leaves or ramets or transitioned to reproductive growth. Gentiana spathulifolia even flowered in winter. 'Winter-growth' made important contributions to the annual AGB, e.g. winter growth of G. spathulifolia accounted for 23.26 % of its annual AGB, while 14.74 % of the annual AGB of G. crassuloides was from winter growth. In addition, winter warming and snowfall reduction under global climate change on the eastern QTP may decrease the AGB increment of the 'winter-growth' and delay the green-up onset date of 'winter-green' species. Also, winter warming and snowfall reduction may advance the first flowering date of 'winter-growth' species. In contrast to previous views that plants on the QTP were generally considered to remain dormant in winter, our study revealed that alpine meadow plants had strong winter growth which suggested the importance of re-evaluating the dynamics of ecosystem function of alpine meadow, including its contribution to the global carbon balance. It was also shown that soil moisture availability is more important than warmer temperature in controlling the green-up onset of 'winter-green' species on the eastern QTP, which contrasts with the traditional view that warmer winters could advance green-up. As snowmelt is the only source of soil water in winter, the prediction of the green-up trend may be further complicated by snowfall variation in winter.
学科主题	Plant Sciences
URL标识	查看原文
WOS关键词	GREEN-UP DATES ; SPRING PHENOLOGY ; FREEZING RESISTANCE ; CO2 EXCHANGE ; TEMPERATURE ; VEGETATION ; SNOW ; RESPONSES ; CLIMATE ; ECOSYSTEM
WOS研究方向	Plant Sciences
语种	英语
出版者	OXFORD UNIV PRESS
WOS记录号	WOS:000455680200010
内容类型	期刊论文
源URL	[http://210.75.237.14/handle/351003/30584]
专题	生物多样性与生态系统服务领域_生态系统恢复与生物多样性保育四川省重点实验室
作者单位	1.China West Normal Univ, Coll Environm Sci & Engn, 1 Shida Rd, Nanchong 637002, Peoples R China; 2.Chinese Acad Sci, Chengdu Inst Biol, Ecol Restorat & Biodivers Conservat Key Lab Sichu, 9 Sect 4 Renminnan Rd, Chengdu 610041, Peoples R China; 3.Yunnan Acad Agr Sci, Inst Agr Environm & Resources, 2238 Beijing Rd, Kunming, Yunnan, Peoples R China 4.Univ Chinese Acad Sci, 19 A Yuquan Rd, Beijing 100049, Peoples R China;
推荐引用方式 GB/T 7714	Mo, Li,Luo, Peng,Mou, Chengxiang,et al. Winter plant phenology in the alpine meadow on the eastern Qinghai-Tibetan Plateau[J]. ANNALS OF BOTANY,2018,122(6):1033-1045.
APA	Mo, Li.,Luo, Peng.,Mou, Chengxiang.,Yang, Hao.,Wang, Jun.,...&Zuo, Dandan.(2018).Winter plant phenology in the alpine meadow on the eastern Qinghai-Tibetan Plateau.ANNALS OF BOTANY,122(6),1033-1045.
MLA	Mo, Li,et al."Winter plant phenology in the alpine meadow on the eastern Qinghai-Tibetan Plateau".ANNALS OF BOTANY 122.6(2018):1033-1045.