Recruitment of the high elevation cushion plant Arenaria polytrichoides is limited by competition, thus threatened by currently established vegetation

doi:10.1111/jse.12481

	Recruitment of the high elevation cushion plant Arenaria polytrichoides is limited by competition, thus threatened by currently established vegetation
	Chen, Jian-Guo 1; Yang, Yang1 ; Wang, Song-Wei 2; Stocklin, Jurg 3; Peng, De-Li4 ; Sun, Hang1
通讯作者	Sun, Hang(sunhang@mail.kib.ac.cn)
	2020
发表期刊	JOURNAL OF SYSTEMATICS AND EVOLUTION
ISSN	1674-4918
卷号	58 期号:1 页码:59-68
摘要	Cushion plants have been confirmed to be keystone species of alpine ecosystems. However, the adaptive strategies responsible for their recruitment and persistence remain largely unclear. Also, the effect of competition by species already established in surrounding vegetation is not known. We first assessed population size and the frequency distribution of individuals of different size in communities of the keystone cushion Arenaria polytrichoides Edgew. along an elevational gradient in southwestern China. Furthermore, in controlled experiments the effects of soil quality, light availability, and competition by other species on seedling recruitment and survival was tested. At lower elevation individuals were larger (elder), but population size (density) was lower compared to higher elevation; similarly, adults and old individuals were relatively more frequent at low elevation, whereas juvenile and small individuals were more frequent at higher elevations. Seedling recruitment differed depending on soil origin with seeds sown in soils from low elevation having a higher germination percentage and seedling survival when grown without competition. Competition by other species delayed germination but did not influence the final germination percentage, but it increased seedling mortality and reduced their survival. Full light accelerated the germination process, but did not affect final germination percentage and seedling mortality. Results suggest that the recruitment and persistence of A. polytrichoides is strongly affected by competition, whereas temperature and soil quality are less important. We speculate that when populations of cushion A. polytrichoides are likely to be exposed to higher competition due to environmental changes, this species is in danger of being weeded out.
关键词	Arenaria polytrichoides cushion species germination percentage population persistence seedling recruitment seedling survival
DOI	10.1111/jse.12481
收录类别	SCI ; SCI
语种	英语
WOS记录号	WOS:000505634100005
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/70560
专题	中国科学院东亚植物多样性与生物地理学重点实验室
通讯作者	Sun, Hang
作者单位	1.Chinese Acad Sci, Kunming Inst Bot, Key Lab Plant Div & Biogeog East Asia, Kunming 650201, Yunnan, Peoples R China 2.Yunnan Univ, Sch Iife Sci, Kunming 650091, Yunnan, Peoples R China 3.Univ Basel, Bot Inst, CH-4056 Basel, Switzerland 4.Yunnan Normal Univ, Sch life Sci, Kunming 650092, Yunnan, Peoples R China
推荐引用方式 GB/T 7714	Chen, Jian-Guo,Yang, Yang,Wang, Song-Wei,et al. Recruitment of the high elevation cushion plant Arenaria polytrichoides is limited by competition, thus threatened by currently established vegetation[J]. JOURNAL OF SYSTEMATICS AND EVOLUTION,2020,58(1):59-68.
APA	Chen, Jian-Guo,Yang, Yang,Wang, Song-Wei,Stocklin, Jurg,Peng, De-Li,&Sun, Hang.(2020).Recruitment of the high elevation cushion plant Arenaria polytrichoides is limited by competition, thus threatened by currently established vegetation.JOURNAL OF SYSTEMATICS AND EVOLUTION,58(1),59-68.
MLA	Chen, Jian-Guo,et al."Recruitment of the high elevation cushion plant Arenaria polytrichoides is limited by competition, thus threatened by currently established vegetation".JOURNAL OF SYSTEMATICS AND EVOLUTION 58.1(2020):59-68.