干旱区生态环境知识资源中心(Arid): Demography of the giant monocarpic herb Rheum nobile in the Himalayas and the effect of disturbances by grazing

Arid

DOI	10.1093/aob/mcz178
	Demography of the giant monocarpic herb Rheum nobile in the Himalayas and the effect of disturbances by grazing
	Song, Bo 1; Stoll, Peter 2; Peng, Deli 3; Sun, Hang 1; Stocklin, Jurg 4
通讯作者	Sun, Hang ; Stocklin, Jurg
来源期刊	ANNALS OF BOTANY
ISSN	0305-7364
EISSN	1095-8290
出版年	2020
卷号	125 期号:3 页码:447-458
英文摘要	Background Perennity of giant rosette species in combination with a single `big bang' reproduction followed by death of the genetic individual is relatively rare among plants. Such long-lived monocarpic plants are usually slow growing and can be found in deserts, bogs or in alpine regions of the tropics or sub-tropics. Due to their longevity, monocarpic perennials risk losing everything before reproduction, which make them particularly susceptible to disturbances. Because of the inherent difficulties in assessing whether long-lived populations are growing or declining, usually neither their demography nor the consequences of increasing grazing pressure are known. Methods We used integral projection modelling (IPM) to measure the growth rate and passage time to flowering of Rheum nobile, a monocarpic perennial, and one of the most striking alpine plants from the high Himalayas. Rosettes which were no longer found due to disturbances or grazing by yaks were either treated as missing or as dead in two series of analysis, thereby simulating demography with and without the impact of grazing cattle. Data were collected from plants at 4500 m a.s.l. in Shangri-la County, Yunnan Province, south-west China. In four consecutive years (2011-2014) and in two populations, 372 and 369 individuals were measured, respectively, and size-dependent growth, survival and fecundity parameters were estimated. In addition, germination percentage, seedling survival and establishment probability were assessed. Key results The probability of survival, flowering and fecundity were strongly size dependent. Time to reach flowering size was 33.5 years [95 % confidence interval (CI) 21.9-43.3, stochastic estimate from pooled transitions and populations]. The stochastic population growth rate (lambda(s)) of Rheum nobile was 1.013 (95 % CI 1.0101.017). When disturbance by grazing cattle (yaks) was accounted for in the model, lambda(s) dropped to values <1 (0.940, 95 % CI 0.938-0.943). Conclusion We conclude that natural populations of this unique species are viable, but that conservation efforts should be made to minimize disturbances by grazing and to protect this slow-growing flagship plant from the high Himalayas.
英文关键词	Flowering size integral projection model (IPM) semelparity seed-consuming pollination mutualism selection yak grazing
类型	Article
语种	英语
国家	Peoples R China ; Switzerland
开放获取类型	Bronze, Green Published
收录类别	SCI-E
WOS记录号	WOS:000540299400007
WOS关键词	INTEGRAL PROJECTION MODELS ; MATRIX POPULATION-MODELS ; THRESHOLD SIZE ; EVOLUTIONARY DEMOGRAPHY ; TRANSLUCENT BRACTS ; GROWTH ; SELECTION ; AGE ; CONSEQUENCES ; REPRODUCTION
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/318847
作者单位	1.Chinese Acad Sci, Kunming Inst Bot, Key Lab Plant Divers & Biogeog East Asian, 132 Lanhei Rd, Kunming 650201, Yunnan, Peoples R China; 2.Univ Basel, Dept Environm Sci, Conservat Biol, St Johanns Vorstadt 10, CH-4056 Basel, Switzerland; 3.Yunnan Normal Univ, Sch Life Sci, 768 Juxian St, Kunming 650500, Yunnan, Peoples R China; 4.Univ Basel, Inst Bot, Dept Environm Sci, Schonbeinstr 6, CH-4056 Basel, Switzerland
推荐引用方式 GB/T 7714	Song, Bo,Stoll, Peter,Peng, Deli,et al. Demography of the giant monocarpic herb Rheum nobile in the Himalayas and the effect of disturbances by grazing[J],2020,125(3):447-458.
APA	Song, Bo,Stoll, Peter,Peng, Deli,Sun, Hang,&Stocklin, Jurg.(2020).Demography of the giant monocarpic herb Rheum nobile in the Himalayas and the effect of disturbances by grazing.ANNALS OF BOTANY,125(3),447-458.
MLA	Song, Bo,et al."Demography of the giant monocarpic herb Rheum nobile in the Himalayas and the effect of disturbances by grazing".ANNALS OF BOTANY 125.3(2020):447-458.