Changes in regeneration and leaf traits of Rhododendron campanulatum along a treeline ecotone in central Nepal

doi:10.1007/s11629-019-5386-y

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > Journal of Mountain Science > Journal of Mountain Science-2020 > Vol17 No.3

	Changes in regeneration and leaf traits of Rhododendron campanulatum along a treeline ecotone in central Nepal
	Sharma, Prasad Krishna; Tiwari, Achyut; Shrestha, Babu Bharat
刊名	JOURNAL OF MOUNTAIN SCIENCE
	2020
卷号	17 期号:3 页码:602-613
关键词	Rhododendron Climate change Life table Mortality Specific leaf area Mustang district
ISSN号	1672-6316
DOI	10.1007/s11629-019-5386-y
文献子类	Article
英文摘要	Changes in population structure and plant functional traits across environmental gradient in the near natural treeline is a critical determinant of environmental changes in treelines. In this study we analyzed population characteristics and leaf traits of Rhododendron campanulatum across treeline ecotone in a trans-Himalayan region of Mustang district in central Nepal. Along 4 vertical transects, a total of 72 quadrats (5 m 5 m) - 34 above Betula utilis treeline and 38 below treeline - were sampled to analyze the population structure, regeneration, specific leaf area (SLA) and leaf-stem relationship of R. campanulatum. Our results showed that the regeneration of R. campanulatum was fairly good in both habitats, as evident from density-diameter curve. The species showed type III survivorship curve in both habitats with the highest mortality during early stage of life. However, the seedling density and mortality was higher below treeline than above treeline. Canopy cover and basal cover were found to be the major factors affecting regeneration, as indicated by higher number of juveniles in relatively open areas above treeline. The total leaf area increased (p<0.001) with stem cross-section area in both habitats. However, the SLA was higher below treeline (55 cm2/g) than above (47 cm2/g) (p> 0.001); it also increased with the canopy cover of trees (R = 0.59, p<0.001) below the treeline. In conclusion, high density of juvenile, low mortality of seedlings, and low SLA above treeline indicated that the species has successfully adapted in climatically stressful alpine habitat with potential to expand upward.
电子版国际标准刊号	1993-0321
语种	英语
WOS记录号	WOS:000519163500008
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/46780]
专题	Journal of Mountain Science_Journal of Mountain Science-2020_Vol17 No.3
推荐引用方式 GB/T 7714	Sharma, Prasad Krishna,Tiwari, Achyut,Shrestha, Babu Bharat. Changes in regeneration and leaf traits of Rhododendron campanulatum along a treeline ecotone in central Nepal[J]. JOURNAL OF MOUNTAIN SCIENCE,2020,17(3):602-613.
APA	Sharma, Prasad Krishna,Tiwari, Achyut,&Shrestha, Babu Bharat.(2020).Changes in regeneration and leaf traits of Rhododendron campanulatum along a treeline ecotone in central Nepal.JOURNAL OF MOUNTAIN SCIENCE,17(3),602-613.
MLA	Sharma, Prasad Krishna,et al."Changes in regeneration and leaf traits of Rhododendron campanulatum along a treeline ecotone in central Nepal".JOURNAL OF MOUNTAIN SCIENCE 17.3(2020):602-613.