Composition and structure of species along altitude gradient in Moghan-Sabalan rangelands, Iran

doi:10.1007/s11629-017-4820-2

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-2018 > Vol15 No.6

	Composition and structure of species along altitude gradient in Moghan-Sabalan rangelands, Iran
	Ghafari, S; Ghorbani, A; Moameri, M; Mostafazadeh, R; Bidarlord, M
刊名	JOURNAL OF MOUNTAIN SCIENCE
	2018
卷号	15 期号:6 页码:1209-1228
关键词	Flora Floristic diversity Species distribution Elevation Red data categories Endemic Ardabili province
ISSN号	1672-6316
DOI	10.1007/s11629-017-4820-2
文献子类	Article
英文摘要	This study provides a checklist of species distributed at the altitude gradient of Moghan-Sabalan rangelands in Ardabili province, Northwest Iran. We evaluated the changes in species composition, growth types of species, Raunkiaer's life forms, geographical distribution, threat and endemicity status, and palatability of species along two altitudinal gradients in the sampling plots, which were conducted in eleven sites/habitats with 300 meters above sea level (masl) altitude intervals (from 100 to 3300 masl). We assessed the plant species composition with special reference to the gradient analysis, and identified overall 396 species, which was comprising 44 families and 194 genera. Results showed that Asteraceae family is by far the most species-rich family, followed by Poaceae, Fabaceae, Caryophyllaceae and Brassicaceae. Among the genera, Astragalus is the most diverse genus, followed by Allium, Veronica and Bromus, Galium, Silene and Ranunculus. Results indicated that the number of species increased as the altitude increased to 1200-1500 masl, but then starts to decline to 3300 masl. Family-to-genera ratio was 1:4.4, the family-tospecies ratio was 1:9, and the genera-to-species ratio was 1:2.04. Growth type of species analysis shows that the frequency of perennial plants was higher in the study area followed by annual species while the lower group was biennial species. The number of annuals showed a decreasing trend towards higher altitude. Hemicryptophytes and therophytes were the most frequent life forms constituted each with (41.9%). Hemicryptophytes showed an increasing trend with altitude, while therophytes showed a decreasing trend with altitude increase, followed by geophytes, chamaephytes, and phanerophytes. Results showed more than half of the species of the study area belonged to Iran-Turanian region and these species showed an increasing trend with altitude. In contrast, Sahara-Sindian species comprise a minor component of the spectrum, with decreasing trend with altitude. The rare and endangered species out of the surveyed taxonomic groups comprised 53 species in total which 29 of them are considered lower risk (LR), 13 data deficient (DD), 5 vulnerable (Vu) and with 3 rare (R) and identified endemic plants comprised 24 species. Some 56.6% species were identified as class III, 22.6% were class I and 20.8% were class II as the palatability variation. Moghan-Sabalan rangelands require strong conservation management policies in case of species loss and changing natural communities due to the occurrence of conversion into cropland, over-grazing and other anthropogenic effects.
电子版国际标准刊号	1993-0321
语种	英语
WOS记录号	WOS:000435362700005
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/35506]
专题	Journal of Mountain Science_Journal of Mountain Science-2018_Vol15 No.6
推荐引用方式 GB/T 7714	Ghafari, S,Ghorbani, A,Moameri, M,et al. Composition and structure of species along altitude gradient in Moghan-Sabalan rangelands, Iran[J]. JOURNAL OF MOUNTAIN SCIENCE,2018,15(6):1209-1228.
APA	Ghafari, S,Ghorbani, A,Moameri, M,Mostafazadeh, R,&Bidarlord, M.(2018).Composition and structure of species along altitude gradient in Moghan-Sabalan rangelands, Iran.JOURNAL OF MOUNTAIN SCIENCE,15(6),1209-1228.
MLA	Ghafari, S,et al."Composition and structure of species along altitude gradient in Moghan-Sabalan rangelands, Iran".JOURNAL OF MOUNTAIN SCIENCE 15.6(2018):1209-1228.