Impact of anthropogenic disturbance on species diversity and vegetation structure of a lowland tropical rainforest of eastern Himalaya, India

doi:10.1007/s11629-017-4713-4

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.11

	Impact of anthropogenic disturbance on species diversity and vegetation structure of a lowland tropical rainforest of eastern Himalaya, India
	Gogoi, Anudip; Sahoo, Uttam Kumar
刊名	JOURNAL OF MOUNTAIN SCIENCE
	2018
卷号	15 期号:11 页码:2453-2465
关键词	Biodiversity Deforestation Abundance Vegetation Dynamics Conservation Management
ISSN号	1672-6316
DOI	10.1007/s11629-017-4713-4
文献子类	Article
英文摘要	Impact of anthropogenic disturbance on species diversity and vegetation structure of a lowland tropical rainforest was studied in the foothills of Eastern Himalaya, India. Tree species richness, density, basal area and the diversity indices were found significantly (P<0.05) decreased with the increasing level of disturbances whereas, shrub density, basal area and herb density significantly increased with increasing disturbance level. In case of shrubs, Simpson's dominance index significantly (P<0.007) increased along the disturbance gradient, whereas Pielou's evenness index significantly (P<0.005) decreased with an increasing level of disturbance. Shannon-Weiner diversity index for herbs significantly (P<0.016) increased with increasing disturbance whereas, Simpson's dominance index was significantly (P<0.013) declined along the disturbance gradient. Results revealed that 10-50 cm dbh classes constituted the highest stem density, and highest basal area was recorded in the >100 cm dbh class in all three sites. Density of the matured trees decreased with increasing DBH whereas, tree basal area tended to increase with increasing DBH in all three sites. Tree species richness was highest in the lower DBH classes. 62.07% of the total tree species regenerated in the largely undisturbed site followed by 50% in the mildly disturbed and 26.32% in the highly disturbed site. The overall regeneration condition was found to be good in the largely undisturbed site. Mildly disturbed site exhibited fair regeneration and so was in the highly disturbed site. Discernable variations in species composition, diversity, regeneration and tree population structure revealed the impact of anthropogenic disturbances on rainforest vegetation dynamics. Higher degree of disturbance was furtherly found not only affecting species diversity but also promoting the growth of invasive weed species. Dominance of Hydnocarpus kurzii and Crypteronia paniculata in the highly disturbed site also indicated that these less-valued timber species may benefit from the vegetation mosaic produced by the disturbance; so differences in abundance of these species may be useful for bio-indication. Furthermore, present study suggests the need of adequate biodiversity conservation measures and adaptation of sustainable forest management approaches in disturbed areas of lowland tropical rainforest in the foothills of eastern Himalaya, India.
电子版国际标准刊号	1993-0321
语种	英语
WOS记录号	WOS:000450458300010
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/46347]
专题	Journal of Mountain Science_Journal of Mountain Science-2018_Vol15 No.11
推荐引用方式 GB/T 7714	Gogoi, Anudip,Sahoo, Uttam Kumar. Impact of anthropogenic disturbance on species diversity and vegetation structure of a lowland tropical rainforest of eastern Himalaya, India[J]. JOURNAL OF MOUNTAIN SCIENCE,2018,15(11):2453-2465.
APA	Gogoi, Anudip,&Sahoo, Uttam Kumar.(2018).Impact of anthropogenic disturbance on species diversity and vegetation structure of a lowland tropical rainforest of eastern Himalaya, India.JOURNAL OF MOUNTAIN SCIENCE,15(11),2453-2465.
MLA	Gogoi, Anudip,et al."Impact of anthropogenic disturbance on species diversity and vegetation structure of a lowland tropical rainforest of eastern Himalaya, India".JOURNAL OF MOUNTAIN SCIENCE 15.11(2018):2453-2465.