Ecological fragmentation two years after a major landslide: Correlations between vegetation indices and geo-environmental factors

doi:10.1016/j.ecoleng.2020.105914

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 > 数字山地与遥感应用中心

	Ecological fragmentation two years after a major landslide: Correlations between vegetation indices and geo-environmental factors
	Gomes, Pattiyage I.A.3; Aththanayake, Uthpalana 3; Deng, Wei 1,2; Li, Ainong 1,2; Zhao, Wei 1,2; Jayathilaka, Tharaka 3
刊名	Ecological Engineering
	2020
卷号	153 页码:105914
关键词	Detrended correspondence analysis Environmental factors Environmental variables Management strategies Spatial variations Spatially explicit Temporal trajectories Tropical environments
ISSN号	0925-8574
DOI	10.1016/j.ecoleng.2020.105914
通讯作者	Gomes, Pattiyage I. A.(ishan_gomes@yahoo.com)
产权排序	2
文献子类	Article
英文摘要	This study was carried out about two years after a major landslide took place in Aranayake, Sri Lanka to evaluate geo-ecological status quo (spatial variation of vegetation and geo-environmental variables, and the correlations between them), and to identify spatially explicit landscape units (ecotopes). Sampling was done continuously based on a mesh covering visual landslide patch (disturbed area) and its surrounding (undisturbed area). When overlaid with the visual landslide patch, the contours of tree diversity, above ground herb dead biomass, and soil toughness (resistance to penetration) showed a good spatial match or a responsiveness. In contrast, herb diversity and landslide patch did not spatially match. As expected, soil physio-chemistry (soil moisture, organic content, soil toughness, etc.) of the disturbed and undisturbed areas showed significant differences. In contrast to many past studies the disturbed areas showed a better herb diversity, yet in agreement they were mostly non-native or invasive species. Detrended correspondence analyses revealed the fragmentation was more than a mere separation as disturbed and undisturbed; the disturbed area showed a further fragmentation based on the terrain as hilly and flat. Therefore, the single ecotope existed before the landslide, changed into three. The correlations between vegetative indices and geo-environmental variables in general, varied with the ecotope, elucidating the need of different management strategies. Soil toughness of disturbed areas was significantly lesser than the undisturbed. However, force required to uproot herbs were similar in disturbed and undisturbed areas, indicating adaptation and/or colonization of stress tolerant plants. While agreeing that the area is not suitable for human settlements, we propose to use the area for controlled agriculture, fire wood collection, tourism activities and biodiversity studies, instead of total abandonment. This study gave important baseline data on dynamics of biotic and abiotic factors of a landslide in a tropical environment. Further studies should be continued in the long run to evaluate succession of flora and to identify temporal trajectories of biotic and abiotic factors. © 2020 Elsevier B.V.
资助项目	National Research Council of Sri Lanka[NRC 17-066]
WOS关键词	PLANT SUCCESSION ; SOIL ; DIVERSITY ; IMPACTS ; EROSION ; FOREST ; DISTURBANCE ; MOUNTAINS
WOS研究方向	Environmental Sciences & Ecology ; Engineering
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000539991300014
资助机构	National Research Council of Sri Lanka
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/34646]
专题	成都山地灾害与环境研究所_数字山地与遥感应用中心成都山地灾害与环境研究所_山区发展研究中心
通讯作者	Gomes, Pattiyage I.A.
作者单位	1.Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, China; 2.Kathmandu Center for Research and Education, Chinese Academy of Sciences-Tribhuvan University, Beijing; 100101, China 3.Department of Civil Engineering, Faculty of Engineering, Sri Lanka Institute of Information Technology, Malabe, Sri Lanka;
推荐引用方式 GB/T 7714	Gomes, Pattiyage I.A.,Aththanayake, Uthpalana,Deng, Wei,et al. Ecological fragmentation two years after a major landslide: Correlations between vegetation indices and geo-environmental factors[J]. Ecological Engineering,2020,153:105914.
APA	Gomes, Pattiyage I.A.,Aththanayake, Uthpalana,Deng, Wei,Li, Ainong,Zhao, Wei,&Jayathilaka, Tharaka.(2020).Ecological fragmentation two years after a major landslide: Correlations between vegetation indices and geo-environmental factors.Ecological Engineering,153,105914.
MLA	Gomes, Pattiyage I.A.,et al."Ecological fragmentation two years after a major landslide: Correlations between vegetation indices and geo-environmental factors".Ecological Engineering 153(2020):105914.