干旱区生态环境知识资源中心(Arid): Detecting degraded, prone and transition ecosystems by environmental thresholds and spectral functions

Arid

DOI	10.1016/j.rsase.2021.100503
	Detecting degraded, prone and transition ecosystems by environmental thresholds and spectral functions
	Abdollahzadeh, Sara; Sepehr, Adel; Rashki, Alireza
通讯作者	Sepehr, A (corresponding author), Ferdowsi Univ Mashhad, Dept Desert & Arid Zones Management, Mashhad, Razavi Khorasan, Iran.
来源期刊	REMOTE SENSING APPLICATIONS-SOCIETY AND ENVIRONMENT
ISSN	2352-9385
出版年	2021
卷号	22
英文摘要	For determining of the desert ecosystem based on transition zones, a quantitative approach was applied in Khorasan Razavi province in northeast of Iran. The spectral and morphological algorithms were implemented in remote-sensing images of MODIS surface reflectance in order to determine the ecogeomorphic thresholds between the transition zones of the semi-arid ecosystems. Furthermore, the spectral angle mapper analysis was applied for the surface conditions and the mathematical morphology algorithm of dilation was used for identifying the recovery and erodibility potential trends in the heterogeneous land surface covers. A detailed assessment of the mapping was achieved by implementation of an iterative self-organized clustering technique (ISODATA) and calculation of separability of formed typologies classes using the transformed divergence algorithm. The assessment of NDVI (normalized difference vegetation index) in each cluster indicates an increasing trend of standard deviation, which shows maximum values near desert thresholds. According to the results, several desert thresholds were detected in susceptible ecosystems to desertification in Khorasan Razavi that were affected by natural and anthropogenic factors. Further evaluation shows the location of the transition zones and the thresholds under changing climatic conditions. In synopsis, in prone areas with the high potential to desertification, the ecosystem is susceptiblt to shift to desert state.
英文关键词	Desert thresholds Spectral algorithms Morphological algorithm Spatial instability Erodibility and recovery potentials Transition zones
类型	Article
语种	英语
收录类别	ESCI
WOS记录号	WOS:000654763200033
WOS关键词	CATASTROPHIC SHIFTS ; VEGETATION ; PATTERNS ; RESILIENCE
WOS类目	Environmental Sciences ; Remote Sensing
WOS研究方向	Environmental Sciences & Ecology ; Remote Sensing
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/352951
作者单位	[Abdollahzadeh, Sara; Sepehr, Adel; Rashki, Alireza] Ferdowsi Univ Mashhad, Dept Desert & Arid Zones Management, Mashhad, Razavi Khorasan, Iran
推荐引用方式 GB/T 7714	Abdollahzadeh, Sara,Sepehr, Adel,Rashki, Alireza. Detecting degraded, prone and transition ecosystems by environmental thresholds and spectral functions[J],2021,22.
APA	Abdollahzadeh, Sara,Sepehr, Adel,&Rashki, Alireza.(2021).Detecting degraded, prone and transition ecosystems by environmental thresholds and spectral functions.REMOTE SENSING APPLICATIONS-SOCIETY AND ENVIRONMENT,22.
MLA	Abdollahzadeh, Sara,et al."Detecting degraded, prone and transition ecosystems by environmental thresholds and spectral functions".REMOTE SENSING APPLICATIONS-SOCIETY AND ENVIRONMENT 22(2021).