干旱区生态环境知识资源中心(Arid): Spectral Response Assessment of Moss-Dominated Biological Soil Crust Coverage Under Dry and Wet Conditions

Arid

DOI	10.3390/rs12071158
	Spectral Response Assessment of Moss-Dominated Biological Soil Crust Coverage Under Dry and Wet Conditions
	Chen, Xiang 1,2,3; Wang, Tao1,2 ; Liu, Shulin 1; Peng, Fei 1,4; Kang, Wenping 1,2; Guo, Zichen 1,2; Feng, Kun 1,2; Liu, Jia 3; Tsunekawa, Atsushi 3
通讯作者	Liu, Shulin
来源期刊	REMOTE SENSING
EISSN	2072-4292
出版年	2020
卷号	12 期号:7
英文摘要	Biological soil crusts (BSCs) are a major functional vegetation unit, covering extensive parts of drylands worldwide. Therefore, several multispectral indices have been proposed to map the spatial distribution and coverage of BSCs. BSCs are composed of poikilohydric organisms, the activity of which is sensitive to water availability. However, studies on dry and wet BSCs have seldom considered the mixed coverage gradient that is representative of actual field conditions. In this study, in situ spectral data and photographs of 136 pairs of dry and wet plots were collected to determine the influence of moisture conditions on BSC coverage detection. Then, BSC spectral reflectance and continuum removal (CR) reflectance responses to wetting were analyzed. Finally, the responses of four commonly used indices (i.e., normalized difference vegetation index (NDVI); crust index (CI); biological soil crust index (BSCI); and band depth of absorption feature after CR in the red band, (BD_red)), calculated from in situ hyperspectral data resampled to two multispectral data channels (Landsat-8 and Sentinel-2), were compared in dry and wet conditions. The results indicate that: (i) on average, the estimated BSC coverage using red-green-blue (RGB) images is 14.98% higher in wet than in dry conditions (P < 0.001); (ii) CR reflectance features of wet BSCs are more obvious than those of dry BSCs in both red and red-edge bands; and (iii) NDVI, CI, and BSCI for BSC coverage of 0%-60% under dry and wet conditions are close to those of dry and wet bare sand, respectively. NDVI and BD_red cannot separate dead wood and BSC with low coverage. This study demonstrates that low-coverage moss-dominated BSC is not easily detected by the four indices. In the future, remote-sensing data obtained during the rainy season with red and red-edge bands should be considered to detect BSCs.
英文关键词	moss-dominated biological soil crusts (moss-dominated BSCs) dry-wet conditions BSC coverage in situ spectral reflectance continuum removal (CR) normalized difference vegetation index (NDVI) crust index (CI) biological soil crust index (BSCI) Mu Us Sandy Land drylands
类型	Article
语种	英语
国家	Peoples R China ; Japan
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000537709600108
WOS关键词	VEGETATION ; INDEX ; REFLECTANCE ; DESERT ; CARBON ; NITROGEN ; NDVI
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/318947
作者单位	1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Desert & Desertificat, Lanzhou 730000, Peoples R China; 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 3.Tottori Univ, Arid Land Res Ctr, Tottori 6800001, Japan; 4.Tottori Univ, Int Platform Dryland Res & Educ, Tottori 6800001, Japan
推荐引用方式 GB/T 7714	Chen, Xiang,Wang, Tao,Liu, Shulin,et al. Spectral Response Assessment of Moss-Dominated Biological Soil Crust Coverage Under Dry and Wet Conditions[J],2020,12(7).
APA	Chen, Xiang.,Wang, Tao.,Liu, Shulin.,Peng, Fei.,Kang, Wenping.,...&Tsunekawa, Atsushi.(2020).Spectral Response Assessment of Moss-Dominated Biological Soil Crust Coverage Under Dry and Wet Conditions.REMOTE SENSING,12(7).
MLA	Chen, Xiang,et al."Spectral Response Assessment of Moss-Dominated Biological Soil Crust Coverage Under Dry and Wet Conditions".REMOTE SENSING 12.7(2020).