干旱区生态环境知识资源中心(Arid): Estimating fractional cover of non-photosynthetic vegetation for various grasslands based on CAI and DFI

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DOI	10.1016/j.ecolind.2021.108252
	Estimating fractional cover of non-photosynthetic vegetation for various grasslands based on CAI and DFI
	Bai, Xuelian; Zhao, Wenzhi; Ji, Shuxin; Qiao, Rongrong; Dong, Chunyuan; Chang, Xueli
通讯作者	Chang, XL (corresponding author), Ludong Univ, Coll Resources & Environm Engn, Yantai 264025, Peoples R China.
来源期刊	ECOLOGICAL INDICATORS
ISSN	1470-160X
EISSN	1872-7034
出版年	2021
卷号	131
英文摘要	Non-photosynthetic vegetation (NPV) is a vital component of terrestrial ecosystems and an important indicator of grassland degradation, therefore, it is of great significance to realize its accurate evaluation. Here, we analyzed spectral characteristics of NPV of different biomass types in undisturbed vegetation (herb, subshrub and shrub), and established relationship models among dead fuel index (DFI), cellulose absorption index (CAI) and fractional cover of NPV (fNPV) based on ground hyperspectral data; then, fNPV of four grassland types were evaluated based on the models. Our results showed that: (1) NPV reflectance exhibited similar change trends for herb, subshrub, shrub, and a mixed type, although there were significant differences among values, (2) DFI and CAI, CAI and fNPV, DFI and fNPV were significantly positively correlated (p < 0.001), (3) the maximum fNPV estimation accuracy of CAI was higher than that of DFI, and the values were 85 and 75%, respectively, (4) fNPV differed significantly among the four grasslands, with highest in meadow grassland (77%) and lowest in desert grassland (43%). We conclude that fNPV has obvious heterogeneity among different vegetation types, and both CAI and DFI can be used to reflect fNPV although there is difference in evaluation performance.
英文关键词	Non-photosynthetic vegetation Dead fuel index Cellulose absorption index Evaluation model
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000704550000005
WOS关键词	PHOTOSYNTHETIC VEGETATION ; PLANT LITTER ; BARE SOIL ; RESIDUE ; INDEX ; NDVI ; DYNAMICS ; BIOMASS ; STEPPE
WOS类目	Biodiversity Conservation ; Environmental Sciences
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/363007
作者单位	[Bai, Xuelian; Zhao, Wenzhi] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Ecohydrol Inland River Basin, Linze Inland River Basin Res Stn,Chinese Ecosyst, Lanzhou 730000, Peoples R China; [Ji, Shuxin; Qiao, Rongrong; Dong, Chunyuan; Chang, Xueli] Ludong Univ, Coll Resources & Environm Engn, Yantai 264025, Peoples R China; [Bai, Xuelian] Univ Chinese Acad Sci, Beijing 100875, Peoples R China
推荐引用方式 GB/T 7714	Bai, Xuelian,Zhao, Wenzhi,Ji, Shuxin,et al. Estimating fractional cover of non-photosynthetic vegetation for various grasslands based on CAI and DFI[J],2021,131.
APA	Bai, Xuelian,Zhao, Wenzhi,Ji, Shuxin,Qiao, Rongrong,Dong, Chunyuan,&Chang, Xueli.(2021).Estimating fractional cover of non-photosynthetic vegetation for various grasslands based on CAI and DFI.ECOLOGICAL INDICATORS,131.
MLA	Bai, Xuelian,et al."Estimating fractional cover of non-photosynthetic vegetation for various grasslands based on CAI and DFI".ECOLOGICAL INDICATORS 131(2021).