气候变化领域集成服务门户(CCPortal): A spectral analysis of common boreal ground lichen species

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DOI	10.1016/j.rse.2020.111955
	A spectral analysis of common boreal ground lichen species
	Kuusinen N.; Juola J.; Karki B.; Stenroos S.; Rautiainen M.
发表日期	2020
ISSN	00344257
卷号	247
英文摘要	Lichens dominate a significant part of the Earth's land surface, and are valuable bioindicators of various environmental changes. In the northern hemisphere, the largest lichen biomass is in the woodlands and heathlands of the boreal zone and in tundra. Despite the global coverage of lichens, there has been only limited research on their spectral properties in the context of remote sensing of the environment. In this paper, we report spectral properties of 12 common boreal lichen species. Measurements of reflectance spectra were made in laboratory conditions with a standard spectrometer (350–2500 nm) and a novel mobile hyperspectral camera (400–1000 nm) which was used in a multiangular setting. Our results show that interspecific differences in reflectance spectra were the most pronounced in the ultraviolet and visible spectral range, and that dry samples always had higher reflectance than fresh (moist) samples in the shortwave infrared region. All study species had higher reflectance in the backward scattering direction compared to nadir or forward scattering directions. Our results also reveal, for the first time, that there is large intraspecific variation in reflectance of lichen species. This emphasizes the importance of measuring several replicates of each species when analyzing lichen spectra. In addition, we used the data in a spectral clustering analysis to study the spectral similarity between samples and species, and how these similarities could be linked to different physical traits or phylogenetic closeness of the species. Overall, our results suggest that spectra of some lichen species with large ground coverage can be used for species identification from high spatial resolution remote sensing imagery. On the other hand, for lichen species growing as small assemblages, mobile hyperspectral cameras may offer a solution for in-situ species identification. The spectral library collected in this study is available in the SPECCHIO Spectral Information System. © 2020 The Authors
英文关键词	Cetraria; Cladonia; Hyperspectral; Multiangular; Reflectance spectra; Stereocaulon
语种	英语
scopus关键词	Cameras; Clustering algorithms; Forward scattering; Reflection; Remote sensing; Spectrum analysis; High spatial resolution; Hyper-spectral cameras; Interspecific differences; Intraspecific variation; Laboratory conditions; Remote sensing imagery; Species identification; Visible spectral range; Fungi; bioindicator; biomass; Boreal Kingdom; environmental change; heathland; lichen; Northern Hemisphere; remote sensing; spectral analysis; spectral reflectance; woodland; Cetraria; Cladonia; Stereocaulon
来源期刊	Remote Sensing of Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/179234
作者单位	Department of Built Environment, School of Engineering, Aalto University, P.O. Box 14100, Aalto, FI-00076, Finland; Botany Unit, Finnish Museum of Natural History, University of Helsinki, P.O. Box 7FI-00014, Finland; Department of Electronics and Nanoengineering, School of Electrical Engineering, Aalto University, P.O. Box 15500, Aalto, 00076, Finland
推荐引用方式 GB/T 7714	Kuusinen N.,Juola J.,Karki B.,et al. A spectral analysis of common boreal ground lichen species[J],2020,247.
APA	Kuusinen N.,Juola J.,Karki B.,Stenroos S.,&Rautiainen M..(2020).A spectral analysis of common boreal ground lichen species.Remote Sensing of Environment,247.
MLA	Kuusinen N.,et al."A spectral analysis of common boreal ground lichen species".Remote Sensing of Environment 247(2020).