A spectral analysis of common boreal ground lichen species
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, t...
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/318182 2024-01-07T09:47:08+01:00 A spectral analysis of common boreal ground lichen species Kuusinen, Nea Juola, Jussi Karki, Bijay Stenroos, Soili Rautiainen, Miina Botany University Management 2020-08-06T11:49:01Z 13 application/pdf http://hdl.handle.net/10138/318182 eng eng EXCERPTA MEDICA INC-ELSEVIER SCIENCE INC 10.1016/j.rse.2020.111955 The study was funded by Academy of Finland (grant: DIMEBO, 323004). This study has also received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (grant agreement No 771049). The text reflects only the authors' view and the Agency is not responsible for any use that may be made of the information it contains. We also wish to thank four anonymous reviewers for constructive comments. Kuusinen , N , Juola , J , Karki , B , Stenroos , S & Rautiainen , M 2020 , ' A spectral analysis of common boreal ground lichen species ' , Remote Sensing of Environment , vol. 247 , 111955 . https://doi.org/10.1016/j.rse.2020.111955 ORCID: /0000-0003-0331-792X/work/78467259 a5f96b28-ec47-42ef-ba3c-1dc88ce60cf3 http://hdl.handle.net/10138/318182 000549189200052 cc_by_nc_nd openAccess info:eu-repo/semantics/openAccess Cetraria Cladonia Hyperspectral Multiangular Reflectance spectra Stereocaulon VEGETATION CORTICES MOSSES IMPACT 1181 Ecology evolutionary biology 1172 Environmental sciences Article publishedVersion 2020 ftunivhelsihelda 2023-12-14T00:12:31Z 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. Peer reviewed Article in Journal/Newspaper Tundra HELDA – University of Helsinki Open Repository Remote Sensing of Environment 247 111955 |
institution |
Open Polar |
collection |
HELDA – University of Helsinki Open Repository |
op_collection_id |
ftunivhelsihelda |
language |
English |
topic |
Cetraria Cladonia Hyperspectral Multiangular Reflectance spectra Stereocaulon VEGETATION CORTICES MOSSES IMPACT 1181 Ecology evolutionary biology 1172 Environmental sciences |
spellingShingle |
Cetraria Cladonia Hyperspectral Multiangular Reflectance spectra Stereocaulon VEGETATION CORTICES MOSSES IMPACT 1181 Ecology evolutionary biology 1172 Environmental sciences Kuusinen, Nea Juola, Jussi Karki, Bijay Stenroos, Soili Rautiainen, Miina A spectral analysis of common boreal ground lichen species |
topic_facet |
Cetraria Cladonia Hyperspectral Multiangular Reflectance spectra Stereocaulon VEGETATION CORTICES MOSSES IMPACT 1181 Ecology evolutionary biology 1172 Environmental sciences |
description |
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. Peer reviewed |
author2 |
Botany University Management |
format |
Article in Journal/Newspaper |
author |
Kuusinen, Nea Juola, Jussi Karki, Bijay Stenroos, Soili Rautiainen, Miina |
author_facet |
Kuusinen, Nea Juola, Jussi Karki, Bijay Stenroos, Soili Rautiainen, Miina |
author_sort |
Kuusinen, Nea |
title |
A spectral analysis of common boreal ground lichen species |
title_short |
A spectral analysis of common boreal ground lichen species |
title_full |
A spectral analysis of common boreal ground lichen species |
title_fullStr |
A spectral analysis of common boreal ground lichen species |
title_full_unstemmed |
A spectral analysis of common boreal ground lichen species |
title_sort |
spectral analysis of common boreal ground lichen species |
publisher |
EXCERPTA MEDICA INC-ELSEVIER SCIENCE INC |
publishDate |
2020 |
url |
http://hdl.handle.net/10138/318182 |
genre |
Tundra |
genre_facet |
Tundra |
op_relation |
10.1016/j.rse.2020.111955 The study was funded by Academy of Finland (grant: DIMEBO, 323004). This study has also received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (grant agreement No 771049). The text reflects only the authors' view and the Agency is not responsible for any use that may be made of the information it contains. We also wish to thank four anonymous reviewers for constructive comments. Kuusinen , N , Juola , J , Karki , B , Stenroos , S & Rautiainen , M 2020 , ' A spectral analysis of common boreal ground lichen species ' , Remote Sensing of Environment , vol. 247 , 111955 . https://doi.org/10.1016/j.rse.2020.111955 ORCID: /0000-0003-0331-792X/work/78467259 a5f96b28-ec47-42ef-ba3c-1dc88ce60cf3 http://hdl.handle.net/10138/318182 000549189200052 |
op_rights |
cc_by_nc_nd openAccess info:eu-repo/semantics/openAccess |
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Remote Sensing of Environment |
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247 |
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111955 |
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