Estimation of boreal forest floor lichen cover using hyperspectral airborne and field data
Lichens are sensitive to competition from vascular plants, intensive silviculture, pollution and reindeer and caribou grazing, and can therefore serve as indicators of environmental changes. Hyperspectral remote sensing data has been proved promising for estimation of plant diversity, but its potent...
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| Format: | Article |
| Language: | English |
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Finnish Society of Forest Science
2023-03-01
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| Series: | Silva Fennica |
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| Online Access: | https://www.silvafennica.fi/article/22014 |
| _version_ | 1797300185802473472 |
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| author | Nea Kuusinen Aarne Hovi Miina Rautiainen |
| author_facet | Nea Kuusinen Aarne Hovi Miina Rautiainen |
| author_sort | Nea Kuusinen |
| collection | DOAJ |
| description | Lichens are sensitive to competition from vascular plants, intensive silviculture, pollution and reindeer and caribou grazing, and can therefore serve as indicators of environmental changes. Hyperspectral remote sensing data has been proved promising for estimation of plant diversity, but its potential for forest floor lichen cover estimation has not yet been studied. In this study, we investigated the use of hyperspectral data in estimating ground lichen cover in boreal forest stands in Finland. We acquired airborne and in situ hyperspectral data of lichen-covered forest plots, and applied multiple endmember spectral mixture analysis to estimate the fractional cover of ground lichens in these plots. Estimation of lichen cover based on in situ spectral data was very accurate (coefficient of determination (r2) 0.95, root mean square error (RMSE) 6.2). Estimation of lichen cover based on airborne data, on the other hand, was fairly good (r2 0.77, RMSE 11.7), but depended on the choice of spectral bands. When the hyperspectral data were resampled to the spectral resolution of Sentinel-2, slightly weaker results were obtained. Tree canopy cover near the flight plots was weakly related to the difference between estimated and measured lichen cover. The results also implied that the presence of dwarf shrubs could influence the lichen cover estimates. |
| first_indexed | 2024-03-07T23:03:38Z |
| format | Article |
| id | doaj.art-e63b1e0e95944233bb9be8f44afc1902 |
| institution | Directory Open Access Journal |
| issn | 2242-4075 |
| language | English |
| last_indexed | 2024-03-07T23:03:38Z |
| publishDate | 2023-03-01 |
| publisher | Finnish Society of Forest Science |
| record_format | Article |
| series | Silva Fennica |
| spelling | doaj.art-e63b1e0e95944233bb9be8f44afc19022024-02-22T10:57:39ZengFinnish Society of Forest ScienceSilva Fennica2242-40752023-03-0157110.14214/sf.22014Estimation of boreal forest floor lichen cover using hyperspectral airborne and field dataNea Kuusinen0https://orcid.org/0000-0002-8063-1739Aarne Hovi1https://orcid.org/0000-0002-4384-5279Miina Rautiainen2https://orcid.org/0000-0002-6568-3258Department of Built Environment, School of Engineering, Aalto University, P.O. Box 14100, FI-00076 Aalto, FinlandDepartment of Built Environment, School of Engineering, Aalto University, P.O. Box 14100, FI-00076 Aalto, FinlandDepartment of Built Environment, School of Engineering, Aalto University, P.O. Box 14100, FI-00076 Aalto, FinlandLichens are sensitive to competition from vascular plants, intensive silviculture, pollution and reindeer and caribou grazing, and can therefore serve as indicators of environmental changes. Hyperspectral remote sensing data has been proved promising for estimation of plant diversity, but its potential for forest floor lichen cover estimation has not yet been studied. In this study, we investigated the use of hyperspectral data in estimating ground lichen cover in boreal forest stands in Finland. We acquired airborne and in situ hyperspectral data of lichen-covered forest plots, and applied multiple endmember spectral mixture analysis to estimate the fractional cover of ground lichens in these plots. Estimation of lichen cover based on in situ spectral data was very accurate (coefficient of determination (r2) 0.95, root mean square error (RMSE) 6.2). Estimation of lichen cover based on airborne data, on the other hand, was fairly good (r2 0.77, RMSE 11.7), but depended on the choice of spectral bands. When the hyperspectral data were resampled to the spectral resolution of Sentinel-2, slightly weaker results were obtained. Tree canopy cover near the flight plots was weakly related to the difference between estimated and measured lichen cover. The results also implied that the presence of dwarf shrubs could influence the lichen cover estimates.https://www.silvafennica.fi/article/22014remote sensing; cladonia; spectroscopy |
| spellingShingle | Nea Kuusinen Aarne Hovi Miina Rautiainen Estimation of boreal forest floor lichen cover using hyperspectral airborne and field data Silva Fennica remote sensing; cladonia; spectroscopy |
| title | Estimation of boreal forest floor lichen cover using hyperspectral airborne and field data |
| title_full | Estimation of boreal forest floor lichen cover using hyperspectral airborne and field data |
| title_fullStr | Estimation of boreal forest floor lichen cover using hyperspectral airborne and field data |
| title_full_unstemmed | Estimation of boreal forest floor lichen cover using hyperspectral airborne and field data |
| title_short | Estimation of boreal forest floor lichen cover using hyperspectral airborne and field data |
| title_sort | estimation of boreal forest floor lichen cover using hyperspectral airborne and field data |
| topic | remote sensing; cladonia; spectroscopy |
| url | https://www.silvafennica.fi/article/22014 |
| work_keys_str_mv | AT neakuusinen estimationofborealforestfloorlichencoverusinghyperspectralairborneandfielddata AT aarnehovi estimationofborealforestfloorlichencoverusinghyperspectralairborneandfielddata AT miinarautiainen estimationofborealforestfloorlichencoverusinghyperspectralairborneandfielddata |