Projects per year
Abstract
Remote sensing using spectral data has been commonly applied to retrieve tree layer properties while the monitoring of forest floor remains a less studied topic. We investigated the links between light availability at forest floor, and forest floor's spectral reflectance properties (350–2500 nm) and fractional cover across boreal and temperate Europe. We hypothesized that tree canopy structure (and thus, light availability at forest floor) is linked not only to the vegetation composition of forest floor, as has been shown previously, but also to forest floor's spectral reflectance properties, and that these relationships differ between forest biomes. Data were collected in situ from a total of 67 forest stands in southern boreal, hemiboreal, temperate floodplain, and temperate mountain sites. The variation of light availability at forest floor was linked to both the forest floor's composition and spectral reflectance properties. Each study site exhibited site-specific spectral features and a different mean reflectance spectrum. Openness in tree canopies was related to an increase in the fractional cover of vascular plants and to a decrease of plant litter, consequently enhancing the forest floors’ spectral absorptance features in the red and shortwave-infrared wavelengths, as well as reflectance in the near-infrared region. Also, the variations of normalized difference index values and red edge positions as functions light availability at forest floor and forest floor's composition were different for each site. Our results suggest that incorporating biome-specific relationships between tree canopy structure and forest floor reflectance properties would improve interpretation of optical remote sensing data. The measurement data are openly available.
Original language | English |
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Article number | 109481 |
Number of pages | 13 |
Journal | Agricultural and Forest Meteorology |
Volume | 336 |
DOIs | |
Publication status | Published - 1 Jun 2023 |
MoE publication type | A1 Journal article-refereed |
Keywords
- Boreal
- Hyperspectral
- Remote sensing
- Temperate
- Understory reflectance
Fingerprint
Dive into the research topics of 'Links between light availability and spectral properties of forest floor in European forests'. Together they form a unique fingerprint.Datasets
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Dataset of tree canopy structure, understory reflectance spectra and fractional cover in hemiboreal and temperate forest areas in Estonia and the Czech Republic
Forsström, P. (Creator), Hovi, A. (Contributor), Juola, J. (Contributor) & Rautiainen, M. (Contributor), Mendeley Data, 2 May 2023
DOI: 10.17632/9dx32rszp8.1, https://data.mendeley.com/datasets/9dx32rszp8
Dataset
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Dataset of understory reflectance spectra and fractional cover in a boreal forest area in Finland
Forsström, P. (Creator), Juola, J. (Creator), Hovi, A. (Creator) & Rautiainen, M. (Creator), Mendeley Data, 17 Aug 2021
DOI: 10.17632/2g9nkcdj53.1, https://data.mendeley.com/datasets/2g9nkcdj53
Dataset
Projects
- 2 Finished
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DIMEBO: Spectral Diversity Metrics for Boreal Forests
Rautiainen, M. (Principal investigator), Kuusinen, N. (Project Member), Juola, J. (Project Member) & Salko, S.-S. (Project Member)
01/09/2019 → 30/06/2022
Project: Academy of Finland: Other research funding
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FREEDLES: From needles to landscapes: a novel approach to scaling forest spectra
Rautiainen, M. (Principal investigator), Hovi, A. (Project Member), Juola, J. (Project Member), Mercier, A. (Project Member), Salko, S.-S. (Project Member), Rönkkö, J. (Project Member), Karlqvist, S. (Project Member) & Schraik, D. (Project Member)
01/05/2018 → 30/04/2024
Project: EU: ERC grants
Equipment
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Spectral lab (i3)
Rautiainen, M. (Manager)
Department of Built EnvironmentFacility/equipment: Facility
Press/Media
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Links between light availability and spectral properties of forest floor in European forests
Schraik, D.
10/05/2023
1 item of Media coverage
Press/Media: Media appearance