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Soil is a significant natural resource composed of organic and inorganic material. Nitrogen, one of the essential elements, is traditionally measured using laboratory methods. The development of hyperspectral imaging enables the cost-effective acquisition of both spectral and spatial information for detecting physical, chemical, and biological attributes of the soil samples. The presented work evaluates the suitability of airborne hyperspectral imaging for determining soil nitrogen content and producing a soil nitrogen map on a pixel-wise basis. The measurement of spatial variability of the soil nitrogen content was taken at two fields located at Rudice, in northeast Brno, Czech Republic, using laboratory methods and a handheld spectrometer. The soil reflectance was also recorded using airborne-mounted imaging spectroscopy sensors. A partial least squares regression was used to develop a model for the calibration of the data collected with a portable spectrometer and to predict the total nitrogen in the soils based on hyperspectral images from airborne sensors. The determination factor for the PLSR model presented in this paper reached an R2 of 0.44. The model’s performance could be improved by using a handheld spectrometer with a wider spectral range, using the same acquisition period for field data collection and hyperspectral imaging, and enlarging the sample size.
Vilém Pechanec; Alexander Mráz; Ladislav Rozkošný; Pavel Vyvlečka. Usage of Airborne Hyperspectral Imaging Data for Identifying Spatial Variability of Soil Nitrogen Content. ISPRS International Journal of Geo-Information 2021, 10, 355 .
AMA StyleVilém Pechanec, Alexander Mráz, Ladislav Rozkošný, Pavel Vyvlečka. Usage of Airborne Hyperspectral Imaging Data for Identifying Spatial Variability of Soil Nitrogen Content. ISPRS International Journal of Geo-Information. 2021; 10 (6):355.
Chicago/Turabian StyleVilém Pechanec; Alexander Mráz; Ladislav Rozkošný; Pavel Vyvlečka. 2021. "Usage of Airborne Hyperspectral Imaging Data for Identifying Spatial Variability of Soil Nitrogen Content." ISPRS International Journal of Geo-Information 10, no. 6: 355.
Floodplain forests are considered important forest ecosystems, and providers of ecosystem functions and services. The subject of this research was to assess the level of provision of five selected ecosystem functions (climate regulation and regulation of short water cycle, biomass production, oxygen production, and carbon sequestration) and biodiversity by relevant groups of forest habitats, and their mutual comparison. Assessment of ecosystem functions was performed in biophysical units based on published data, our own research, and expert knowledge. The results showed the high importance of floodplain forests. In the majority of the services that were studied, this habitat reached high values and, in comparison with the other habitats, took one of the leading positions. When comparing the ranking in the provision of individual ecosystem functions per unit area, the best-assessed habitat in all assessed functions was floodplain and wetland forests, followed by ravine forests and beech forests, but the analysis of the rate of ecosystem function provision, related to the total area of interest, showed a different order of values. Understanding the context of the individual ecosystem functions of natural ecosystems and those close to nature, in comparison with anthropogenically altered ecosystems is a suggested route for ecologically and economically balanced landscape decision-making, which may increase the efficiency of nature and landscape protection.
Vilém Pechanec; Ivo Machar; Helena Kilianová; Pavel Vyvlečka; Josef Seják; Jan Pokorný; Lenka Štěrbová; Marcela Prokopová; Pavel Cudlín. Ranking the Key Forest Habitats in Ecosystem Function Provision: Case Study from Morava River Basin. Forests 2021, 12, 138 .
AMA StyleVilém Pechanec, Ivo Machar, Helena Kilianová, Pavel Vyvlečka, Josef Seják, Jan Pokorný, Lenka Štěrbová, Marcela Prokopová, Pavel Cudlín. Ranking the Key Forest Habitats in Ecosystem Function Provision: Case Study from Morava River Basin. Forests. 2021; 12 (2):138.
Chicago/Turabian StyleVilém Pechanec; Ivo Machar; Helena Kilianová; Pavel Vyvlečka; Josef Seják; Jan Pokorný; Lenka Štěrbová; Marcela Prokopová; Pavel Cudlín. 2021. "Ranking the Key Forest Habitats in Ecosystem Function Provision: Case Study from Morava River Basin." Forests 12, no. 2: 138.