leaf spectral reflectance

41, 32–40. doi: 10.1007/s00227-011-1658-y. Bull. Spectral analysis was used to find a modified photochemical reflectance index (PRI) of leaves to estimate LUE and thereby estimate leaf Vcmax. Tax calculation will be finalised during checkout. . Use of hedgerows by mammals in an intensive agricultural landscape. At pre-dawn, when temperatures were lower, the PRI was also lower, but darker leaves also had higher PRI than yellow leaves. Ser. (1966). 335, 1–12. Remote Sens. A snow-free vegetation index for improved monitoring of vegetation spring green-up date in deciduous ecosystems. Mar. Some plant growth models require estimates of leaf area and absorbed radiation for simulating evapotranspiration and photosynthesis. Influence of carbon-nitrogen cycle coupling on land model response to CO2 fertilization and climate variability. (2005). Numbers represent salinity treatment values and shaded squares represent 50–70% shade cloth (n = 4). Biol. In contrast, this methodology has had very limited application in quantifying stress responses in seagrasses (Thorhaug et al., 2006). Our objective in this study was to develop spectral indices for prediction of leaf pigment content that are relatively insensitive to species and leaf structure variation and thus could be applied in larger scale remote-sensing studies without extensive calibration. Estuaries Coasts 34, 973–992. Schomer, N. S., and Drew, R. D. (1982). 81, 337–354. As a result, available data and technology are able to shed light on more aspects of plant growth and health. 13, 474–489. Leaf nitrogen effects on the gas exchange characteristics of Chenopodium album (L.) and Amaranthus retroflexus (L.). Ability of the photochemical reflectance index to track light use efficiency for a sub-tropical planted coniferous forest. 84‐48‐J from Dep. An investigation of inversion methodologies to retrieve the leaf area index of corn from C-band SAR data. The relationship of leaf photosynthetic traits – Vcmax and Jmax – to leaf nitrogen, leaf phosphorus, and specific leaf area: a meta-analysis and modeling study. Bot. doi: 10.3354/meps11923, Herbert, D. A., Perry, W. B., Cosby, B. J., and Fourqurean, J. W. (2011). (1988). 0000001622 00000 n Tang, Y. Quantifying photosynthetic capacity and its relationship to leaf nitrogen content for global-scale terrestrial biosphere models. 75, 261–274. Photosynthetica, 44(2), 248-254. doi:10.1007/s11099-006-0015-8, Weng, J. H., Jhaung, L. H., Lin, R. J., & Chen, H. Y. Agricultural and Forest Meteorology, 232, 74–88. Application of Earth Observation Data for Estimation of Changes in Land Trajectories in Varanasi District, India. doi: 10.1007/s12237-011-9388-4, Hochberg, E. J., Atkinson, M. J., Apprill, A., and Andréfouȅt, S. (2004). When plants are exposed to stress—such as high solar or ultraviolet radiation, heat, drought, salt, chilling, heavy metals, air pollutants, mechanical stress, pathogen attack, and nutrient deficiency—there is an increase in accumulation of Reactive oxygen species (ROS). One such mechanism is the xanthophyll cycle, which is known to protect plants from stress caused by chilling, light intensity, drought, heat, senescence, and salinity. All co-authors commented on and approved the final manuscript draft. volume 192, Article number: 788 (2020) 0000008145 00000 n Spectral reflectance [R(λ)] is the fraction (%) of downwelling plane irradiance that reflects upward as a function of wavelength (λ) [R(λ) = Eu(λ)/Ed(λ)]. However, the usefulness of PRI in tracking changes in photosynthesis rate (and PSII) during a whole day or over a season was missing until a decade ago. Water has high absorption and virtually no reflectance in near infrared wavelengths range and beyond. Remote sensing for monitoring and mapping Land Productivity in Italy: A rapid assessment methodology. Integration of Landsat-8 Thermal and Visible-Short Wave Infrared Data for Improving Prediction Accuracy of Forest Leaf Area Index. 0000006686 00000 n A large number of spectral indices have been developed for estimation of leaf pigment content. Estuaries 22, 431–444. Contribution No. Sensitivity analysis of artificial neural network for chlorophyll prediction using hyperspectral data. The presence of other pigments did not significantly affect estimation of chlorophyll from spectral reflectance. Patterns of Arctic Tundra Greenness Based on Spatially Downscaled Solar-Induced Fluorescence. Decadal trends in photosynthetic capacity and leaf area index inferred from satellite remote sensing for global vegetation types. Thus, seedlings physiological health, survival and growth are dependent on the environmental conditions existing during the release of the annual cohorts. “A unified explanation for anthocyanins in leaves?,” in Anthocyanins in Leaves: Advances in Botanical Research, Vol. 0000007656 00000 n Recruitment of Thalassia testudinum seedlings into physically disturbed seagrass beds. Aquat. Copyright © 2017 Durako and Howarth. It was assumed that the Spectralon target is Lambertian (i.e., reflects light equally in all directions). 25, 51–61. Wu, C. Y., Niu, Z., & Tang, Q. Ecol. Variations in water clarity and bottom albedo in Florida Bay from 1985 to 1997. J. Exp. J. Exp. Plant Sci. doi: 10.4319/lo.2003.48.1_part_2.0464, Gamon, J. Environmental Monitoring and Assessment In contrast, significant increases in Fv/Fm in shaded seedlings indicated low-light acclimation. Tree Physiology, 9, 9. Reflectance measurements employed an Ocean Optics USB2000 fiber optic spectrometer coupled to a 400 μm diameter UV-VIS reflection probe (Ocean Optics R400-7-UV-VIS). Incorporation of Unmanned Aerial Vehicle (UAV) Point Cloud Products into Remote Sensing Evapotranspiration Models. A voxel matching method for effective leaf area index estimation in temperate deciduous forests from leaf-on and leaf-off airborne LiDAR data. FIGURE 2. Challenges and Future Perspectives of Multi-/Hyperspectral Thermal Infrared Remote Sensing for Crop Water-Stress Detection: A Review. This species has high light requirements and is considered to be the climax species in marine seagrass systems (Zieman, 1982). 0000004554 00000 n Mapping the cumulative impacts of long-term mining disturbance and progressive rehabilitation on ecosystem services. The photochemical reflectance index: an optical indicator of photosynthetic radiation use efficiency across species, functional types, and nutrient levels. Leaf reflectance was measured using the non-imaging high-resolution spectroradiometer FieldSpec 3 (Analytical Spectral Devices – ASD, Panalytical Company, Boulder, CO, USA) with 350 to 2500 nm spectral range and 3 nm spectral resolution (Full-Width-Half-Maximum - FWHM) at 700 nm, 10 nm FWHM at 1400 nm, and 10 nm FWHM at 2100 nm (ASD 2010). Previous studies indicated that spectral reflectance, absorption of photosynthetically active radiation (PAR), and leaf area index (LAI) are interrelated.

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