A reflectance model for remote sensing

Article Abstract:

A reflectance model for remote sensing has been developed based on biooptical properties of the marine diazotrophic cyanobacteria Trichodesmium spp. A standard remote-sensing reflectance model was parameterized using measured values of Trichodesmium optical properties. That was the spectral dependence of the chlorophyll-specific optical absorption cross-sections and the spectral dependence of the chlorophyll-specific backscatter cross-sections. Results show the contribution of nitrogen fixation to global biogeochemical processes and the potential for using remote-sensing methods in estimating nitrogen fixation.

Somalia, Usage, Physiological aspects, Mathematical models, Cyanobacteria, Biophysics, Oceanographic research, Nitrogen-fixing microorganisms, Arabian Sea

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Effects of water velocity on algal carbon isotope ratios: implications for river food web studies

Article Abstract:

The implications of the effects of water velocity on algal carbon isotope ratios for river food web studies are discussed. The effect of carbon dioxide supply on microalgal carbon isotope ratios was studied near the forested headwaters of the South Fork Eel River in Mendocino County, CA, and variation of carbon dioxide supply to benthic algae in sites was inferred from measurement of current velocity above the substrate.

Statistical Data Included, Carbon dioxide, Stream ecology, Herbivores

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Microbiological mediation of spectral reflectance from intertidal cohesive sediments

Article Abstract:

Knowledge of the ecology and behavior of the microphytobenthos in intertidal mudflat systems, especially of cyclic migration patterns, is needed to correctly interpret spectral reflectance data. Ground truthing of pigment-related signals should be performed to ensure accurate data interpretation. Optical properties of the sediment surface are affected by the migration of cells to the surface.

Estuarine sediments, Reflectance, Intertidal zonation, Intertidal areas

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