Search results for " photosynthetic pigment"

showing 2 items of 2 documents

Biological and physical modification of carbonate system parameters along the salinity gradient in shallow hypersaline solar salterns in Trapani, Ita…

2017

Abstract We investigated changes in the chemical characteristics of evaporating seawater under the influence of microbial activity by conducting geochemical analyses of the brines and evaporite sediments collected from solar salterns in Trapani, Italy. The microbial activity had a substantial effect on the carbonate system parameters. Dissolved inorganic carbon (DIC) was substantially removed from the brine during the course of evaporation from the seawater to the point where calcium carbonate precipitates, with an accompanying decrease in its carbon isotopic composition (δ 13 C DIC ) to as low as −10.6‰. Although the removal of DIC was due to calcium carbonate precipitation, photosynthesis…

0301 basic medicine010504 meteorology & atmospheric sciencesEvaporiteMineralogyengineering.materialBiogeochemical cycle01 natural sciences03 medical and health scienceschemistry.chemical_compoundMicrobial matGeochemistry and PetrologyCompound-specific isotope analysishemic and lymphatic diseasesDissolved organic carbonPhotosynthetic pigmentSulfate0105 earth and related environmental sciencesHypersaline environmentSalinity030104 developmental biologyCalcium carbonatechemistryBiogeochemical cycle; Carbonate system; Compound-specific isotope analysis; Hypersaline environment; Microbial mat; Photosynthetic pigments;Photosynthetic pigmentsengineeringHaliteCarbonateSeawaterCarbonate systemCompound-specific isotope analysiGeologycirculatory and respiratory physiology
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Seasonal and spatial changes in the sediment organic matter of a semi-enclosed marine system (W-Mediterranean Sea)

1999

The composition of sediment organic matter and the related role of microphytobenthic biomass have been investigated during one-year in a semi-enclosed marine system (Marsala lagoon, Mediterranean Sea). Monthly samples from June 1993 to May 1994 were analysed for carbohydrate, protein, lipid, photosynthetic pigment and total organic matter. The three main biochemical classes of organic compounds (i.e. carbohydrates, proteins and lipids) showed higher concentrations than reported in the literature. However, photosynthetic pigment was quite low, compared to other enclosed marine basins or Mediterranean coastal lagoons. As a result, the contribution of primary organic carbon to the sedimentary …

Settore BIO/07 - Ecologiacarbohydrates proteins lipids photosynthetic pigment sedimentary organic matter lagoon
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