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Showing 1 to 9 of 9 for “"delta13C"”.
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Unifying ecosystem concepts and mercury biomagnification in an estuarine environment using stable isotopes (delta-carbon-13 and delta nitrogen-15).
… positions of organisms (delta15N). Values of delta13C and delta15N were obtained for sediments, suspended particulate matter (SPM), plants, and animals found in the Miramichi River Estuary (New Brunswick, Canada) and used to show the relationship between food web structure and patterns of …
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Influence of Aridity and Fire on Holocene Vegetational Patterns in the Tallgrass Prairie Peninsula
Because of limitations inherent in delta13C analysis of substrates such as charcoal, new techniques are needed to understand C 3 and C4 grass fluctuations. A method of isolating fossil grass pollen for delta13C analysis was developed, and the delta 13C composition of modern and fossil grass pollen …
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Isotopic constraints on sources and cycling of riverine dissolved inorganic carbon in the Amazon Basin
… is typically more supersaturated and depleted in delta13C at high water. In the shields, sandy soils and deforested regions export contemporary inorganic carbon; certain forested clayey soils export aged inorganic carbon.Extensive Andean erosion carries unweathered carbonate sediments into …
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Fossil C 4 plant signals in Southeast Atlantic Ocean continental margin sediments indicate climate-dependent vegetation changes on the adjacent continent
… have significantly higher compound-specific delta13C values, high contents of n-C31 and n-C33 alkanes and the abundance of the n-C32 alkanol. This characteristic of C4 plants was determined by investigating Southwest African continental margin sediments from nine cores on a North to South …
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The geochemistry of carbonate-hosted Pb-Zn-Ag mineralization in the Lavrion District, Attica, Greece: fluid inclusion, stable isotope, and rare earth element studies
… and oxygen isotope compositions of calcite (delta13C = -15.6 to -1.5‰ and delta18O = -9.2 to 17.3‰) intergrown with sulfides reflect variable exchange of the ore-bearing fluid with the Upper and Lower marbles and proximity to the Plaka granodiorite. Post Archean Australian Shale …
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Palaeoclimatology of the late Palaeocene to middle Eocene: geochemical records of stable and transient climate states
… from a section in NE Italy show several other Delta13C perturbations both before and after the PETM event, albeit a quarter to a half of the magnitude of the PETM, and having durations of only 40 { 60 thousand years (kyr). These events are thought to be the result of a re-arrangement of the …
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Evolution and degradation pathways of landfill leachate DOC and detection of groundwater landfill-leachate contamination using compound-specific isotope analysis
… (POC), particulate inorganic carbon (PIC)) and delta13C were used to recognize leachate impact on the surrounding groundwater. (Abstract shortened by UMI.)
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Bycatch and foraging ecology of sea turtles in the Eastern Pacific
… show that spatial patterns in delta15N and delta13C were observed in sea turtle's tissues as correlations with latitude. We also found that loggerhead's signatures differed significantly from green and olive ridleys, especially in terms of delta15N. Loggerheads had higher values of delta15N …
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Trockenheitsreaktionen und holzanatomische Eigenschaften der Zitter-Pappel (Populus tremula L.) – Physiologie und QTL-Mapping
Holz aus Kurzumtriebsplantagen (KUP) mit Pappeln (Populus spp.) kann eine bedeutende Rolle im Mix der Bioenergieressourcen in Deutschland spielen. Trotz eines günstigen Energieinput-Energieoutput-Verhältnisses ist das Erreichen wirtschaftlich zufriedenstellender Ergebnisse mit KUP jedoch auf den …