The carbon isotopic composition of any naturally synthesized organic compound depends
on (1) the carbon source utilized,(2) isotope effects associated with assimilation of carbon by …

The stable carbon isotopic composition of organic carbon was measured in 13 species of
marine phytoplankton grown axenically in batch culture under identical conditions. The § 13 …

Reports of the 13C content of marine particulate organic carbon are compiled and on the
basis of GEOSECS data and temperatures, concentrations, and isotopic compositions of …

Carbon isotope analyses of petroleums, modern plant constituents, and other sedimentary
organic materials indicate that the range of C-13/C-12 ratios in organic carbon is about 4.5 …

The total organic carbon in cores of Recent marine sediments has a δ 13 C-range from− 16
to− 28‰ relative to the Chicago PDB-standard. This large range is primarily due to the …

The most abundant biological samples from Redfish Bay, a shallow marine estuary near
Port Aransas, Texas, were collected, and δC 13 for the total carbon, lipid carbon, and protein …

The ocean accounts for over 90% of the active pools of carbon on the Earth's surface, with
over 95% of marine carbon in the form of dissolved inorganic carbon (DIC)(Hedges and Keil …

The carbon isotopic composition of the organic matter in fluvial sediments and in fluvial
suspended matter falls in the range valid for continental organic matter (− 25 to− 28‰). The …

Nier (1939, 1941) and his co-workers originally demonstrated that carbon isotopic variations
exist in nature. Subsequent investigations by Wickman (1951), Craig (1953), and Silverman …

Wickman (1952) and Craig (1953) reported that terrestrial plants are in general enriched in
C-12 relative to marine plants. Craig (1953), Landergren (1954), Silverman and Epstein …