Carbon isotope ratios of organic compound fractions in oceanic suspended particles
Druffel, Ellen R. M.
MetadataShow full item record
To study cycling of organic fractions in the ocean, relative abundances and radio- and stable-carbon isotope measurements of total lipid extract, acid-soluble, and acid-insoluble fractions of suspended particulate organic carbon (POC) were made. Changes in relative abundances occurred mostly in the upper 1000 m of the water column, with a decrease in total lipid extract and the acid-soluble fraction and an increase in the acid-insoluble fraction with increasing depth. We found lower Δ14C values for total lipid extract and the acid-insoluble fraction than for the acid-soluble fraction, which is consistent with the previous suggestion of incorporation of dissolved organic carbon and/or resuspended sediment to POC (Druffel and Williams, 1990; Sherrell et al., 1998). The Δ14C values of these fractions in a given organic carbon pool must be understood in terms of acquisition of 14C-depleted carbon from other carbon pools in addition to aging within the reservoir.
Author Posting. © American Geophysical Union, 2006. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 33 (2006): L23610, doi:10.1029/2006GL027928.
Showing items related by title, author, creator and subject.
Carbon and nitrogen isotope fractionation of amino acids in an avian marine predator, the gentoo penguin (Pygoscelis papua) McMahon, Kelton W.; Polito, Michael J.; Abel, Stephanie; McCarthy, Matthew D.; Thorrold, Simon R. (John Wiley & Sons, 2015-02-25)Compound-specific stable isotope analysis (CSIA) of amino acids (AA) has rapidly become a powerful tool in studies of food web architecture, resource use, and biogeochemical cycling. However, applications to avian ecology ...
Carbon isotope fractionation during aerobic biodegradation of trichloroethene by Burkholderia cepacia G4: a tool to map degradation mechanisms Barth, Johannes A. C.; Slater, Greg F.; Schuth, Christoph; Bill, Markus; Downey, Angela; Larkin, Mike; Kalin, Robert M. (American Society for Microbiology, 2002-04)The strain Burkholderia cepacia G4 aerobically mineralized trichloroethene (TCE) to CO2 over a time period of ~20 h. Three biodegradation experiments were conducted with different bacterial optical densities at 540 nm ...
McNichol, Ann P. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1986-09)A study of the remineralization of organic carbon was conducted in the organic-rich sediments of Buzzards Bay, MA. Major processes affecting the carbon chemistry in sediments are reflected by changes in the stable carbon ...