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- W2081903087 abstract "Chesapeake and San Francisco Bays, U.S.A., are both river dominated, temperate estuaries. The organic carbon and nitrogen isotopic compositions of the suspended particles (≥0·4 μm), however, show major differences for nitrogen and minor differences for carbon. In northern San Francisco Bay, the carbon isotope values averaged −26·2±0·2‰ δ13C for suspended particles, and for Chesapeake Bay and the Potomac River, the average was −24·3±3·2‰. The nitrogen isotope ratios (δ15N) of suspended particles in northern San Francisco Bay in late summer were +0·9±0·4‰, probably reflecting a nitrogen component from agricultural runoff. The values for Chesapeake Bay, and its subestuary, the Potomac River averaged +7·7±3·1‰, with the highest values occurring during summer when the primary source of nitrogen originated from remineralized organic material. Carbon and nitrogen isotope values for colloids (≤0·4 μm) were 8·2±1·7 for nitrogen and −26·0±1·6 for carbon (n=17) throughout both estuaries and the Potomac river. Ultrafiltrates, collected after filtration and ultrafiltration, had δ15N values of +7·3±0·3 and δ13C values of −24·5±1·7. The similarity of isotopic values between suspended particles and colloids in winter samples suggested that these colloids were formed by desorption or dissociation from resuspended sediments and soils. Summer colloids in San Francisco Bay were uniformly heavier by 7‰ than suspended particles suggesting that the lighter isotope was selectively utilized by heterotrophs, leaving an isotopically heavy colloid residual." @default.
- W2081903087 created "2016-06-24" @default.
- W2081903087 creator A5000548371 @default.
- W2081903087 creator A5079888863 @default.
- W2081903087 date "2002-04-01" @default.
- W2081903087 modified "2023-10-18" @default.
- W2081903087 title "Carbon and Nitrogen Isotopes in Suspended Particles and Colloids, Chesapeake and San Francisco Estuaries, U.S.A." @default.
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- W2081903087 doi "https://doi.org/10.1006/ecss.2001.0853" @default.
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