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Full-Text Articles in Life Sciences
Fossil And Contemporary Aerosol Particulate Organic Carbon In The Eastern United States: Implications For Deposition And Inputs To Watersheds, As Wozniak, Je Bauer, Rm Dickhut
Fossil And Contemporary Aerosol Particulate Organic Carbon In The Eastern United States: Implications For Deposition And Inputs To Watersheds, As Wozniak, Je Bauer, Rm Dickhut
VIMS Articles
Atmospheric particulate matter samples were collected from mid-Atlantic and northeastern U. S. (Virginia and New York, respectively) sites to assess the fossil versus contemporary sources contributing to aerosol organic carbon (OC) and the implications for its deposition to watersheds. Mean particulate matter total OC (TOC) deposition rates (wet + dry deposition) were calculated to be 1.6 and 2.4 mg C m(-2) d(-1) for the Virginia and New York sites, respectively. Wet deposition of particulate TOC was determined to be the dominant depositional mode, accounting for >65% (Virginia) and >80% (New York) of total aerosol TOC deposition. Isotopic mass balances suggest …
Carbon And Nitrogen Dynamics In Shallow Photic Systems: Interactions Between Macroalgae, Microalgae, And Bacteria, Ak Hardison, Iris C. Anderson, Elizabeth A. Canuel, Cr Tobias, B Veuger
Carbon And Nitrogen Dynamics In Shallow Photic Systems: Interactions Between Macroalgae, Microalgae, And Bacteria, Ak Hardison, Iris C. Anderson, Elizabeth A. Canuel, Cr Tobias, B Veuger
VIMS Articles
We tracked carbon (C) and nitrogen (N) uptake into sediments in the presence and absence of benthic macroalgae using dual stable isotope tracers in combination with compound-specific isotope analyses of hydrolyzable amino acids and phospholipid-linked fatty acids to quantify the uptake and retention of C and N within bulk sediments, benthic microalgae (BMA), and heterotrophic bacteria. Stable isotope tracers (as (15)NH(4)(+) and H(13)CO(3)(-)) were added to mesocosms either via the surface water or pore water for the first 14 d of the 42-d experiment. Macroalgae and sediments exposed to ambient light and dark cycles rapidly took up label from both …