Stability and composition of terrestrially derived dissolved organic nitrogen in continental shelf surface waters |
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| Authors: | Wayne S Gardner John A Stephens |
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| Institution: | Skidaway Institute of Oceanography, Savannah, Ga. 31406 U.S.A. |
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| Abstract: | A linear decrease in dissolved organic carbon and nitrogen with increasing salinity offshore from the Georgia coast suggests that organic nitrogen compounds contributed to coastal waters by rivers are stable during the period (2–3 months) of their transfer over the continental shelf. While the C/N ratio decreased with distance from shore, total dissolved organic nitrogen (DON), total amino nitrogen, and primary amino nitrogen showed similar relative decreases, suggesting that nitrogen is associated with refractory organic compounds. Measured amino nitrogen accounted for about 20% of the total DON, leaving about 80% of the organic nitrogen undefined. |
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