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| BULK CHEMICAL CHARACTERISTICS OF DISSOLVED ORGANIC-MATTER IN THE OCEAN |
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| Author(s): BENNER R, PAKULSKI JD, MCCARTHY M, HEDGES JI, HATCHER PG |
| Source: SCIENCE Volume: 255 Issue: 5051 Pages: 1561-1564 Published: MAR 20 1992 |
| Times Cited: 415 References: 28 |
| Abstract: Dissolved organic matter (DOM) is the largest reservoir of reduced carbon in the oceans. The nature of DOM is poorly understood, in part, because it has been difficult to isolate sufficient amounts of representative material for analysis. Tangential-flow ultrafiltration was shown to recover milligram amounts of > 1000 daltons of DOM from seawater collected at three depths in the North Pacific Ocean. These isolates represented 22 to 33 percent of the total DOM and included essentially all colloidal material. The elemental, carbohydrate, and carbon-type (by C-13 nuclear magnetic resonance) compositions of the isolates indicated that the relative abundance of polysaccharides was high (approximately 50 percent) in surface water and decreased to approximately 25 percent in deeper samples. Polysaccharides thus appear to be more abundant and reactive components of seawater DOM than has been recognized. |
| Document Type: Article |
| Language: English |
| Reprint Address: BENNER, R (reprint author), UNIV TEXAS, INST MARINE SCI, PORT ARANSAS, TX 78373 USA |
Addresses:
1. UNIV WASHINGTON, SCH OCEANOG, SEATTLE, WA 98195 USA
2. PENN STATE UNIV, FUEL SCI PROGRAM, UNIV PK, PA 16802 USA |
| Publisher: AMER ASSOC ADVANCEMENT SCIENCE, 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 |
| Subject Category: Multidisciplinary Sciences |
| IDS Number: HJ809 |
| ISSN: 0036-8075 |
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| | | | | | | | | Record from Web of Science® | | | | | | | | | |