Concentration and molecular weight distribution of dissolved organic carbon in a mangrove creek in the Hinchinbrook area,Australia |
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| Authors: | Mueller Hansrudolf Ayukai Tenshi |
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| Institution: | (1) Schweizerische Alpine Mittelschule Davos, 7270 Davos Platz, Switzerland;(2) Australian Institute of Marine Science, P.M.B. No. 3, Townsville M.C., Queensland, 4810, Australia |
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| Abstract: | The concentration and molecular weight distribution of dissolved organic carbon (DOC) are reported for a mangrove creek in the Hinchinbrook area, Australia. DOC concentration ranged from 1.0 mg Cl–1 near the creek mouth to 2.2mg Cl–1 at the innermost part of the creek. There was no apparent spatial trend in molecular weight distribution of DOC, with a >300gmol–1 fraction accounting for about 70% of the total in all samples. DOC concentration fluctuated between 0.5 and 1.2mg Cl–1 over one tidal cycle. The samples collected at low tide and during the rising tide were dominated by DOC of >300gmol–1 and <300gmol–1, respectively. This suggested the export of high molecular weight DOC, probably originating from litter leachates, and the import of low molecular weight DOC to the creek. |
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| Keywords: | dissolved organic carbon mangrove creek molecular weight |
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