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Particle Size Distribution and 13C Content of Dissolved Organic Matter in a Salt Marsh

By
John A. Calder
John A. Calder
Department of Oceanography Florida State University Tallahassee, Florida 32306
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Fie Kearsley
Fie Kearsley
Department of Oceanography Florida State University Tallahassee, Florida 32306
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Published:
January 01, 1977

Abstract

The dissolved organic carbon (DOC) in a stream flowing through a Florida coastal salt marsh, populated by Spartina and Juncus, undergoes continuous modification as it .is transported over the salinity gradient. High molecular weight organics of terrestrial origin are lost from the dissolved fraction at mid-salinity and large quantities of low molecular weight (less than T 1,000 MW) dissolved organics are- added to the water. The water leaving the salt marsh contains about the same concentration of total DOC as the water entering the marsh, but the effluent waters contain a much greater proportion of low molecular weight material. This material may have greater biological activity than the high molecular weight material that it replaced, and therefore be.an important input to the estuarine food chain. The implications of the changing composition for processes of peat accumulation are noted.

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Contents

GSA Microform Publications

Interdisciplinary Studies of Peat and Coal Origins

P. H. Given
P. H. Given
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A. D. Cohen
A. D. Cohen
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Geological Society of America
Volume
7
ISBN electronic:
9780813759074
Publication date:
January 01, 1977

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