Abstract

Wetland ecosystems throughout the world have stored carbon in organic soils since the earliest geological record, and particularly since the last glacial retreat 10,000 or more years ago. Evidence suggests now, however, that widespread clearing and draining of organic soils, principally for agricultural production, may be causing oxidation of enough carbon to add significantly to the rise of CO/sub 2/ in the atmosphere. This paper will assess the available data on the world's wet organic soils in relation to the global carbon cycle and estimate the consequences of drainage for the global carbon exchange of these soils.

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