Ecology of Freshwater and Estuarine Wetlands by Darold P. Batzer & Rebecca R. Sharitz

Author:Darold P. Batzer & Rebecca R. Sharitz
Language: eng
Format: epub
ISBN: 9780520278585
Publisher: University of California Press

FIGURE 7.10. Multiple roles of aromatic substances in carbon cycling in wetlands. Phenol oxidase activity is thought to be an “enzymatic latch” over carbon storage in peatlands because of the widespread negative effects of polyphenols on decomposition and microbial activity. This enzymatic latch mechanism is of unknown importance in other types of wetlands. Other aromatic compounds, e.g., quinones, are important organic terminal electron acceptors. As with other electron acceptors, they cause preferential anaerobic mineralization to carbon dioxide versus methane. Enzymatic latch mechanisms are shown in green, organic terminal electron acceptor mechanisms are shown in blue, controls over both mechanisms are shown in pink, and generalized microbial controls are uncolored. Extensively adapted from Freeman et al. (2012).

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