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Physical and ecological controls on methane release from a boreal peatland in interior Alaska

Dates

Year
2011

Citation

Shea, Kathleen M., 2011, Physical and ecological controls on methane release from a boreal peatland in interior Alaska: University of Guelph (Canada).

Summary

This thesis is an investigation of the biophysical controls on the three modes of methane (CH4 ) release from a boreal peatland: diffusion, plant-mediated transport and ebullition. My objectives were to (1) quantify the total CH4 flux of a permafrost thaw-affected peatland, (2) establish the relative importance of the three modes of CH4 release in these systems, and (3) identify key biotic and abiotic controls on individual transport mechanisms. Results showed that ebullition and plant-mediated transport were the dominant pathways for CH4 release and that traditional approaches for measuring total CH4 flux from peatland soils underestimated total efflux by not capturing ebullition. Further, results from a laboratory experiment indicated [...]

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  • LC MAP - Landscape Conservation Management and Analysis Portal
  • Northwest Boreal Landscape Conservation Cooperative

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