Key Processes in CH4 dynamics in wetlands and possible shifts with climate change

Hojeong Kang, Inyoung Jang, Sunghyun Kim

Research output: Chapter in Book/Report/Conference proceedingChapter

4 Citations (Scopus)

Abstract

Wetlands are a substantial source of CH 4 production due to emissions during anaerobic conditions in inundated sediments. Knowledge of the factors that affect CH 4 flux in wetlands is very important in estimating CH 4 dynamics and predicting future changes in global climate. This paper reviews approaches for the estimation of the controlling variables of CH 4 dynamics in wetlands. CH 4 emissions from wetlands are mainly dependent on the combined effects of temperature, water level, carbon supply, and presence/productivity of vegetation. Changes in temperature affect CH 4 emission not only by a direct in fluence on methanogens but also by modifying the quantity of carbon substrates from primary production and organic matter decomposition. Water level fluctuation is another key factor affecting CH 4 flux, which can modify methane dynamics by inhibiting or activating methanogens as well as methanotrophic bacteria. Vegetation functions as a conduit for CH 4 release and a key carbon supplier for methanogens. Global climate change is expected to modify all of these factors in addition to contributing directly to CO 2 emission and fertilization effects. The consequences of any changes in CO 2 emission level from wetlands would be additional shifts in the amount and regional distribution of CH 4 emissions from wetlands.

Original languageEnglish
Title of host publicationGlobal Change and the Function and Distribution of Wetlands
PublisherSpringer Netherlands
Pages99-114
Number of pages16
ISBN (Electronic)9789400744943
ISBN (Print)9789400744936
DOIs
Publication statusPublished - 2012 Jan 1

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All Science Journal Classification (ASJC) codes

  • Agricultural and Biological Sciences(all)
  • Environmental Science(all)

Cite this

Kang, H., Jang, I., & Kim, S. (2012). Key Processes in CH4 dynamics in wetlands and possible shifts with climate change. In Global Change and the Function and Distribution of Wetlands (pp. 99-114). Springer Netherlands. https://doi.org/10.1007/978-94-007-4494-3_3