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- Title
A mesocosm study of the effect of restoration on methane (CH) emissions from blanket peat.
- Authors
Green, Sophie; Baird, Andy; Boardman, Carl; Gauci, Vincent
- Abstract
In a mesocosm study, we investigated the effect of different restoration methods on methane (CH) emissions from, and the global warming potential (GWP) of, blanket peat. The controlled laboratory study involved two distinct components: Experiment 1 focused on greenhouse gas exchanges from blocked drains (grips) and evaluated the effects of restoration method, water-level dynamics and climate on CH emissions and GWP. Experiment 2 assessed the role of plant functional type (PFT) on CH emissions from restored peat outside of the grip. A nine month meteorological simulation (April-December) was completed, testing five hypotheses across the two experiments. We found that the method of grip blocking/damming does make a difference with respect to CH emissions and GWP. Of the methods considered, damming with no infill between the dams is preferred to either of the methods involving infilling (heather bale and re-profiling). GWP of all within-grip restoration outcomes was positive (i.e., indicating a net warming effect), and was not influenced by climate or water-level regime. PFT influences CH emissions but not GWP in restored blanket bog. When considering radiative forcing, this finding suggests that it does not matter which PFT dominates a restored area. It is noted that the laboratory findings are, in some senses, preliminary because the experiments consider only a relatively short period immediately after restoration.
- Subjects
PEAT; METHANE &; the environment; WETLAND restoration; GLOBAL warming; WATER levels; GREENHOUSE gases; RADIATIVE forcing
- Publication
Wetlands Ecology & Management, 2014, Vol 22, Issue 5, p523
- ISSN
0923-4861
- Publication type
Article
- DOI
10.1007/s11273-014-9349-3