View Full Document

A Multi-Year Record of Methane Flux at the Mer Bleue Bog, Southern Canada



View the full content.
View Full Document
View Full Document

8 views

Unformatted text preview:

Ecosystems 2011 14 646 657 DOI 10 1007 s10021 011 9435 9 2011 Springer Science Business Media LLC A Multi Year Record of Methane Flux at the Mer Bleue Bog Southern Canada Tim R Moore 1 Allison De Young 1 Jill L Bubier 2 Elyn R Humphreys 3 Peter M Lafleur 4 and Nigel T Roulet1 1 Department of Geography and Global Environmental Climate Change Centre McGill University 805 Sherbrooke St W Montreal Quebec H3A2K6 Canada 2Mount Holyoke College 50 College Street South Hadley Massachusetts 01075 USA 3Department of Geography and Environmental Studies Carleton University Ottawa Ontario K1S 5B6 Canada 4Department of Geography Trent University Peterborough Ontario K9J7B8 Canada ABSTRACT The Mer Bleue peatland is a large ombrotrophic bog with hummock lawn microtopography poor fen sections and beaver ponds at the margin Average growing season May October fluxes of methane CH4 measured in 2002 2003 across the bog ranged from less than 5 mg m 2 d 1 in hummocks to greater than 100 mg m 2 d 1 in lawns and ponds The average position of the water table explained about half of the variation in the season average CH4 fluxes similar to that observed in many other peatlands in Canada and elsewhere The flux varied most when the water table position ranged between 15 and 40 cm To better establish the factors that influence this variability we measured CH4 flux at approximately weekly intervals from May to November for 5 years 2004 2008 at 12 collars representing the water table and vegetation variations typical of the peatland Over the snow free season peat temperature is the dominant correlate and the difference among the collars seasonal average CH4 flux is partially dependent on water table position A third impor tant correlate on CH4 flux is vegetation particularly the presence of Eriophorum vaginatum which increases CH4 flux as well as differences in the potential of the peat profile to produce and consume CH4 under anaerobic and aerobic conditions The combination of peat temperature and



Access the best Study Guides, Lecture Notes and Practice Exams

Loading Unlocking...
Login

Join to view A Multi-Year Record of Methane Flux at the Mer Bleue Bog, Southern Canada and access 3M+ class-specific study document.

or
We will never post anything without your permission.
Don't have an account?
Sign Up

Join to view A Multi-Year Record of Methane Flux at the Mer Bleue Bog, Southern Canada and access 3M+ class-specific study document.

or

By creating an account you agree to our Privacy Policy and Terms Of Use

Already a member?