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Dear All, As many of you may know, methane is lost from peatland soils via various mechanisms including plant-mediated transport. In some cases plant-mediated transport is active, in others purely passive (i.e. via diffusion). I am trying to find out if active transport occurs in Eriophorum angustifolium and Rhynchospora alba. I haven't been able to find any papers dealing with the latter. Of the papers dealing with the former, the *suggestion* is that transport is passive/diffusive but I haven't seen clear evidence that demonstrates unequivocally that this is so. I'd be most grateful if any of you could shed light on this matter. Best wishes, Andy Baird. -- Andrew J. Baird Professor of Physical Geography Department of Geography Queen Mary, University of London Mile End London E1 4NS email: [log in to unmask] ***Note new London 'phone number*** tel.: +44 (0)20 7882 2779 OR +44 (0)1733 254138; fax.: +44 (0)20 8981 6276 web page: http://www.geog.qmul.ac.uk/staff/baird.html ******** Research areas: physical processes (water and heat transfer) in wetland soils; methane dynamics in peat soils; ecohydrological linkages in northern peatlands; environmental modelling. ********