To determine if nitrogen fixation replaces at least some of the incorporated nitrogen from forage plants into the tissue of lesser snow geese that graze on the tidal flats at La Perouse Bay, Manitoba (58° 04’ N, 94° 03’ W), acetylene-reduction technique was used to measure nitrogenase activity of surface sediments of a subarctic salt marsh. Nitrogenase activity was measured on two grazed and ungrazed sites. The first ungrazed site was excluded from grazing for four years and the second site has not been grazed for three years.
Citations and enhanced abstracts for journals articles and documents focused on rangeland ecology and management. RSIS is a collaboration between Montana State University, University of Idaho, and University of Wyoming.