The role of atmospheric nitrogen fixation by log mat biofilm in the Spirit Lake ecosystem, Mount St. Helens, WA

Kena Fox-Dobbs1, Alexander Barnes1, Jeremy Davis2, James Gawel2 and Avery Shinneman3, (1)University of Puget Sound, Geology Department, Tacoma, WA, United States, (2)University of Washington Tacoma, Environmental Science, Tacoma, WA, United States, (3)University of Washington Bothell, School of Interdisciplinary Arts and Sciences, Bothell, WA, United States