Three distinct cladesof cultured heterocystous cyanobacteria constitute the dominantN 2-¢ xingmembersof biological soil crusts oftheColoradoPlateau , USA

constitute the dominantN2-¢xingmembersof biological soil crusts oftheColoradoPlateau,USA Chris M. Yeager, Jennifer L. Kornosky, Rachael E. Morgan, Elizabeth C. Cain, Ferran Garcia-Pichel, David C. Housman, Jayne Belnap & Cheryl R. Kuske Biosciences Division M888, Los Alamos National Laboratory, Los Alamos, New Mexico, USA; School of Life Sciences, Arizona State University, Tempe, Arizona, USA; and Canyonlands Field Station, Biological Resources Division, U.S. Geological Survey, Utah, USA