image: A herd of vicuñas, which are a species of wild alpaca, are visible between Steve Schmidt and Preson Sowell (right) and Nevado Chumpi (tall white snowy mountain, right). A bit of the Puca Glacier is visible at Chumpi's base. This material relates to a paper that appeared in the 23 May 2018, issue of Science Advances, published by AAAS. The paper, by J.L. Darcy at University of Colorado, Boulder in Boulder, CO, and colleagues was titled, "Phosphorus, not nitrogen, limits plants and microbial primary producers following glacial retreat." view more
Credit: John L. Darcy