Explanations for nitrogen decline-Response

Affiliations

• ¹ Center for Global Discovery and Conservation Science, Arizona State University, Tempe, AZ 85287, USA.
• ² Jonah Ventures, Boulder, CO 80301, USA.
• ³ US Department of Agriculture Forest Service Northern Research Station, Durham, NH 03824, USA.
• ⁴ Earth and Life Institute, Université Catholique de Louvain, Louvain-la-Neuve, Belgium.
• ⁵ Earth Systems Research Center, University of New Hampshire, Durham, NH 03824, USA.
• ⁶ City University of New York Advanced Science Research Center at the Graduate Center, New York, NY 10031, USA.
• ⁷ Cary Institute of Ecosystem Studies, Millbrook, NY 12545, USA.
• ⁸ Department of Earth and Environment, Boston University, Boston, MA 02215, USA.
• ⁹ Department of Biology, Boston University, Boston, MA 02215, USA.
• ¹⁰ US Department of Agriculture, Agricultural Research Service, Fort Keogh Livestock and Range Research Laboratory, Miles City, MT 59301, USA.
• ¹¹ US Department of Agriculture Agricultural Research Service, Southeast Area, Raleigh, NC 27695, USA.
• ¹² Department of Forest Resources, University of Minnesota, St. Paul, MN 55108, USA.
• ¹³ Institute for Global Change Biology and School for Environment and Sustainability, University of Michigan, Ann Arbor, MI 48109, USA.
• ¹⁴ Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW, Australia.
• ¹⁵ Appalachian Laboratory, University of Maryland Center for Environmental Science, Frostburg, MD 21532, USA.
• ¹⁶ National Socio-Environmental Synthesis Center, Annapolis, MD 21401, USA.