@misc{indiciaeae730c94cc21,
  title = {Conditional vulnerability of plant diversity to atmospheric nitrogen deposition across the United States},
  author = {Samuel M. Simkin and Edith B. Allen and William D. Bowman and Christopher L. Clark and Jayne Belnap and Matthew L. Brooks and Brian S. Cade and Scott L. Collins and Linda H. Geiser and Frank S. Gilliam and Sarah E. Jovan and Linda H. Pardo and Bethany K. Schulz and Carly J. Stevens and Katharine N. Suding and Heather L. Throop and Donald M. Waller},
  year = {2016},
  doi = {10.1073/pnas.1515241113},
  url = {https://pubs.usgs.gov/publication/70169969},
  note = {Source identifier: 70169969}
}