@misc{indiciae613f1cb1adcf,
  title = {Biogeographic affinity helps explain productivity-richness relationships at regional and local scales},
  author = {S. Harrison and J.B. Grace},
  year = {2007},
  doi = {10.1086/519010},
  url = {https://pubs.usgs.gov/publication/70030997},
  note = {Source identifier: 70030997}
}