TY  - RPRT
TI  - Ecology and the ratchet of events: climate variability, niche dimensions, and species distributions
AU  - Stephen T. Jackson
AU  - Julio L. Betancourt
AU  - Robert K. Booth
AU  - Stephen T. Gray
PY  - 2009
UR  - https://pubs.usgs.gov/publication/70004001
ID  - 70004001
ER  -