PLANTS {blender}

USGS PLANTS database data

Description

This data set includes county-level occupancy for native and exotic plants in 47 US states

Usage

data(PLANTS)

Format

List containing a data.frame for the native species in each state and a second data.frame for the exotic species in each state. Each data frame is organized with counties as columns and species as rows.

Details

Per the USDA PLANTS Database website, species were listed as "native" if their L48 native status was listed as N, N?, NI, or NI? and "exotic" if their L48 native status was listed as GP, GP?, I, I?, N?I, W, or W?. See http://plants.usda.gov/about_adv_search.html for descriptions of these terms.

The USDA PLANTS Database does not include county-level data on Alaska or Maryland. Hawaii was excluded from this data set because L48 native status did not apply to it.

Source

The USDA PLANTS Database can be found at http://plants.usda.gov/

References

USDA, NRCS. 2010. The PLANTS Database (http://plants.usda.gov, November 23, 2010). National Plant Data Center, Baton Rouge, LA 70874-4490 USA.

Used as an example in Harris et al. 2011. "Occupancy is nine-tenths of the law" The American Naturalist.