Colorado Bat Matrix Methods

We ranked the scope, severity and immediacy (modified from Master et al. 2009) of 20 potential threats as high, moderate, low or insignificant for 18 bat species found in Colorado. We defined:

Scope: The proportion of the species’ population that is observed, inferred, or suspected to be directly or indirectly affected by the threat within Colorado.

Severity: How badly and irreversibly the impacted population may be directly or indirectly affected by the threat within Colorado.

Immediacy: Imminence of the threat to the species within Colorado.

These rankings were summarized into a value ranging from “A” (substantial, imminent threat) to “H” (unthreatened) for each threat-species combination.

threat methods chart

 

Reference

Master, L. L., D. Faber-Langendoen, R. Bittman, G. A. Hammerson, B. Heidel, L. Ramsay, and A. Tomaino. 2009. NatureServe Conservation Status Factors. NatureServe, Arlington, Virginia, U.S.A.