Table 1. Hypothesized relationships between estimates of primary productivity (NDVI) and the local presence of the giant kangaroo rat.

Candidate Predictors	Hypothesized Mechanism
Maximum NDVIT1,T0	Estimate of primary productivity, a bottom-up limitation on GKR presence (with potential one year lag)
Minimum NDVIT0	Proxy for GKR presence in previous year
NDVI slope during plant senescenceT0	Proxy for GKR presence in previous year (GKR remove vegetation more quickly than it senesces)

T1 represents the Normalized Difference Vegetation Index data from the same year as the rat distribution was estimated; T0 is data from the previous year.