Comparison of minimum winter temperatures
To document differences in minimum winter temperatures along the
Massachusetts and Connecticut transects, daily minimum temperatures were
extracted from PRISM daily minimum temperature rasters available from
the PRISM Climate Group at http://prism.oregonstate.edu in ArcMap
v. 10.7.1 (Esri Inc., West Redlands, CA) for each trap location along
both transects from December 1st through March
31st from 2007-2018. At each trap, these results were
then averaged to produce a mean of the yearly minimum temperatures
across the twelve-year period. To determine whether there were
differences between trap localities within a transect, and globally
between the two transects, linear regression analyses were performed
with the mean of the minimum temperatures as the response variable and
distance and state as predictor variables in R.