Paradoxes of Poweshiek Skipperling (Oarisma poweshiek) (Lepidoptera: Hesperiidae): Abundance Patterns and Management of a Highly Imperiled Prairie Species
Figure 1
Mean and median O. poweshiek relative abundance (individuals per km per unit survey) and percent unit surveys with the species found, by management type. For chi-square goodness of fit tests comparing O. poweshiek distribution among management types, expected values in each management type are calculated proportional to distance surveyed in each category. (a) In all unit surveys, as analyzed in A. B. Swengel and S. R. Swengel [17] where only the means were presented (chi-square = 45.9 and ), (b) in peak vegetation (chi-square = 99.3 and ), and (c) in secondary vegetation (chi-square = 257.8 and ).
