Butterflies had a different pattern in the spring: butterfly abundance declines were only marginally significant (at α = 0.10 level) at an average annual rate of 9.49% attributable to the fixed factor year when controlling for the other variables in the model (spring abundance model, year: (t (df=10) = −1.836, p = 0.0962, Table S5 and Figure 3 ).
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Winter Rains Support Butterfly Diversity, but Summer Monsoon Rainfall Drives Post-Monsoon Butterfly Abundance in the Arid Southwest of the US.
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