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. 2018 Mar 20;13(3):e0192870. doi: 10.1371/journal.pone.0192870

Fig 2. Heat map showing annual changes in abundance of P. ochraceus for each site relative to the long-term mean.

Fig 2

The annual relative population size was calculated by dividing the total number of adult P. ochraceus (>30 mm radius) counted within long-term permanent plots for a given year (or mean count in years with >1 survey year-1) by the long-term annual mean number of stars counted at a given site through 2013. 2013 is indicated by a vertical line, and separates pre-SSWD years from post-SSWD years. Unshaded cells represent years when surveys were not done.