Fig 4. Recent adult Acanthaster cf. solaris abundance estimates in the Great Barrier Reef (GBR) based on long-term monitoring data.(A) Individual reefs monitored between 1991 and 2022; (B) Contemporary abundance estimates of adult A. cf. solaris across the GBR (3,054 reefs). For each surveyed reef, individual A. cf. solaris counts were converted into a density estimate (individuals km-2), where mean reef-level density was calculated for each annual sample and a 95% confidence interval of annual mean densities was calculated from 500 pseudo-samples generated by bootstrap for each year. The confidence limits and the mean of the annual mean densities were multiplied by the total surface area of the preferred A. cf. solaris habitat of reef-building corals on the GBR to calculate census population size. Black dots indicate the average abundance, while vertical lines indicate the extent of the 95% confidence intervals of the 500 mean annual values estimated by bootstrap sampling. The blue and red dashed lines represent, respectively, the harmonic means of the 2.5th (6.7 million) and 97.5th percentiles (14.3 million) of mean annual values over 32 years of monitoring. https://geoportal.gbrmpa.gov.au/.
Image published in: Popovic I et al. (2024)
Image downloaded from an Open Access article in PubMed Central. © 2024 Popovic et al
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