Harpy Eagle climate change SDMs

Climate change is expected to have a profound impact on species distributions, contracting suitable climate space. Biodiversity areas are important to mitigate these negative effects but are static by design and thus do not account for future projections of species distributions. The Harpy Eagle <i>Harpia harpyja</i> has a broad range across lowland Neotropical forests and thus its distribution could be negatively affected by climate change when combined with current rates of habitat loss. To test this hypothesis, we use spatial point process models fitted with climatic, topographic, and landcover covariates to identify current distribution. We then project to 24 future climate scenarios, using three General Circulation Models (GCMs), and two emission scenarios between the years 2021 and 2100 averaged over four 20-year periods. Our current model identified a core range across Amazonia and the Guiana Shield, with evergreen forest (71 %), mean diurnal temperature range (13 %), and elevation (6 %) the most important predictors.<b> </b>Reclassifying the current model to a binary prediction estimated a range size of ~7.6 million km², with the Important Bird and Biodiversity Area (IBA) network covering 18 % of habitat (~1.4 million km²) within this range. By 2090, range size was predicted to decrease on average by 14.4 % under a higher emissions scenario, and 7.3 % under a lower emissions scenario. The IBA network would cover 14 % less area under a higher emissions scenario, and 3.3 % less distribution area under a lower emissions scenario by 2090. Southern Amazonia is predicted to have the greatest reduction in range size and subsequently highest loss of Harpy Eagle habitat within the IBA network. Our work demonstrates that the combination of climate change and subsequent habitat loss may result in substantial losses in distribution for this raptor across the southern edge of its range.<br><br>Data to support publication DOI: Currently in review<br><br>GBIF Occurrence Download: https://doi.org/10.15468/dl.6ikhnj<br>eBird data: Download Data - eBird<br>Data from Miranda et al. 2019: Species distribution modeling reveals strongholds and potential reintroduction areas for the world’s largest eagle (plos.org)