Coral resilience mapping in Guam and American Samoa

A underwater landscape of multicolored corals
Corals across the Pacific, like these in Guam, face new challenges with ocean warming and acidification. (Photo: Dave Burdick)

Coral resilience analysis in Guam and American Samoa has yielded a set of GIS layers suitable for producing maps of the region, available at the USGS Science Base site. This dataset consists of raster geotiff outputs of relative environmental favorability for coral growth and survival across 3 climate scenarios: present, intermediate emissions (Representative Concentration Pathway 4.5), and worst case emissions (Representative Concentration Pathway 4.5). These datasets were generated from a synthesis of spatial variability in many environmental conditions, including thermal stress, wave power, irradiance, chlorophyll concentrations, macroalgal cover, calcite concentrations, turbidity, and erosion. Full methods and results are described in detail in the parent manuscript, “Where favorable environmental conditions and resilient corals coincide: Guam and American Samoa” (available in 2022).





Monica Moritsch
Research Ecologist, USGS Western Geographic Science Center