Impacts of climate change on red king crab larval advection in Bristol Bay: implications for recruitment variability: Habitat map data files

• Main Authors: Daly, Benjamin, Hinckley, Sarah
• Format: Dataset
• Language: English
• Published: Axiom Data Science 2020
• Subjects: Bering Sea; Paralithodes camtschaticus; Red king crab; Alaska
• Online Access: https://dx.doi.org/10.24431/rw1k44o; https://search.dataone.org/#view/10.24431/rw1k44o

We refined a suite of hydrodynamic and individual-based models to understand how climate change may impact red king crab (Paralithodes camtschaticus) recruitment in Bristol Bay, Alaska. We coupled a biophysical individual-based model (IBM) and a Regional Ocean Modeling System (ROMS) circulation model to estimate connectivity between the location of red king crab larval release and benthic settlement location in the eastern Bering Sea including Bristol Bay. We conducted ROMS hindcasts for two representative years: 1999 (cold) and 2005 (warm), and a forecast for a predicted warm year: 2037. Scientific output includes ROMS model files, IBM data files, and a red king crab habitat map. Data for each habitat sample used to qualify habitat type and definitions of habitat type is included in the “Habitat Data File” folder. Data for the habitat map were divided into physical (sediments, rocks, and shells) and biological (epibenthos) categories using various data sources including published and unpublished digital data, paper data sheets, and cruise logbooks. Each location in the habitat database was assigned to a cell of the habitat grid, and each cell was then classified as good habitat or bad habitat. Cells containing both good and bad habitat were classified as good habitat, while cells in the grid containing no samples were classified as unknown habitat. The “Connectivity Zones”, “Habitat Grid”, and “Habitat Map” folders contain ArcMap shape files for the habitat map grid, habitat type designations within the grid, connectivity zones, and images of the habitat map. The grid for the habitat information had a cell size of 37 km x 37 km. The ROMS grid used for the circulation model was too finely-divided (2 km x 2 km) for the scale of the habitat data; however, the habitat grid was based on a regularized version of the ROMS grid. The connectivity grid of polygons (“zones”) of various shapes and sizes was assembled to quantify rates of connectivity and retention in areas of interest.