Processing and analysis of Arctic Calanus occurrence records from OBIS and GBIF databases ...

• Main Authors: Freer, Jennifer J., Tarling, Geraint A.
• Format: Dataset
• Language: English
• Published: NERC EDS UK Polar Data Centre 2023
• Subjects: "EARTH SCIENCE","BIOSPHERE","ECOLOGICAL DYNAMICS","COMMUNITY DYNAMICS","BIODIVERSITY FUNCTIONS"; "EARTH SCIENCE","OCEANS","MARINE ENVIRONMENT MONITORING"; Arctic; GBIF; OBIS; sampling bias; winter; zooplankton; Arctic Ocean; Calanus finmarchicus; Sea ice; Zooplankton
• Online Access: https://dx.doi.org/10.5285/a5cbfbe1-6fa6-44cf-96fe-db92c32b69d0; https://data.bas.ac.uk/full-record.php?id=GB/NERC/BAS/PDC/01723

This dataset contains quality-controlled georeferenced occurrence records of three Arctic Calanus species (Calanus finmarchicus, C. glacialis and C. hyperboreus), downloaded from the Ocean Biodiversity Information System (OBIS) and the Global Biodiversity Information Facility (GBIF) databases. Records span about 150 years of sampling (1870-2017), are located between 30 and 90 degrees north, and are distributed between the surface and 5000m deep. Physical (bathymetry) and environmental (temperature and sea-ice concentration) parameters are matched to each occurrence record. An html file provides the annotated source code for the data processing, analyses and figures produced for the publication: Freer JJ and Tarling GA (2023) Assessing key influences on the distribution and life-history of Arctic and boreal Calanus: Are online databases up to the challenge? Front. Mar. Sci. 10:908112. This work was funded by DIAPOD (NE/P006213/1) and CHASE (NE/R012687/1) projects as part of the Changing Arctic Ocean ... : Data from OBIS were accessed on 12-01-2023 and data from GBIF were accessed on 13-01-2023. To maintain consistency, all encounters were treated as presence only, i.e. no weighting was given to records with information on abundance, biomass or number of individuals and no absence records were included. Raw downloaded data and the contributing dataset citations are provided for both databases (see Section "Related datasets"). Subsequent data processing and cleaning steps are outlined in section "Quality". All cleaned records, regardless of dataset origin, were matched to seafloor bathymetry using a 0.25 x 0.25 decimal degree resolution raster grid (Becker et al., 2009). Cleaned records from OBIS had fields for maximum and minimum collection depth. These data were matched to vertically resolved temperature data from the 2018 World Ocean Atlas (Locarnini et al., 2018) and seasonal sea-ice concentration data from the National Snow and Ice Data Centre (Walsh et al., 2019). Both temperature and sea ice grids had a ...