Megafauna density observed using OFOS at the station HAUSGARTEN-I, 2017-2022

• Main Author: Meyer-Kaiser, Kirstin
• Format: Dataset
• Language: English
• Published: PANGAEA 2024
• Subjects: Amphipoda; Anemonia; ARK-XXXI/2; Bathyarca frielei; Bathybiaster vexillifer; Bylgides groenlandicus; Bythocaris leucopis; Cerianthidae; Changing Earth – Sustaining our Future; Colossendeis proboscidea; Elpidia heckeri; epibenthic fauna; Event label; File name; FRAM; FRAM 2022; FRontiers in Arctic marine Monitoring; Gastropoda; GPF 20-1_021; Hausgarten; Helmholtz_ChangingEarth; invertebrates; Jasmineira schaudinni; Liparidae; Long-term Investigation at AWI-Hausgarten off Svalbard; Lycodes squamiventer; Maria S. Merian; megafauna; Mohnia mohni; MSM108; MSM108_14-7; MSM77; MSM77_11-1; North Atlantic Ocean; North Greenland Sea; Nymphon macronyx; Ocean Floor Observation and Bathymetry System; Ocean Floor Observation System; OFOBS; OFOS; Ophiocten gracilis; Polarstern; Pontaster tenuispinus; PS107; PS107_43-12; PS121; PS121_5-9; PS126; PS126_8-13; Sabellidae; Arctic; Greenland; Svalbard; Greenland Sea; North Atlantic; North Greenland
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.967215; https://doi.org/10.1594/PANGAEA.967215

In 2017 - 2022, the Ocean Floor Observation System (OFOS) was used to survey epibenthic megafauna at the station HAUSGARTEN-I (79 N, 6 E, 1300 m depth). Data were collected every year except 2020 over a set transect. Images were collected automatically every 30 seconds, and additional images were collected manually when objects of interest came into view. For analysis, 90 automatically-recorded images were selected, with 30 each from the beginning, middle, and end of the transect. Images were individually viewed using the BIIGLE online image analysis tool, and all megafauna were annotated with identifications at the lowest possible taxonomic level. The area of each image was calculated using three parallel lasers mounted on the OFOS a known distance apart and visible in the images. Data represented here are the densities (individuals m^-2) for each species or morphotype in each image.