Megafauna of Vestbrona Carbonate Field and surrounding benthos from seafloor mosaics

Melina Sinner; Arunima Sen

doi:10.15468/5vrbbj

Megafauna of Vestbrona Carbonate Field and surrounding benthos from seafloor mosaics

Citation

Sinner M, Sen A, Hong W L, Michel L, Vadakkepuliyambatta S, Knies J (2023). Megafauna of Vestbrona Carbonate Field and surrounding benthos from seafloor mosaics. Version 1.0. The University Centre in Svalbard. Samplingevent dataset. https://ipt.gbif.no/resource?r=vestbrona_carbonate_field_megafauna_seafloor_mosaics&v=1.0 https://doi.org/10.15468/5vrbbj accessed via GBIF.org on 2024-12-14.

Description

This dataset consists of benthic fauna and features from the Vestbrona Carbonate Field and the adjacent seafloor. The Vestbrona Carbonate Field (VCF) seep site on the Norwegian continental shelf (270 m water depth) was video surveyed with the Remotely Operated Vehicle Ægir 6000 in June 2020. Using extracted images and navigation data, two georeferenced seafloor mosaics were generated and all visible features were enumerated in ArcMap (animals, substrates, litter). Three transects just outside the VCF seep were also surveyed and fauna and seafloor features in those transects were also enumerated. The data were used in Sinner et al. 2023 Frontiers in Earth Sciences 'Lack of detectable chemosynthesis at a sponge dominated subarctic methane seep.'

Sampling Description

Study Extent

Seafloor at the Vestbrona Carbonate Field seep site (Norwegian continental shelf): 2 mosaicked areas of 679.09 sq. m and 562.97 sq. m. Seafloor adjacent to the Vestbrona Carbonate Filed seep site: 3 transects of 129.87 sq. m, 58.06 sq. m and 87.36 sq. m

Sampling

Georeferenced mosaics from the VCF seep site were generated using extracted images from the Ægir 6000 remotely operated vehicle (ROV) with the camera facing downwards (perpendicular to seafloor) through the Agisoft Metashape software. All features were then digitized in ArcMap and numbers and areas were exported from ArcMap. Transects from outside the VCF seep site were based on downwards but slightly forward tilted camera on the ROV, and all features were enumerated from them. Details are in Sinner at al. 2023 Frontiers in Earth Science, 'Lack of detectable chemosynthesis at a sponge dominated subarctic methane seep.'

Method steps

Seafloor video survey with the remotely operated vehicle (ROV) Ægir 6000 using an HD camera Image extraction with ffmpeg. Mosaic construction with Agisoft Metashape Digitization and enumeration of all features in ArcMap Pro.

Taxonomic Coverages

Geographic Coverages

Norwegian continental shelf (approx. 63°N, 6.5°E)

Bibliographic Citations

Sinner M, Hong W L, Michel L, Vadakkepuliyambatta S, Knies J, Sen A (2023) Lack of detectable chemosynthesis at a sponge dominated subarctic methane seep. Frontiers in Earth Science. -

Contacts

Melina Sinner
originator
position: student
University of Southampton, University of Basque Country, University of Liège

Arunima Sen
originator
position: Associate Professor
The University Centre in Svalbard (UNIS), Nord University

Arunima Sen
metadata author
position: Associate Professor
The University Centre in Svalbard (UNIS), Nord University

Melina Sinner
metadata author
position: student
University of Southampton, University of Basque Country, University of Liège

Wei Li Hong
metadata author
position: Associate Professor
Stockholm University

Loïc Michel
metadata author
position: Associate Professor
University of Liège, Ifremer

Sunil Vadakkepuliyambatta
metadata author
position: Scientist
National Centre for Polar and Ocean Research (NCPOR)

Jochen Knies
metadata author
position: Senior Scientist
Geological Survey of Norway (NGU), iC3: The Centre for ice, Cryosphere, Carbon and Climate

Arunima Sen
user
email: arunimas@unis.no

Arunima Sen
administrative point of contact
position: Associate Professor
The University Centre in Svalbard (UNIS), Nord University