Epimegabenthos based on seafloor georeferenced mosaics of the Lofoten-Vesterålen canyon seeps

Occurrence Observation
Dernière version Publié par The University Centre in Svalbard le nov. 3, 2025 The University Centre in Svalbard
Date de publication:
3 novembre 2025
Licence:
CC-BY 4.0

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Description

This dataset consists of all the epimegabenthic fauna marked and enumerated from five seafloor georeferenced image mosaics from two canyons with methane seep conditions on the continental slope off the Lofoten-Vesterålen archipelago of northern Norway. Two of the mosaics are from the inner part of the seep from the southern of the two canyons, one mosaic is from the inner part of the seep from the northern canyon and three mosaics are from the edges of the seep from the northern canyon. Videos of the seafloor were obtained with the the remotely operated vehicle (ROV) Ægir from the research vessel Kronprins Haakon, maintaining an altitude of between 1 and 1.5 m. Images were extracted every 3 seconds via the free software ffmpeg and using the images and their associated navigation data, georeferenced mosaics were generated with Agisoft's Metashape software. The mosaics cover areas betweeen 133 m2 and 400 m2 . The mosaics were inputted into Arc Desktop and using the Editor tool, all fauna were identified, marked and enumerated. All individuals were marked to obtain numbers for each taxon. Colonial or encrusting animals were outlined to obtain areal coverage. Identifications were made to the lowest possible level which was species in many cases, but only phylum in some cases. The faunal data from the two mosaics of inner parts of the seep in the southern canyon were used in the publication by Sen et al. 2019 'Atypical biological features of a new cold seep site on the Lofoten-Vesterålen continental margin (northern Norway) in Scientific Reports. The other mosaics are used in a publication by Sen et al. on communities at the edges of seeps. 

Enregistrements de données

Les données de cette ressource occurrence ont été publiées sous forme d'une Archive Darwin Core (Darwin Core Archive ou DwC-A), le format standard pour partager des données de biodiversité en tant qu'ensemble d'un ou plusieurs tableurs de données. Le tableur de données du cœur de standard (core) contient 57 enregistrements.

Cet IPT archive les données et sert donc de dépôt de données. Les données et métadonnées de la ressource sont disponibles pour téléchargement dans la section téléchargements. Le tableau des versions liste les autres versions de chaque ressource rendues disponibles de façon publique et permet de tracer les modifications apportées à la ressource au fil du temps.

Versions

Le tableau ci-dessous n'affiche que les versions publiées de la ressource accessibles publiquement.

Comment citer

Les chercheurs doivent citer cette ressource comme suit:

Sen A, Sevin B, Kotliarov A, Hong W L, Szymczycha B, Diak M, Lepland A, Knies J (2025). Epimegabenthos based on seafloor georeferenced mosaics of the Lofoten-Vesterålen canyon seeps. Version 1.2. The University Centre in Svalbard. Occurrence dataset. https://ipt.gbif.no/resource?r=epiimegabenthos_lofoten-vesteralen_canyon_seeps&v=1.2

Droits

Les chercheurs doivent respecter la déclaration de droits suivante:

L’éditeur et détenteur des droits de cette ressource est The University Centre in Svalbard. Ce travail est sous licence Creative Commons Attribution (CC-BY) 4.0.

Enregistrement GBIF

Cette ressource a été enregistrée sur le portail GBIF, et possède l'UUID GBIF suivante : 139818b8-f6de-446d-a4e0-32b98c83c0d5.  The University Centre in Svalbard publie cette ressource, et est enregistré dans le GBIF comme éditeur de données avec l'approbation du GBIF Norway.

Mots-clé

Occurrence; Observation

Contacts

Arunima Sen
  • Créateur ●
  • Personne De Contact
  • Associate Professor
The University Centre in Svalbard (UNIS)
Longyearbyen
NO
Brian Sevin
  • Créateur
University of Zagreb
Antonia Kotliarov
  • Créateur
Memorial University of Newfoundland
Wei Li Hong
  • Créateur
Stockholm University
Beata Szymczycha
  • Créateur
Institute of Oceanology Polish Academy of Sciences (IOPAN)
Magdalena Diak
  • Créateur
Institute of Oceanology Polish Academy of Sciences (IOPAN)
Aivo Lepland
  • Créateur
Geological Survey of Norway (NGU)
Jochen Knies
  • Créateur
Norwegian Geological Survey (NGU), iC3: Centre for ice, Cryosphere, Carbon and Climate

Couverture géographique

Methane seep areas within two canyons on the continental slope off Lofoten-Vesterålen (northern Norway)

Enveloppe géographique Sud Ouest [68,157, 10,466], Nord Est [68,168, 10,472]

Données sur le projet

Pas de description disponible

Titre Arctic Submarine Groundwater Discharge (Arctic SGD)
Financement Arctic SGD (Submarine groundwater discharge) project (The Norwegian Financial Mechanism 2014-2021, project number 019/34/H/ ST10/00645 and 2019/34/H/ST10/00504).

Les personnes impliquées dans le projet:

Arunima Sen
  • Propriétaire
Beata Szymczycha
  • Chercheur Principal
Wei Li Hong
  • Propriétaire

Méthodes d'échantillonnage

Using the remotely operated vehicle (ROV) Ægir from the research vessel Kronprins Haakon, video of the seafloor was recorded, maintaining an altitude of about 1-1.5 m. The HD video camera of the ROV was facing directly downwards (perpendicular to the seafloor) for the imaging process. Video acquisition was performed in a lawn-mower pattern, ensuring at least 25% overlap between adjacent lines. Images were extracted from the video every 3 seconds using the free software, ffmpeg. Navigation coordinates for each image were obtained from the ROV's track. These images were stitched together to create a single, composite georeferenced image (mosaic) of the seafloor. For this, structure-from-motion photogrammetry processing was conducted using Agisoft Metashape. Five digital models were constructed in total, each covering hundreds of m². The georeferenced mosaics were imported into ArcMap Desktop and all visible fauna were marked with the Editor tool. Individual organisms were marked as points (point feature class). Colonial or encrusting organisms were outlined to get areal coverages (polygon feature classes). Identification was done to lowest taxonomic level as possible, which was species in some cases, but often reliable identification was limited to higher levels such as genus or family and in certain cases, only phylum level.

Etendue de l'étude Methane seeps in two canyons on the continental slope off Lofoten-Vesterålen (northern Norway)

Description des étapes de la méthode:

  1. Video imaging of the seafloor was conducted via the downward facing HD camera on the ROV. Overlap was maintained between adjacent video lines. Images were extracted from the video every three seconds and in combination with the corresponding navigation data for the images, a single, composite, georeferenced image (mosaic) was created via Agisoft's Metashape software. Five mosaics were generated. The mosaics were inputted into ArcMap Desktop and all visible features and fauna were marked and enumerated.

Métadonnées additionnelles

Identifiants alternatifs 139818b8-f6de-446d-a4e0-32b98c83c0d5
https://ipt.gbif.no/resource?r=epiimegabenthos_lofoten-vesteralen_canyon_seeps