Epimegabenthos based on seafloor georeferenced mosaics of the Hornsundbanken methane seep area

Registro biológico
Última versión publicado por The University Centre in Svalbard el may 12, 2026 The University Centre in Svalbard
Fecha de publicación:
12 de mayo de 2026
Licencia:
CC-BY 4.0

Descargue la última versión de los datos como un Archivo Darwin Core (DwC-A) o los metadatos como EML o RTF:

Datos como un archivo DwC-A descargar 68 registros en Inglés (8 KB) - Frecuencia de actualización: no planeado
Metadatos como un archivo EML descargar en Inglés (14 KB)
Metadatos como un archivo RTF descargar en Inglés (12 KB)

Descripción

This dataset consists of all the epimegabenthic fauna marked and enumerated from two seafloor georeferenced image mosaics from the shelf off Svalbard's Hornsund fjord (Hornsundbanken). 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 two mosaics cover areas of 282 m2 and 164 m2 (446 m2 combined). 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 these mosaics were used in the publication by Sen et al. Fauna of shallow water Arctic seep not driven by water masses currently under review.

Registros

Los datos en este recurso de registros biológicos han sido publicados como Archivo Darwin Core(DwC-A), el cual es un formato estándar para compartir datos de biodiversidad como un conjunto de una o más tablas de datos. La tabla de datos del core contiene 68 registros.

Este IPT archiva los datos y, por lo tanto, sirve como repositorio de datos. Los datos y los metadatos del recurso están disponibles para su descarga en la sección descargas. La tabla versiones enumera otras versiones del recurso que se han puesto a disposición del público y permite seguir los cambios realizados en el recurso a lo largo del tiempo.

Versiones

La siguiente tabla muestra sólo las versiones publicadas del recurso que son de acceso público.

¿Cómo referenciar?

Los usuarios deben citar este trabajo de la siguiente manera:

Sen A, Caudan C, Rodés N, Hong W L, ten Hietbrink S, Szymczycha B, Diak M, Broms F, Knies J (2026). Epimegabenthos based on seafloor georeferenced mosaics of the Hornsundbanken methane seep area. Version 1.1. The University Centre in Svalbard. Occurrence dataset. https://ipt.gbif.no/resource?r=epimegabenthos_hornsundbanken_seep&v=1.1

Derechos

Los usuarios deben respetar los siguientes derechos de uso:

El publicador y propietario de los derechos de este trabajo es The University Centre in Svalbard. Esta obra está bajo una licencia Creative Commons de Atribución/Reconocimiento (CC-BY 4.0).

Registro GBIF

Este recurso ha sido registrado en GBIF con el siguiente UUID: 11cd1b4f-0d2e-418b-8b22-5e00f2308187.  The University Centre in Svalbard publica este recurso y está registrado en GBIF como un publicador de datos avalado por GBIF Norway.

Palabras clave

Occurrence

Contactos

Arunima Sen
  • Autor
  • Associate Professor
The University Centre in Svalbard (UNIS)
Longyearbyen
NO
Corentin Caudan
  • Originador
  • student
Sorbonne University
Nil Rodés
  • Originador
  • engineer
The University Centre in Svalbard (UNIS)
Wei Li Hong
  • Originador
  • Associate Professor
Stockholm University
Sophie ten Hietbrink
  • Originador
  • student
Stockholm University
Beata Szymczycha
  • Originador
  • Associate Professor
Institute of Oceanology Polish Academy of Sciences (IOPAN)
Magdalena Diak
  • Originador
  • Researcher
Institute of Oceanology Polish Academy of Sciences (IOPAN)
Fredrik Broms
  • Originador
  • Researcher
North Norwegian Humpback Whale Catalogue (NNHWC)
Jochen Knies
  • Originador
  • Researcher
Norwegian Geological Survey (NGU), iC3: Centre for ice, Cryosphere, Carbon and Climate
Arunima Sen
  • Autor
  • Associate Professor
The University Centre in Svalbard (UNIS)
Longyear
NO

Cobertura geográfica

Continental shelf off the Hornsund fjord of Svalbard, known as Hornsundbanken

Coordenadas límite Latitud Mínima Longitud Mínima [76,791, 14,159], Latitud Máxima Longitud Máxima [76,793, 14,168]

Cobertura taxonómica

N/A

Filo Chordata, Mollusca, Arthropoda, Porifera, Nemertea, Cnidaria, Annelida, Echinodermata

Cobertura temporal

Fecha Inicial 2023-03-06

Datos del proyecto

Epimegabenthic fauna marked in a GIS (Geographic Information System) from two georeferenced mosaics constructed from still images obtained from ROV (remotely operated vechicle) video.

Título Epimegabenthos based on seafloor georeferenced mosaics of the Hornsundbanken methane seep area
Fuentes de Financiación 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).

Personas asociadas al proyecto:

Arunima Sen
  • Autor

Métodos de muestreo

Numerous gas flares (gas bubbles escaping from the seafloor) have been detected acoustically on the shelf off the Hornsund fjord of Svalbard (known as Hornsundbanken). 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 2 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 (version 2.0.2, build number 16334). Two digital models were constructed, covering a total area of 446 m². The georeferenced mosaics were imported into ArcMap Desktop version 10.8.2 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.

Área de Estudio Two locations within an area of active methane seepage on the seafloor on the continental shelf off the Hornsund fjord of Svalbard (Hornsundbanken).

Descripción de la metodología paso a paso:

  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. Two mosaics were generated. The mosaics were inputted into ArcMap Desktop and all visible features and fauna were marked and enumerated.