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

Registros de Dados

Os dados deste recurso de ocorrência foram publicados como um Darwin Core Archive (DwC-A), que é o formato padronizado para compartilhamento de dados de biodiversidade como um conjunto de uma ou mais tabelas de dados. A tabela de dados do núcleo contém 57 registros.

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Versões

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Como citar

Pesquisadores deveriam citar esta obra da seguinte maneira:

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

Direitos

Pesquisadores devem respeitar a seguinte declaração de direitos:

O editor e o detentor dos direitos deste trabalho é The University Centre in Svalbard. This work is licensed under a Creative Commons Attribution (CC-BY 4.0) License.

GBIF Registration

Este recurso foi registrado no GBIF e atribuído ao seguinte GBIF UUID: 139818b8-f6de-446d-a4e0-32b98c83c0d5.  The University Centre in Svalbard publica este recurso, e está registrado no GBIF como um publicador de dados aprovado por GBIF Norway.

Palavras-chave

Occurrence; Observation

Contatos

Cobertura Geográfica

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

Dados Sobre o Projeto

Nenhuma descrição disponível

O pessoal envolvido no projeto:

Métodos de Amostragem

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.

Descrição dos passos do método:

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.

Metadados Adicionais