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

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說明

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.

資料紀錄

此資源出現紀錄的資料已發佈為達爾文核心集檔案（DwC-A），其以一或多組資料表構成分享生物多樣性資料的標準格式。核心資料表包含 57 筆紀錄。

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版本

以下的表格只顯示可公開存取資源的已發布版本。

如何引用

研究者應依照以下指示引用此資源。:

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

權利

研究者應尊重以下權利聲明。:

此資料的發布者及權利單位為 The University Centre in Svalbard。 This work is licensed under a Creative Commons Attribution (CC-BY 4.0) License.

GBIF 註冊

此資源已向GBIF註冊，並指定以下之GBIF UUID: 139818b8-f6de-446d-a4e0-32b98c83c0d5。 The University Centre in Svalbard 發佈此資源，並經由GBIF Norway同意向GBIF註冊成為資料發佈者。

關鍵字

Occurrence; Observation

聯絡資訊

Arunima Sen

出處 ●
連絡人

Associate Professor

The University Centre in Svalbard (UNIS)

Longyearbyen

Brian Sevin

出處

University of Zagreb

Antonia Kotliarov

出處

Memorial University of Newfoundland

Wei Li Hong

出處

Stockholm University

Beata Szymczycha

出處

Institute of Oceanology Polish Academy of Sciences (IOPAN)

Magdalena Diak

出處

Institute of Oceanology Polish Academy of Sciences (IOPAN)

Aivo Lepland

出處

Geological Survey of Norway (NGU)

Jochen Knies

出處

Norwegian Geological Survey (NGU), iC3: Centre for ice, Cryosphere, Carbon and Climate

地理涵蓋範圍

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

界定座標範圍	緯度南界經度西界 [68.157, 10.466], 緯度北界經度東界 [68.168, 10.472]

計畫資料

無相關描述

計畫名稱	Arctic Submarine Groundwater Discharge (Arctic SGD)
經費來源	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).

參與計畫的人員:

Arunima Sen

擁有者

Beata Szymczycha

研究主持人

Wei Li Hong

擁有者

取樣方法

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.

研究範圍	Methane seeps in two canyons on the continental slope off Lofoten-Vesterålen (northern Norway)

方法步驟描述:

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.

額外的詮釋資料

替代的識別碼	139818b8-f6de-446d-a4e0-32b98c83c0d5
	https://ipt.gbif.no/resource?r=epiimegabenthos_lofoten-vesteralen_canyon_seeps