Description
Photographic surveys were carried out during the expedition ARK-XXVII/3 in summer 2012 (2 August-29 September) in the Nansen and Amundsen Basins for the first time in deep-sea areas previously fully covered by ice. Seafloor was photographed using a towed Ocean Floor Observation System (OFOS). Nine stations separated from each other by 52–689 nautical miles distance (one transect per station) were performed: four in the Nansen Basin (1,2,3,9) at depths 3571–4066 m, and five in the Amundsen Basin (4,5,6,7,8) at depths 4041–4384 m. Stations 1–5 were situated closer to the marginal ice zone and were characterized by first-year sea ice, whereas stations 7–9 were situated at some distance from the ice edge and were characterized by multiyear ice. Station 6 was somewhat closer to the ice edge in 2012 than in any previous year. Total analysed area of the seafloor comprised 16190 m2. Length of transects varied from 210 m to 5500 m.Agassiz trawl samples (frame width 3m, mesh size 2cm) were taken in the immediate vicinity of the photographic transects to obtain specimens for verification of taxonomic identifications based on images.All images were analysed and stored using the image analysis program and database BIIGLE (Bio-Image Indexing, Graphic Labelling, and Exploration) web-2.0 (www.BIIGLE.de). All taxa were labelled in BIIGLE by species/feature name selected from a drop-down list. Visible megafauna was counted and identified to the lowest possible taxonomic level. Taxonomic identifications were made with the assistance of zoological experts. Laser points were automatically enhanced by BIIGLE software, and used for calculation of the seafloor surface area on images in an automated way using a BIIGLE subroutine.
Data Records
The data in this sampling event resource has been published as a Darwin Core Archive (DwC-A), which is a standardized format for sharing biodiversity data as a set of one or more data tables. The core data table contains 9 records.
1 extension data tables also exist. An extension record supplies extra information about a core record. The number of records in each extension data table is illustrated below.
This IPT archives the data and thus serves as the data repository. The data and resource metadata are available for download in the downloads section. The versions table lists other versions of the resource that have been made publicly available and allows tracking changes made to the resource over time.
Versions
The table below shows only published versions of the resource that are publicly accessible.
How to cite
Researchers should cite this work as follows:
Rybakova E, Kremenetskaia A, Vedenin A, Boetius A, Gebruk A (2021): Deep-sea megabenthos of the Eurasian Central Arctic based on image analysis. Dataset/megabenthos abundance. https://gbif.ocean.ru/ipt/resource?r=mb_centralarctic_polarsternark-xxvii_3_ofos&v=1.0
Rights
Researchers should respect the following rights statement:
The publisher and rights holder of this work is Shirshov Institute of Oceanology, Russian Academy of Sciences. This work is licensed under a Creative Commons Attribution Non Commercial (CC-BY-NC 4.0) License.
GBIF Registration
This resource has been registered with GBIF, and assigned the following GBIF UUID: 37497bf7-31a0-4fd5-9591-2b47004f5ab9. Shirshov Institute of Oceanology, Russian Academy of Sciences publishes this resource, and is itself registered in GBIF as a data publisher endorsed by Participant Node Managers Committee.
Keywords
megabenthos; Central Arctic; image analysis
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Additional Metadata
| Alternative Identifiers | https://gbif.ocean.ru/ipt/resource?r=mb_centralarctic_polarsternark-xxvii_3_ofos |
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