Description
Occurrences of marine bottom organisms at
20–500 m depth in the Froan-Sularevet area outside Frøya in Trøndelag, Norway from 30
August – 9 September 2025.
The study area is in or near a proposed marine protected area:
https://faktaark.naturbase.no/?id=VP00001512
The data was collected by Akvaplan-niva during an underwater video survey of 18 transects with a remotely
operated diving vessel (ROV).
Taxonomic identification was done in the field, by an expert in vulnerable marine organisms, from high definition video from the ROV.
Depth and position was obtained via the ROV's navigation software (EIVA NaviPac) and later corrected.
When possible, each individual organism was identified and the number of organisms present in one second of video is reported in individualCount.
Some organisms, were uncountable using visual inspection and are recorded as present with no individual count.
These are coral <pre>Clavularia borealis</pre>, kelp species <pre>Laminaria hyperborea</pre>, <pre>Saccharina latissima</pre>, and stony corals.
<pre>Desmophyllum pertusum</pre>, and <pre>Madrepora oculata</pre>.
Taxonomy is validated against World Register of Marine Species (WoRMS) using GBIF Species API.
The final Darwin Core occurrence data is validated against GBIF data validator service prior to publishing.
Contributions
Jesper Hansen: principal investigator, taxonomic identification, initial data creation.
Conrad Helgeland: data processor, Darwin Core, data validation, GBIF-publishing.
Data Records
The data in this occurrence 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 22,034 records.
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.
Rights
Researchers should respect the following rights statement:
The publisher and rights holder of this work is Akvaplan-niva. This work is licensed under a Creative Commons Attribution (CC-BY 4.0) License.
GBIF Registration
This resource has been registered with GBIF, and assigned the following GBIF UUID: 18b7c5c7-9814-4dc4-a8aa-833e91969358. Akvaplan-niva publishes this resource, and is itself registered in GBIF as a data publisher endorsed by GBIF Norway.
Keywords
Occurrence; Observation
Contacts
- Originator ●
- Point Of Contact
https://orcid.org/0009-0004-7120-717X
Geographic Coverage
Froan-Sularevet area, Trøndelag, Norway
| Bounding Coordinates | South West [63.876, 8.111], North East [64.202, 9.471] |
|---|
Taxonomic Coverage
No Description available
| Kingdom | Chromista, Animalia |
|---|---|
| Phylum | Mollusca, Arthropoda, Porifera, Chordata, Ochrophyta, Cnidaria |
| Class | Demospongiae, Hexacorallia, Phaeophyceae, Bivalvia, Octocorallia, Malacostraca, Teleostei |
| Order | Scleractinia, Pectinida, Suberitida, Decapoda, Gadiformes, Polymastiida, Laminariales, Tetractinellida, Malacalcyonacea, Scleralcyonacea, Bubarida, Poecilosclerida, Axinellida, Tethyida, Haplosclerida, Dictyoceratida |
| Family | Primnoidae, Capnellidae, Mycalidae, Coralliidae, Nephropidae, Halichondriidae, Bubaridae, Dictyonellidae, Stylocordylidae, Tethyidae, Madreporidae, Kophobelemnidae, Axinellidae, Dysideidae, Phloeodictyidae, Laminariaceae, Lotidae, Chalinidae, Theneidae, Caryophylliidae, Alcyoniidae, Tetillidae, Ancorinidae, Acanthogorgiidae, Isodictyidae, Funiculinidae, Polymastiidae, Pennatulidae, Protoptilidae, Pectinidae, Microcionidae, Virgulariidae, Clavulariidae, Geodiidae |
Temporal Coverage
| Start Date / End Date | 2025-08-30 / 2025-09-09 |
|---|
Project Data
No Description available
| Title | Marine protected area Froan - Sularevet |
|---|---|
| Identifier | https://www.statsforvalteren.no/nb/Trondelag/Miljo-og-klima/Verneomrader/marin-verneplan/froan---sularevet/ |
The personnel involved in the project:
Sampling Methods
Human video analysis transects surveyed by remotely operated diving vessel (ROV)
| Study Extent | 10 field days from 2025-08-30 to 2025-09-09. |
|---|
Method step description:
- ?
Additional Metadata
| Acknowledgements | The study is financed by the County Governor of Trøndelag, see https://www.statsforvalteren.no/nb/Trondelag/Miljo-og-klima/Verneomrader/marin-verneplan/froan---sularevet/ for further details (in Norwegian). |
|---|---|
| Purpose | The soft corals within the survey area were distributed across five species of gorgonian sea fans, two species of cauliflower coral, and one species of dead man’s fingers. The gorgonian corals Anthothela grandiflora/Lateothela grandiflora and sea tree (Paragorgia arborea) are both Red-Listed. The largest specimen of sea tree attained a diameter of 170 cm. With a few exceptions, the gorgonians were confined to the reef belt. This included the small species blue horn coral (Clavularia borealis), which is associated with dead coral reef framework and is rarely encountered in coastal waters. The three remaining soft corals were restricted to the shallower marine areas around Froan. There were few locations where the gorgonians formed the habitat type hard-bottom coral forest. Sponges, with 56 097 recorded individuals, constituted the dominant management-relevant taxonomic group in terms of both abundance and species richness on the slope and inward to 40 m depth in the Froan area as well as in the Frohavet. Species richness appears higher than typical for the Norwegian coast. Thirty distinct sponge morphotypes were identified to species or genus level, whereas others could not be identified. The habitat type sponge forest was widespread and encompassed both dense soft-bottom sponge forests characterised by the anchor sponge (Thenea muricata) in the northern Frohavet immediately outside the planning area, as well as several different types of hard-bottom sponge forest within the area. Sea pens were represented by seven species, of which the sea pen Kophobelemnon stelliferum was the most common, while the species Protoptilum thomsonii was the only Red-Listed taxon. The habitat type sea-pen ground was relatively poorly developed and was recorded only in Suladypet; however, it has previously been documented as extensive on the mud bottom north of Suladypet and in Haltendypet. The fish species blue ling (Molva dypterygia), which is Red-Listed as Critically Endangered, was nevertheless observed in relatively dense concentrations in Suladypet. Redfish (Sebastes spp.), among which the common redfish (Sebastes norvegicus) is Red-Listed as Critically Endangered, occurred throughout the area except in the far north, although in most instances species-level identification was not possible. In general, few live king scallops were observed during the survey, and it remains uncertain whether the largest occurrence covered as much as 25 m². |
| Maintenance Description | Only if errors are found. |
| Alternative Identifiers | https://ipt.gbif.no/resource?r=froan-sularevet-2025 |