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MARCOBOLO - MARine COastal BiOdiversity Long-term Observations. Observation during the MarcoBolo campaign of May 2025 in the Belgian part of the North Sea
Citation
Debusschere, E.; Cuyx, B.; Aubach, J.; Conings, B.; Calonge, A.; Muñiz, C. 2025. MARCOBOLO - MARine COastal BiOdiversity Long-term Observations. Observation during the MarcoBolo campaign of May 2025 in the Belgian part of the North Sea. https://marineinfo.org/doc/dataset/9027
Contact: Debusschere, Elisabeth
Archived data
Availability: Creative Commons License This dataset is licensed under a Creative Commons Attribution 4.0 International License.
Description

This dataset contains the biodiversity observations collected during the deployment of two seabed landers equipped with multiple biotic sensors as part of the MarcoBolo campaign, which took place on 16 May 2025. The two seabed landers were deployed at the Grafton shipwreck in the Belgian part of the North Sea (BPNS).

One lander was equipped with a split-beam echosounder (SIMRAD WBAT) with upward-facing transducers (70 kHz CW and 200 kHz FM), a hydrophone (Soundtrap ST600HF), and an acoustic receiver (VEMCO). The other lander was equipped with a genomic sampler (RoCSI), a cetacean logger (Chelonia F-POD), and an acoustic receiver (VEMCO).

The landers were retrieved on 15 October and 11 June 2025, respectively.

Scope
Themes:
Biology, Biology > Acoustics, Biology > Mammals, Physical > Underwater acoustics
Keywords:
Marine/Coastal · Acoustic data · Acoustic detection · Cetacea · Echosounders · Hydrophones · Belgian Exclusive Economic Zone · Phocoena phocoena (Linnaeus, 1758) · Pisces
Geographical coverage
Belgian Exclusive Economic Zone [Marine Regions]
Temporal coverage
May 2025
Taxonomic coverage
Phocoena phocoena (Linnaeus, 1758) [WoRMS]
Pisces [WoRMS]
Parameters
Acoustic detections Methodology
click train detections translated to acoustic presence absence data per minute Methodology
School detection of pelagic fish Methodology
Sound pressure
Acoustic detections: Single-beam and multi-beam echosounders
De opnamen van de diepte van de onderwaterbodem worden gedaan bij hoogwater, om ook de oevers zo goed mogelijk in kaart te kunnen brengen. Met de peilvletten, welke een diepgang hebben van ongeveer 1m, en bij een hoogwater van ongeveer 4 à 5 meter GLLWS worden op deze manier meestal diepten opgemeten van de rivierbodem tot 1m à 2m boven GLLWS. Standaard worden deze dieptemetingen uitgevoerd met enkelvoudige echosounders (singlebeam echosounders) met twee frequenties, 33 khz en 210 khz, waarbij
click train detections translated to acoustic presence absence data per minute: Hydrophone underwater recordings
School detection of pelagic fish: Single-beam and multi-beam echosounders
De opnamen van de diepte van de onderwaterbodem worden gedaan bij hoogwater, om ook de oevers zo goed mogelijk in kaart te kunnen brengen. Met de peilvletten, welke een diepgang hebben van ongeveer 1m, en bij een hoogwater van ongeveer 4 à 5 meter GLLWS worden op deze manier meestal diepten opgemeten van de rivierbodem tot 1m à 2m boven GLLWS. Standaard worden deze dieptemetingen uitgevoerd met enkelvoudige echosounders (singlebeam echosounders) met twee frequenties, 33 khz en 210 khz, waarbij
Contributors
Vlaams Instituut voor de Zee (VLIZ), more, principal investigator, data creator
Debusschere, Elisabeth
Cuyx, Bram
Aubach, Julia
Conings, Bram
Calonge, Arienne
Fernandez Muñiz, Carlota
Related datasets
Source dataset:
Lifewatch_additional_stations: LifeWatch observatory data: Additional stations of harbour porpoise detection in the Belgian part of the North Sea, more
Project
Marco-Bolo: MARine COastal BiOdiversity Long-term Observations, more
Funding Horizon Europe
Grant agreement ID 101082021
Dataset status: Completed
Data type: Data
Data origin: Research: field experiment
Metadatarecord created: 2026-02-18
Information last updated: 2026-08-25
All data in the Integrated Marine Information System (IMIS) is subject to the VLIZ privacy policy