Offshore Marine Biodiversity and Habitats Assessment. 2020

This report presents the results of research carried out from research cruises, in April 2018 on board the RRS James Clark Ross (JR17-004) and in April 2019 on the RRS Discovery (DY100). The focus of these cruises was to investigate the habitats and biodiversity of the island slopes of st helena and serveral key seamounts. 6622 km2 of seabed including two previously uncharted seamounts were mapped using multibeam technology. 24 Profiles of Conductivity (salinity), Temperature and Depth were collected. 19 shelf underwater camera systems (SUCS) were collected to estimate cover of benthic habitat and Agassiz benthic trawls were used to sample benthic epifauna and infauna. Fisheries accoustics methods were used to assess density and spacial distribution of pelagic and semi-pelagic fish and microneckton.

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Additional Info

Field	Value
Last Updated	December 22, 2021, 10:10 (CET)
Created	December 22, 2021, 10:05 (CET)
Region	Saint Helena
Language	eng
Topic Category	Biota; flora and/or fauna in natural environment
Temporal Extent Start	2018
Temporal Extent End	2019
Dataset Reference Date	2020
Lineage	During the two cruises to St Helena multibeam sonars, shelf underwater camera systems (SUCS), Agassiz trawls, scientific echosounds and CTDs were used to collect date presented in this report.The majority of these sampling efforts took place around St Helena and four main summit reaches the photic zone peaking at 112m deep. The cardno seamount complex is located at the northern edge of the EEZ consists of 3 main seamount connected at their bases above the abyssal know as "Cardno", the central as "Southern Cross" and the eastern summit is yet to be named and so is reffered to as "unamed" seamount. Much of the sampling took place over the photic (<200 m) and mesobenthic/mesopelagic (200-1000 m) zones, while the bathybenthis/bathypelagic (1000-3000 m) and abyssal plain (>3000 m) were less sampled.
West Longitude	-7.6107
South Latitude	-16.3962
East Longitude	-4.8855
North Latitude	-12.5428
Spatial Reference System	EPSG:32730
Responsible Organisation Name	Hidden (personal data protection)
Contact Mail Address	Hidden (personal data protection)
Responsible Party Role	Hidden (personal data protection)
Access Limitations	Open access
Use Constraints	Open
Resource Reference	Saint Helena Government, Environmental Managament Division, Marine Conservation Section.
Data Format	PDF
Update Frequency	unknown
Accuracy	more than 100 metres
Resource Type	Report
Original Title	Hidden (internal use only)
Metadata Date	09/09/2021
Metadata Point of Contact	data.manager@sainthelena.gov.sh
Unique Resource ID	SH-EMD-294