Fig. 4: Abundance of the main vulnerable megafauna species observed at Borealis mud volcano.
From: Sanctuary for vulnerable Arctic species at the Borealis Mud Volcano
The substrate is differentiated in carbonate crusts (CC), microbial mats (MM) and background (BG) (details for the definition of the substrate in the Methods section), while the megafauna is distinct in redfish (all encountered species of redfish such as Sebastes norvegicus, S. viviparus and S. mentella; displayed with orange bars) and Corals (including all species of octocorals, such as Primnoa resedaeformis and others classified at lowest possible taxa level through videos; displayed with light blue bars). a Abundance of redfish and corals in the three different environments during each ROV dive. b Total abundance of redfish and corals in all the ROV dives meant to display their overall trend in the entire Borealis site. The megafauna abundance is expressed as the number of occurrences per 10 square meters (10−2 m). Data reported in Supplementary Data 8. c Example of an Octocoral (screenshot from ROV Dive 15; Supplementary Data 1). d Example of a redfish (screenshot from ROV Dive 15; Supplementary Data 1).
