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dc.contributor.authorBraga-Henriques, Andreia
dc.contributor.authorBuhl-Mortensen, Pål
dc.contributor.authorTokat, Erdal
dc.contributor.authorMartins, Ana
dc.contributor.authorSilva, Teresa
dc.contributor.authorJakobsen, Joachim
dc.contributor.authorCanning-Clode, João
dc.contributor.authorJakobsen, Kirsten
dc.contributor.authorDelgado, João
dc.contributor.authorVoirand, Thibaut
dc.contributor.authorBiscoito, Manuel
dc.date.accessioned2022-12-01T10:18:21Z
dc.date.available2022-12-01T10:18:21Z
dc.date.created2022-11-28T08:40:10Z
dc.date.issued2022
dc.identifier.citationFrontiers in Marine Science. 2022, 9 .en_US
dc.identifier.issn2296-7745
dc.identifier.urihttps://hdl.handle.net/11250/3035265
dc.description.abstractThe Madeira archipelago has a unique underwater landscape that is characterised by narrow shelves, steep slopes and a large submarine tributary system that boosts primary productivity in oligotrophic waters and thus offers a potential for hotspots of biodiversity. Despite this, there have been limited deep-water exploration activities with less than five expeditions since the 1960s. Here, we investigated the seabed on the southern side of the Madeira-Desertas Ridge using a manned submersible along a 3.8 km long transect starting at 366 m depth up the ridge shelf until its top at 73 m. Benthic habitats and community composition were documented with video along a depth gradient from mesophotic to deep sea. Six distinct biotopes were recognised (three deeper, and three shallower than 115 m depth). Our results showed a rich biodiversity with deep biotopes characterised by sponges and non-reef-building corals (e.g., Pachastrella monilifera, Viminella flagellum, Eunicella verrucosa) and shallow biotopes comprising macroalgae and the gorgonian Paramuricea cf. grayi. The pronounced benthic zonation reflects the steep environmental gradient that includes high topographic variation, heterogeneous substrates, and bidirectional regular wave-motion at the shallow mesophotic part. Together with biotic factors, such as low density of sea urchins and presence of predatory fish, this environment with unusual deep light penetration, a mesoscale cyclonic eddy, and deep wave-motion, has allowed the establishment of a mature deep-water kelp population of Laminaria ochroleuca in the plateau (max. >100 individuals p/100 m2). At the same time, a conspicuous coral fauna was observed on a wide range of soft to hard bottoms with several species taking advantage of the favourable hydrodynamic regime and seawater properties together with substratum availability to create coral gardens. These habitats were previously not known from Madeira, and their newfound discovery in the archipelago merit further investigation and protection.en_US
dc.language.isoengen_US
dc.titleBenthic community zonation from mesophotic to deep sea: Description of first deep-water kelp forest and coral gardens in the Madeira archipelago (central NE Atlantic)en_US
dc.title.alternativeBenthic community zonation from mesophotic to deep sea: Description of first deep-water kelp forest and coral gardens in the Madeira archipelago (central NE Atlantic)en_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.description.versionpublishedVersionen_US
dc.source.pagenumber25en_US
dc.source.volume9en_US
dc.source.journalFrontiers in Marine Scienceen_US
dc.identifier.doi10.3389/fmars.2022.973364
dc.identifier.cristin2082028
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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