2023/01/01 by Welly Qwabe, Toufiek Samaai, Jean M. Harris +4 · 3 citations
Earth and Planetary Sciences · Environmental Science · #Biology #Coral and Marine Ecosystems Studies #Coral reef #Ecology #Geography #Geology #Habitat #Kelp forest #Marine Biology and Ecology Research #Marine and coastal plant biology #Marine protected area #Oceanography #Range (aeronautics) #Reef #Subtropics #Wetland
paper · doi:10.1017/s0025315423000784
published in Journal of the Marine Biological Association of the United Kingdom 103 (Cambridge University Press)
openalex publication_date 2023/01/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Abstract A dense Ecklonia radiata (Laminariales) kelp forest extending at least 35 km has been found between 45 and 60 m depth range within the mesophotic zone inside the iSimangaliso marine-protected area (MPA) at the iSimangaliso Wetland park World Heritage Site on the east coast of South Africa. This is the first visual confirmation of the occurrence of E. radiata beds in subtropical South Africa, in an area situated between the tropical and subtropical bioregions, in an area that spans the Natal and Delagoa bioregions of the south-western Indian Ocean, more than 350 km north of its previously documented South African range. The kelp was found to be present across the length of the MPA, but dense beds were present only in the southern Natal bioregion, with sparse occurrences observed elsewhere on soft-coral and sponge-dominated reefs in the upper mesophotic zone. The footage was collected in November 2020, May 2021 and November 2022 during remotely operated vehicle and drop camera surveys of the mesophotic zone inside the MPA. This discovery adds to the body of knowledge on the global distribution of Laminariales populations in deep tropical and subtropical settings and the diversity of habitats within South Africa's largest coastal MPA.