Carbonate compensation depth drives abyssal biogeography in the northeast Pacific.

Autor: Simon-Lledó E; National Oceanography Centre, Southampton, UK. erimon@noc.ac.uk., Amon DJ; SpeSeas, D'Abadie, Trinidad and Tobago.; Marine Science Institute, University of California, Santa Barbara, CA, USA., Bribiesca-Contreras G; Natural History Museum, London, UK., Cuvelier D; Institute of Marine Sciences-Okeanos, University of the Azores, Horta, Portugal., Durden JM; National Oceanography Centre, Southampton, UK., Ramalho SP; Centre for Environmental and Marine Studies & Department of Biology, University of Aveiro, Aveiro, Portugal., Uhlenkott K; German Centre for Marine Biodiversity Research, Senckenberg am Meer, Wilhelmshaven, Germany.; Institute for Biology and Environmental Sciences, Carl von Ossietzky University, Oldenburg, Germany., Arbizu PM; German Centre for Marine Biodiversity Research, Senckenberg am Meer, Wilhelmshaven, Germany., Benoist N; National Oceanography Centre, Southampton, UK., Copley J; Ocean & Earth Science, University of Southampton, Southampton, UK., Dahlgren TG; NORCE Climate and Environment, Bergen, Norway.; Department of Marine Sciences, University of Gothenburg, Göteborg, Sweden., Glover AG; Natural History Museum, London, UK., Fleming B; National Oceanography Centre, Southampton, UK.; Ocean & Earth Science, University of Southampton, Southampton, UK., Horton T; National Oceanography Centre, Southampton, UK., Ju SJ; Korea Institute of Ocean Science and Technology, Busan, South Korea.; Ocean Science Major, University of Science and Technology, Daejeon, South Korea., Mejía-Saenz A; National Oceanography Centre, Southampton, UK., McQuaid K; University of Plymouth, Plymouth, UK., Pape E; Marine Biology Research Group, Ghent University, Ghent, Belgium., Park C; Korea Institute of Ocean Science and Technology, Busan, South Korea.; Ocean Science Major, University of Science and Technology, Daejeon, South Korea., Smith CR; Department of Oceanography, University of Hawai'i at Manoa, Honolulu, HI, USA., Jones DOB; National Oceanography Centre, Southampton, UK.
Jazyk: angličtina
Zdroj: Nature ecology & evolution [Nat Ecol Evol] 2023 Sep; Vol. 7 (9), pp. 1388-1397. Date of Electronic Publication: 2023 Jul 24.
DOI: 10.1038/s41559-023-02122-9
Abstrakt: Abyssal seafloor communities cover more than 60% of Earth's surface. Despite their great size, abyssal plains extend across modest environmental gradients compared to other marine ecosystems. However, little is known about the patterns and processes regulating biodiversity or potentially delimiting biogeographical boundaries at regional scales in the abyss. Improved macroecological understanding of remote abyssal environments is urgent as threats of widespread anthropogenic disturbance grow in the deep ocean. Here, we use a new, basin-scale dataset to show the existence of clear regional zonation in abyssal communities across the 5,000 km span of the Clarion-Clipperton Zone (northeast Pacific), an area targeted for deep-sea mining. We found two pronounced biogeographic provinces, deep and shallow-abyssal, separated by a transition zone between 4,300 and 4,800 m depth. Surprisingly, species richness was maintained across this boundary by phylum-level taxonomic replacements. These regional transitions are probably related to calcium carbonate saturation boundaries as taxa dependent on calcium carbonate structures, such as shelled molluscs, appear restricted to the shallower province. Our results suggest geochemical and climatic forcing on distributions of abyssal populations over large spatial scales and provide a potential paradigm for deep-sea macroecology, opening a new basis for regional-scale biodiversity research and conservation strategies in Earth's largest biome.
(© 2023. The Author(s).)
Databáze: MEDLINE
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