Ancient origin of the modern deep-sea fauna.

The origin and possible antiquity of the spectacularly diverse modern deep-sea fauna has been debated since the beginning of deep-sea research in the mid-nineteenth century. Recent hypotheses, based on biogeographic patterns and molecular clock estimates, support a latest Mesozoic or early Cenozoic...

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Autores principales:	Ben Thuy, Andy S Gale, Andreas Kroh, Michal Kucera, Lea D Numberger-Thuy, Mike Reich, Sabine Stöhr
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2012
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d775df8e86e149908f930985f0151ea4
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spelling	oai:doaj.org-article:d775df8e86e149908f930985f0151ea42021-11-18T08:12:33ZAncient origin of the modern deep-sea fauna.1932-620310.1371/journal.pone.0046913https://doaj.org/article/d775df8e86e149908f930985f0151ea42012-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23071660/?tool=EBIhttps://doaj.org/toc/1932-6203The origin and possible antiquity of the spectacularly diverse modern deep-sea fauna has been debated since the beginning of deep-sea research in the mid-nineteenth century. Recent hypotheses, based on biogeographic patterns and molecular clock estimates, support a latest Mesozoic or early Cenozoic date for the origin of key groups of the present deep-sea fauna (echinoids, octopods). This relatively young age is consistent with hypotheses that argue for extensive extinction during Jurassic and Cretaceous Oceanic Anoxic Events (OAEs) and the mid-Cenozoic cooling of deep-water masses, implying repeated re-colonization by immigration of taxa from shallow-water habitats. Here we report on a well-preserved echinoderm assemblage from deep-sea (1000-1500 m paleodepth) sediments of the NE-Atlantic of Early Cretaceous age (114 Ma). The assemblage is strikingly similar to that of extant bathyal echinoderm communities in composition, including families and genera found exclusively in modern deep-sea habitats. A number of taxa found in the assemblage have no fossil record at shelf depths postdating the assemblage, which precludes the possibility of deep-sea recolonization from shallow habitats following episodic extinction at least for those groups. Our discovery provides the first key fossil evidence that a significant part of the modern deep-sea fauna is considerably older than previously assumed. As a consequence, most major paleoceanographic events had far less impact on the diversity of deep-sea faunas than has been implied. It also suggests that deep-sea biota are more resilient to extinction events than shallow-water forms, and that the unusual deep-sea environment, indeed, provides evolutionary stability which is very rarely punctuated on macroevolutionary time scales.Ben ThuyAndy S GaleAndreas KrohMichal KuceraLea D Numberger-ThuyMike ReichSabine StöhrPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 7, Iss 10, p e46913 (2012)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Ben Thuy Andy S Gale Andreas Kroh Michal Kucera Lea D Numberger-Thuy Mike Reich Sabine Stöhr Ancient origin of the modern deep-sea fauna.
description	The origin and possible antiquity of the spectacularly diverse modern deep-sea fauna has been debated since the beginning of deep-sea research in the mid-nineteenth century. Recent hypotheses, based on biogeographic patterns and molecular clock estimates, support a latest Mesozoic or early Cenozoic date for the origin of key groups of the present deep-sea fauna (echinoids, octopods). This relatively young age is consistent with hypotheses that argue for extensive extinction during Jurassic and Cretaceous Oceanic Anoxic Events (OAEs) and the mid-Cenozoic cooling of deep-water masses, implying repeated re-colonization by immigration of taxa from shallow-water habitats. Here we report on a well-preserved echinoderm assemblage from deep-sea (1000-1500 m paleodepth) sediments of the NE-Atlantic of Early Cretaceous age (114 Ma). The assemblage is strikingly similar to that of extant bathyal echinoderm communities in composition, including families and genera found exclusively in modern deep-sea habitats. A number of taxa found in the assemblage have no fossil record at shelf depths postdating the assemblage, which precludes the possibility of deep-sea recolonization from shallow habitats following episodic extinction at least for those groups. Our discovery provides the first key fossil evidence that a significant part of the modern deep-sea fauna is considerably older than previously assumed. As a consequence, most major paleoceanographic events had far less impact on the diversity of deep-sea faunas than has been implied. It also suggests that deep-sea biota are more resilient to extinction events than shallow-water forms, and that the unusual deep-sea environment, indeed, provides evolutionary stability which is very rarely punctuated on macroevolutionary time scales.
format	article
author	Ben Thuy Andy S Gale Andreas Kroh Michal Kucera Lea D Numberger-Thuy Mike Reich Sabine Stöhr
author_facet	Ben Thuy Andy S Gale Andreas Kroh Michal Kucera Lea D Numberger-Thuy Mike Reich Sabine Stöhr
author_sort	Ben Thuy
title	Ancient origin of the modern deep-sea fauna.
title_short	Ancient origin of the modern deep-sea fauna.
title_full	Ancient origin of the modern deep-sea fauna.
title_fullStr	Ancient origin of the modern deep-sea fauna.
title_full_unstemmed	Ancient origin of the modern deep-sea fauna.
title_sort	ancient origin of the modern deep-sea fauna.
publisher	Public Library of Science (PLoS)
publishDate	2012
url	https://doaj.org/article/d775df8e86e149908f930985f0151ea4
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Ancient origin of the modern deep-sea fauna.

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