| Registro completo |
| Provedor de dados: |
ArchiMer
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| País: |
France
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| Título: |
The Holocene occurrence of cold water corals in the NE Atlantic: Implications for coral carbonate mound evolution
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| Autores: |
Frank, Norbert
Ricard, Estelle
Lutringer-paquet, Audrey
Van Der Land, Cees
Colin, Christophe
Blamart, Dominique
Foubert, Anneleen
Van Rooij, David
Henriet, Jean-pierre
De Haas, Henk
Van Weering, Tjeerd
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| Data: |
2009-10
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| Ano: |
2009
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| Palavras-chave: |
Carbonate mound
Deep sea corals
U-series dating
Climate
Rockall Bank
Porcupine Seabight
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| Resumo: |
U-series dating of constructional cold-water corals is a powerful tool to reconstruct the evolution of corals on carbonate mounds. Here we have investigated the time framework of corals such as Lophelia pertusa and Madrepora oculata on five different mound settings of the eastern North Atlantic (on Rockall Bank and in Porcupine Seabight), sampled at variable depth and location (610-880 m water depth). We have found that the past 11 ka reflect a period generally favourable for coral development. We further determined local mound growth rates and identified mound surface erosion (framework collapse) during times of active coral framework construction. "Local" vertical mound growth rates vary between less than 5 cm ka(-1) and up to 220 cm ka(-1). We interpret rates exceeding 15 cm ka(-1) as representative of densely populated coral reefs. During times of reduced or absent coral development, mound evolution rates are by far smaller (0 to <5 cm ka(-1)). The time resolution achieved here furthermore provides first evidence for reduced coral (ecosystem) activity at 1.8-2.0 ka, 4.2-4.8 ka and between 6 and 8.2 ka within the Holocene that may be related to climate driven changes of the coral growth environments. During Glacial periods coral growth in those areas seems apparently extremely reduced or is even absent on mounds.
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| Tipo: |
Text
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| Idioma: |
Inglês
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| Identificador: |
https://archimer.ifremer.fr/doc/00219/33060/31574.pdf
DOI:10.1016/j.margeo.2009.08.007
https://archimer.ifremer.fr/doc/00219/33060/
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| Editor: |
Elsevier Science Bv
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| Formato: |
application/pdf
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| Fonte: |
Marine Geology (0025-3227) (Elsevier Science Bv), 2009-10 , Vol. 266 , N. 1-4 , P. 129-142
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| Direitos: |
2009 Elsevier B.V. All rights reserved.
info:eu-repo/semantics/openAccess
restricted use
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