Data/hora: 10/06/2024 09:58:58

Provedor de dados: 	5	
País: 	France	
Título: 	The Holocene occurrence of cold water corals in the NE Atlantic: Implications for coral carbonate mound evolution	
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.	
Data: 	2009-10	
Ano: 	2009	
Palavras-chave: 	Carbonate mound; Deep sea corals; U-series dating; Climate; Rockall Bank; Porcupine Seabight.	
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 &lt;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.	
Tipo: 	Text	
Idioma: 	Inglês	
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/	
Editor: 	Elsevier Science Bv	
Formato: 	application/pdf	
Fonte: 	Marine Geology (0025-3227) (Elsevier Science Bv), 2009-10 , Vol. 266 , N. 1-4 , P. 129-142	
Fonte: 	2009 Elsevier B.V. All rights reserved.

info:eu-repo/semantics/openAccess

restricted use