FN Archimer Export Format
PT J
TI The influence of Atlantic climate variability on the long-term development of Mediterranean cold-water coral mounds (Alboran Sea, Melilla Mound Field)
BT 
AF Fentimen, Robin
   Feenstra, Eline
   Ruggeberg, Andres
   Hall, Efraim
   Rime, Valentin
   Vennemann, Torsten
   Hajdas, Irka
   Rosso, Antonietta
   Van Rooij, David
   Adatte, Thierry
   Vogel, Hendrik
   Frank, Norbert
   Krengel, Thomas
   Foubert, Anneleen
AS 1:1;2:1;3:1;4:1;5:1;6:2;7:3;8:4;9:5;10:2;11:6;12:7;13:7;14:1;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;11:;12:;13:;14:;
C1 Department of Geosciences, University of Fribourg, Fribourg, CH-1700, Switzerland
   Institute of Earth Surface Dynamics, University of Lausanne, Lausanne, CH-1015, Switzerland
   Laboratory of Ion Beam Physics, ETH Zürich, Zürich, CH-8093, Switzerland
   Department of Biological, Geological and Environmental Sciences, University of Catania, Catania, 95128, Italy
   Department of Geology, Ghent University, Ghent, 9000, Belgium
   Institute of Geological Sciences and Oeschger Centre for Climate Change Research, University of Bern, Bern, CH-3012, Switzerland
   Institute of Environmental Physics, University of Heidelberg, Heidelberg, D-69120, Germany
C2 UNIV FRIBOURG, SWITZERLAND
   UNIV LAUSANNE, SWITZERLAND
   ETH ZURICH, SWITZERLAND
   UNIV CATANIA, ITALY
   UNIV GHENT, BELGIUM
   UNIV BERN, SWITZERLAND
   UNIV HEIDELBERG, GERMANY
IN DOAJ
TC 0
UR https://archimer.ifremer.fr/doc/00635/74734/74724.pdf
LA English
DT Article
CR MD 194 / EUROFLEET - GATEWAY
BO Marion Dufresne
AB This study provides a detailed reconstruction of climatic events affecting a cold-water coral mound located within the East Melilla Coral Province (Southeast Alboran Sea) over the last 300 ky. Based on benthic foraminiferal assemblages, macrofaunal quantification, grain size analysis, sediment geochemistry, and foraminiferal stable isotope compositions, a reconstruction of environmental conditions prevailing in the region is proposed. The variations in planktonic and benthic δ18O values indicate that cold-water coral mound formation follows global climatic variability. Cold-water corals develop during both interglacial and glacial periods, although interglacial conditions would have allowed better proliferation. Environmental conditions during glacial periods, particularly during the Last Glacial Maximum, appear to better suit the ecological requirements of the erect cheilostome bryozoan Buskea dichotoma. Benthic foraminiferal assemblages suggest that high organic carbon flux characterized interglacial periods. Results from this study imply that increased influence of warm and moist Atlantic air masses during interglacial periods led to increased fluvial discharge, providing nutrients for cold-water corals. Important interglacial Atlantic Water mass inflow further promoted strong Alboran Gyres, and thus mixing between surface and intermediate water masses. Increased turbulence and nutrient supply would have hence provided suitable conditions for coral development. In contrast, benthic foraminiferal assemblages and grain size distributions suggest that the benthic environment received less organic matter during glacial periods, whilst bottom flow velocity was reduced in comparison to interglacial periods. During glacial periods, arid continental conditions combined to more stratified water masses caused a dwindling of coral communities in the southeastern Alboran Sea, although aeolian dust input may have allowed these to survive. In contrast to Northeast Atlantic counterparts, coral mound build-up in the southeastern Alboran Sea occurs during glacial as well as during interglacial periods and at very low aggradation rates (between 1 and 9 cm ky−1). We propose that Buskea dichotoma plays an important role in long-term mound formation at the East Melilla Coral Province, noticeably during glacial periods. 
PY 2020
SO Climate of the Past
SN 1814-9332
PU Copernicus GmbH
DI 10.5194/cp-2020-82
ID 74734
ER

EF