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| Registros recuperados: 10 | |
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| Van Rooij, David. |
| A wide range of geophysical and sedimentological investigations on upper slope sediments of the eastern Porcupine Seabight, SW of Ireland, allowed to evaluate the local importance of bottom currents throughout the Upper Paleogene to recent times, as well as the influence of, and interplay with other deep-water sedimentary processes. The tools available for this study mainly allowed to focus on the nature and characteristics of the Quaternary deposits of seismic unit U1, but also documented buried Middle Eocene to Pliocene sediment drifts and sediment waves. A Late Pliocene erosional event (RD1) created a highly irregular discontinuity, observed from the northern part of the Belgica mound province towards the southern Gollum channel and Goban Spur. During... |
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| Ano: 2004 |
URL: https://archimer.ifremer.fr/doc/00505/61709/65678.pdf |
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| De Mol, Lies; Van Rooij, David; Pirlet, Hans; Greinert, Jens; Frank, Norbert; Quemmerais-amice, Frederic; Henriet, Jean-pierre. |
| In 1948, Le Danois reported for the first time the occurrence of living cold-water coral reefs, the so-called "massifs coralliens", along the European Atlantic continental margin. In 2008, a cruise with R/V Belgica was set out to re-investigate these cold-water corals in the Penmarc'h and Guilvinec Canyons along the Gascogne margin of the Bay of Biscay. During this cruise, an area of 560 km(2) was studied using multibeam swath bathymetry, CTD casts, ROV observations and USBL-guided boxcoring. Based on the multibeam data and the ROV video imagery, two different cold-water coral reef settings were distinguished. In water depths ranging from 260 to 350 m, mini mounds up to 5 m high, covered by dead cold-water coral rubble, were observed. In between these... |
| Tipo: Text |
Palavras-chave: Bay of Biscay; Continental margin; Canyons; Cold-water corals; Lophelia; Madrepora. |
| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00035/14632/13318.pdf |
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| Pham, Christopher K.; Ramirez-llodra, Eva; Alt, Claudia H. S.; Amaro, Teresa; Bergmann, Melanie; Canals, Miquel; Company, Joan B.; Davies, Jaime; Duineveld, Gerard; Galgani, Francois; Howell, Kerry; Huvenne, Veerle A. I.; Isidro, Eduardo; Jones, Daniel O. B.; Lastras, Galderic; Morato, Telmo; Gomes-pereira, Jose Nuno; Purser, Autun; Stewart, Heather; Tojeira, Ines; Tubau, Xavier; Van Rooij, David; Tyler, Paul A.. |
| Anthropogenic litter is present in all marine habitats, from beaches to the most remote points in the oceans. On the seafloor, marine litter, particularly plastic, can accumulate in high densities with deleterious consequences for its inhabitants. Yet, because of the high cost involved with sampling the seafloor, no large-scale assessment of distribution patterns was available to date. Here, we present data on litter distribution and density collected during 588 video and trawl surveys across 32 sites in European waters. We found litter to be present in the deepest areas and at locations as remote from land as the Charlie-Gibbs Fracture Zone across the Mid-Atlantic Ridge. The highest litter density occurs in submarine canyons, whilst the lowest density can... |
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| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00204/31505/29903.pdf |
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| Van Rooij, David; Hebbelin, Dierk; Comas, Menchu; Vandorpe, Thomas; Delivet, Stanislas; Nave, Silvia; Michel, Elisabeth; Lebreiro, Susana; Terrinha, Pedro; Roque, Cristina; Anton, Laura; Batista, Luis; And The Md194 Shipboard Scientists,. |
| Tipo: Text |
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| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00416/52794/53693.pdf |
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| Frank, Norbert; Freiwald, Andre; Lopez Correa, Matthias; Wienberg, Claudia; Eisele, Markus; Hebbeln, Dierk; Van Rooij, David; Henriet, Jean-pierre; Colin, Christophe; Van Weering, Tjeerd; De Haas, Henk; Buhl-mortensen, Pal; Roberts, J. Murray; De Mol, Ben; Douville, Eric; Blamart, Dominique; Hatte, Christine. |
| U-series age patterns obtained on reef framework-forming cold-water corals collected over a nearly 6000-km-long continental margin sector, extending from off Mauritania (17 degrees N; northwest Africa) to the southwestern Barents Sea (70 degrees N; northeastern Europe), reveal strong climate influences on the geographical distribution and sustained development of these ecosystems. Over the past three glacial-interglacial cycles, framework-forming cold-water corals (Lophelia pertusa and Madrepora oculata) seem to have predominantly populated reefs, canyons, and patches in the temperate East Atlantic and the Mediterranean Sea. Above 50 degrees N corals colonize reefs in the northern East Atlantic primarily during warm climate periods with the biogeographic... |
| Tipo: Text |
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| Ano: 2011 |
URL: https://archimer.ifremer.fr/doc/00214/32554/31025.pdf |
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| Dubois-dauphin, Quentin; Bonneau, Lucile; Colin, Christophe; Montero-serrano, Jean-carlos; Montagna, Paolo; Blamart, Dominique; Hebbeln, Dierk; Van Rooij, David; Pons-branchu, Edwige; Hemsing, Freya; Wefing, Anne-marie; Frank, Norbert. |
| The Nd isotopic composition (εNd) of seawater and cold-water coral (CWC) samples from the Gulf of Cádiz and the Alboran Sea, at a depth of 280-827 m were investigated in order to constrain mid-depth water mass dynamics within the Gulf of Cádiz over the past 40 ka. εNd of glacial and Holocene CWC from the Alboran Sea and the northern Gulf of Cádiz reveals relatively constant values (-8.6 to -9.0 and -9.5 to -10.4, respectively). Such values are similar to those of the surrounding present-day mid-depth waters from the Mediterranean Outflow Water (MOW; εNd ∼ -9.4) and Mediterranean Sea Water (MSW; εNd ∼ -9.9). In contrast, glacial εNd values for CWC collected at thermocline depth (550-827 m) in the southern Gulf of Cádiz display a higher average value... |
| Tipo: Text |
Palavras-chave: Neodymium isotopes; Cold-water corals; Mediterranean outflow water; East Antarctic intermediate water; Mediterranean sea water; Gulf of Cadiz. |
| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00339/45047/44446.pdf |
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| 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. |
| 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... |
| Tipo: Text |
Palavras-chave: Carbonate mound; Deep sea corals; U-series dating; Climate; Rockall Bank; Porcupine Seabight. |
| Ano: 2009 |
URL: https://archimer.ifremer.fr/doc/00219/33060/31574.pdf |
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| 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. |
| 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... |
| Tipo: Text |
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| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00635/74734/74724.pdf |
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| Registros recuperados: 10 | |
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