| Online-Ressource |
Verfasst von: | Wienberg, Claudia [VerfasserIn]  |
| Frank, Norbert [VerfasserIn]  |
| Schröder-Ritzrau, Andrea [VerfasserIn]  |
| Krengel, Thomas [VerfasserIn]  |
Titel: | The giant Mauritanian cold-water coral mound province |
Titelzusatz: | Oxygen control on coral mound formation |
Verf.angabe: | Claudia Wienberg, Jürgen Titschack, André Freiwald, Norbert Frank, Tomas Lundälv, Marco Taviani, Lydia Beuck, Andrea Schröder-Ritzrau, Thomas Krengel, Dierk Hebbeln |
E-Jahr: | 2018 |
Jahr: | 20 February 2018 |
Umfang: | 18 S. |
Fussnoten: | Gesehen am 17.03.2020 |
Titel Quelle: | Enthalten in: Quaternary science reviews |
Ort Quelle: | Amsterdam [u.a.] : Elsevier, 1982 |
Jahr Quelle: | 2018 |
Band/Heft Quelle: | 185(2018), Seite 135-152 |
ISSN Quelle: | 0277-3791 |
Abstract: | The largest coherent cold-water coral (CWC) mound province in the Atlantic Ocean exists along the Mauritanian margin, where up to 100m high mounds extend over a distance of ∼400km, arranged in two slope-parallel chains in 400-550m water depth. Additionally, CWCs are present in the numerous submarine canyons with isolated coral mounds being developed on some canyon flanks. Seventy-seven Uranium-series coral ages were assessed to elucidate the timing of CWC colonisation and coral mound development along the Mauritanian margin for the last ∼120,000 years. Our results show that CWCs were present on the mounds during the Last Interglacial, though in low numbers corresponding to coral mound aggradation rates of 16cmkyr−1. Most prolific periods for CWC growth are identified for the last glacial and deglaciation, resulting in enhanced mound aggradation (>1000cmkyr−1), before mound formation stagnated along the entire margin with the onset of the Holocene. Until today, the Mauritanian mounds are in a dormant state with only scarce CWC growth. In the canyons, live CWCs are abundant since the Late Holocene at least. Thus, the canyons may serve as a refuge to CWCs potentially enabling the observed modest re-colonisation pulse on the mounds along the open slope. The timing and rate of the pre-Holocene coral mound aggradation, and the cessation of mound formation varied between the individual mounds, which was likely the consequence of vertical/lateral changes in water mass structure that placed the mounds near or out of oxygen-depleted waters, respectively. |
DOI: | doi:10.1016/j.quascirev.2018.02.012 |
URL: | Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.
Volltext ; Verlag: https://doi.org/10.1016/j.quascirev.2018.02.012 |
| Volltext: http://www.sciencedirect.com/science/article/pii/S0277379117304729 |
| DOI: https://doi.org/10.1016/j.quascirev.2018.02.012 |
Datenträger: | Online-Ressource |
Sprache: | eng |
Sach-SW: | Coral mound |
| Dissolved oxygen concentration |
| Last glacial |
| Mauritanian margin |
| Mound aggradation rate |
| South Atlantic Central Water |
| Submarine canyon |
| Uranium-series dating |
K10plus-PPN: | 1692685287 |
Verknüpfungen: | → Zeitschrift |
¬The¬ giant Mauritanian cold-water coral mound province / Wienberg, Claudia [VerfasserIn]; 20 February 2018 (Online-Ressource)