Cold‐water coral mounds revealed

William, Trevor; Kano, Akihiro; Ferdelman, Timothy G; Henriet, Jean‐Pierre; Abe, Kohei; Andres, Miriam S.; Bjerager, Morten; Browning, Emily L; Cragg, Barry A.; Mol, Ben De; Dorschel, Boris; Foubert, Anneleen; Frank, Tracy D.; Fuwa, Yuji; Gaillot, P.; Gharib, J. J.; Gregg, Jay M.; Huvenne, Veerle; Léonide, Philippe; Li, Xianghui; Mangelsdorf, Kai; Tanaka, Akiko; Monteys, Xavier; Novosel, I.; Sakai, Saburo; Samarkin, V.; Sasaki, Keiichi; Spivack, Arthur J.; Takashima, Chizuru; Titschak, Jürgen

doi:10.1029/2006eo470001

Cited by 38 publications

(25 citation statements)

References 7 publications

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“…3e). In addition, the VMGR derived from the coral age-depth relationship is solely~8 cm ka − 1 and corals "disappeared" on the investigated spot most likely about 3000 years ago as today Challenger Mound is covered entirely with dead coral rubble (Williams et al, 2006). Interestingly, corals appear directly on glacial sediments containing ice rafted debris and thus a hard-substrate is missing, which certainly did not favour coral settlement.…”

Section: Mound Evolution During the Holocenementioning

confidence: 99%

“…1b). Gravity core MD01-2451G (51G, 762 m depth) was recovered on top of Challenger Mound within the Belgica Mound province, which has a south-north elongated shape and rises about 153 m above the seabed (Williams et al, 2006;Kano et al, 2007) (Fig. 1c).…”

Section: Core Locationsmentioning

confidence: 99%

“…1d). This mound has again a south-north elongated shape (Wheeler et al, 2005;Williams et al, 2006) and is covered with a strikingly active coral ecosystem (Olu Le-Roy, 2004). Sampling occurred slightly on the eastern flank close to the top of the mound near the presently active L. pertusa and Madrepora oculata coral ecosystem (Fig.…”

Section: Core Locationsmentioning

confidence: 99%

“…1c). Today, this mound is covered by dead coral rubble in contrast to the flourishing coral ecosystems recorded on Thérèse Mound (Olu Le-Roy, 2004;de Mol et al, 2007) and Galway Mound (Foubert et al, 2005;Eisele et al, 2008) situated nearby but at deeper depth (Williams et al, 2006). The core was taken on the north-western tip of the summit off the mound flank facing the northward moving currents and it is situated next to the site of recent IODP drilling 307 (Fig.…”

Section: Core Locationsmentioning

confidence: 99%

“…Much progress has been made on our understanding of coral reproduction, food web and environmental factors steering modern coral growth (see and for review (Roberts et al, 2009). IODP 307 expedition in the Porcupine Seabight has further revealed that a carbonate mound in Porcupine Seabight (Challenger Mound) is entirely the result of deepwater coral growth since about 2.6 Ma ago (Williams et al, 2006;Kano et al, 2007). But mound evolution is discontinuous, diagenesis is important, and mounds are shaped through erosion ones coral growth is absent (Rüggeberg et al, 2003;Frank et al, 2005;Dorschel et al, 2005;Foubert et al, 2007;Kano et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

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The Holocene occurrence of cold water corals in the NE Atlantic: Implications for coral carbonate mound evolution

et al. 2009

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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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Section: Mound Evolution During the Holocenementioning

confidence: 99%

Section: Core Locationsmentioning

confidence: 99%

Section: Core Locationsmentioning

confidence: 99%

Section: Core Locationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Holocene occurrence of cold water corals in the NE Atlantic: Implications for coral carbonate mound evolution

et al. 2009

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Paleoseawater density reconstruction and its implication for cold‐water coral carbonate mounds in the northeast Atlantic through time

et al. 2016

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Carbonate buildups and mounds are impressive biogenic structures throughout Earth history.In the recent NE Atlantic, cold-water coral (CWC) reefs form giant carbonate mounds of up to 300 m of elevation. The expansion of these coral carbonate mounds is paced by climatic changes during the past 2.7 Myr. Environmental control on their development is directly linked to controls on its main constructors, the reef-building CWCs. Seawater density has been identified as one of the main controlling parameter of CWC growth in the NE Atlantic. One possibility is the formation of a pycnocline above the carbonate mounds, which is increasing the hydrodynamic regime, supporting elevated food supply, and possibly facilitating the distribution of coral larvae. The potential to reconstruct past seawater densities from stable oxygen isotopes of benthic foraminifera has been further developed: a regional equation gives reliable results for three different settings, peak interglacials (e.g., Holocene), peak glacials (e.g., Last Glacial Maximum), and intermediate setting (between the two extremes). Seawater densities are reconstructed for two different NE Atlantic CWC carbonate mounds in the Porcupine Seabight indicating that the development of carbonate mounds is predominantly found at a seawater density range between 27.3 and 27.7 kg m À3 (σ Θ notation). Comparable to recent conditions, we interpret the reconstructed density range as a pycnocline serving as boundary layer, on which currents develop, carrying nutrition and possibly coral larvae. The close correlation of CWC reef growth with reconstructed seawater densities through the Pleistocene highlights the importance of pycnoclines and intermediate water mass dynamics.

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Carbonate Grain Associations: their Use and Environmental Significance, a Brief Review

Kindler¹,

Wilson

2012

Carbonate Systems During the Oligocene–Miocene Climatic Transition

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Cold‐water coral mounds revealed

Cited by 38 publications

References 7 publications

The Holocene occurrence of cold water corals in the NE Atlantic: Implications for coral carbonate mound evolution

The Holocene occurrence of cold water corals in the NE Atlantic: Implications for coral carbonate mound evolution

Paleoseawater density reconstruction and its implication for cold‐water coral carbonate mounds in the northeast Atlantic through time

Carbonate Grain Associations: their Use and Environmental Significance, a Brief Review

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