Sedimentary processes and cold-water coral mini-mounds at the Ferrol canyon head, NW Iberian margin

Collart, Tim; Verreydt, Wencke; Hernández-Molina, F. Javier; Llave, Estefanía; León, Ricardo; Gómez-Ballesteros, M.; Pons‐Branchu, Edwige; Stewart, Heather A.; Rooij, David Van

doi:10.1016/j.pocean.2018.02.027

Cited by 12 publications

(12 citation statements)

References 144 publications

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“…Temperature is usually one of the leading factors at the global scale and over longer time scales (Watling et al, 2013;Yasuhara and Danovaro, 2014;Buhl-Mortensen et al, 2015), whereas at medium spatial scales (10 s of km), the presence of large geomorphological features and biological structures is significant (Henry and Roberts, 2007;Buhl-Mortensen et al, 2010). Substrate typology and food supply appear more important at finer spatial scales (m to km; Vetter and Dayton, 1998;McClain and Barry, 2010;Collart et al, 2018) and over shorter time scales (Yasuhara and Danovaro, 2014).…”

Section: Water Mass Properties As Drivers Of Deep-sea Biodiversity Anmentioning

confidence: 99%

“…Besides seafloor topography and sedimentary features (Levin and Sibuet, 2012;Tong et al, 2012;Collart et al, 2018), many other factors can drive biodiversity and biogeography in the deepsea (Henry et al, 2014;Radice et al, 2016). Most of them are inherent to, or related to, the water mass characteristics, including temperature (Yasuhara and Danovaro, 2014), flow regime (Mienis et al, 2007;van Haren et al, 2014), oxygen concentration (Levin, 2003;Woulds and Cowie, 2007), organic matter supply (White et al, 2012;Cathalot et al, 2015), and circulation patterns (Henry et al, 2014;Somoza et al, 2014) among others.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Water Masses on the Biodiversity and Biogeography of Deep-Sea Benthic Ecosystems in the North Atlantic

et al. 2020

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Circulation patterns in the North Atlantic Ocean have changed and reorganized multiple times over millions of years, influencing the biodiversity, distribution, and connectivity patterns of deep-sea species and ecosystems. In this study, we review the effects of the water mass properties (temperature, salinity, food supply, carbonate chemistry, and oxygen) on deep-sea benthic megafauna (from species to community level) and discussed in future scenarios of climate change. We focus on the key oceanic controls on deep-sea megafauna biodiversity and biogeography patterns. We place particular attention on cold-water corals and sponges, as these are ecosystem-engineering organisms that constitute vulnerable marine ecosystems (VME) with high associated biodiversity. Besides documenting the current state of the knowledge on this topic, a future scenario for water mass properties in the deep North Atlantic basin was predicted. The pace and severity of climate change in the deep-sea will vary across regions. However, predicted water mass properties showed that all regions in the North Atlantic will be exposed to multiple stressors by 2100, experiencing at least one critical change in water temperature (+2 • C), organic carbon fluxes (reduced up to 50%), ocean acidification (pH reduced up to 0.3), aragonite saturation horizon (shoaling above 1000 m) and/or reduction in dissolved oxygen (>5%). The northernmost regions of the North Atlantic will suffer the greatest impacts. Warmer and more acidic oceans will drastically reduce the suitable habitat for ecosystem-engineers, with severe consequences such as declines in population densities, even compromising their long-term survival, loss of biodiversity and reduced biogeographic distribution that might compromise connectivity at large scales. These effects can be aggravated by reductions in carbon fluxes, particularly in areas where food availability is already limited. Declines in benthic biomass and biodiversity will diminish ecosystem services such as habitat provision, nutrient

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Section: Water Mass Properties As Drivers Of Deep-sea Biodiversity Anmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of Water Masses on the Biodiversity and Biogeography of Deep-Sea Benthic Ecosystems in the North Atlantic

et al. 2020

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“…Clear examples of both depositional (plastered drift, separated drift, sediment waves) and erosional (terraces, moats, furrows) features occur along the Galician continental margin and rise (Galicia Bank CFs) (Ercilla et al, 2006(Ercilla et al, , 2008a(Ercilla et al, , 2009Bender et al, 2012;Hanebuth et al, 2015;Llave et al, 2018;Collart et al, 2018). The plastered drifts occur as low-relief mounds of a few kilometres in length, and tens to a few hundred metres in thickness.…”

Section: 3b Contourite Featuresmentioning

confidence: 99%

“…11B). These drifts exhibit mounded shapes and are 5-22 km long, 2-10 km wide and average 50 m in thickness (Jané et al, 2012;Llave et al, 2013Llave et al, , 2018Collart et al, 2018). A separated drift occurs at the foot of the highs across the lower slope of the western Galician continental margin (Bender et al, 2012).…”

Section: 3b Contourite Featuresmentioning

confidence: 99%

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Contourites along the Iberian continental margins: conceptual and economic implications

Llave

Hernández-Molina

García

et al. 2019

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This work uses seismic records to document and classify contourite features around the Iberian continental margin to determine their implications for depositional systems and petroleum exploration. Contourites include depositional features (separated, sheeted, plastered and confined drifts), erosional features (abraded surfaces, channels, furrows and moats) and mixed features (contourite terraces). Drifts generally show high to moderate amplitude reflectors, which are cyclically intercalated with transparent layers. Transparent layers may represent finer grained deposits, which can serve as seal rocks. High amplitude reflectors (HARs) likely represent sandier layers, which could form hydrocarbon reservoirs. HARs occur on erosive features (moats and channels) and are clearly developed on contourite terraces and overflow features. Most of the contourite features described here are influenced by Mediterranean water masses throughout their Pliocene and Quaternary history. They specifically record Mediterranean Outflow Water following its exit through the Gibraltar Strait. This work gives a detailed report on the variation of modern contourite deposits, which can help inform ancient contourite reservoir interpretation. Further research correlating 2D and 3D seismic anomalies with core and well logging data is needed to develop better diagnostic criteria for contourites. This can help clarify the role of contourites in petroleum systems.

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Oceanographic control of the submarine landslides of the northern Galicia Area (Bay of Biscay, NE Atlantic)

et al. 2021

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Sedimentary processes and cold-water coral mini-mounds at the Ferrol canyon head, NW Iberian margin

Cited by 12 publications

References 144 publications

Influence of Water Masses on the Biodiversity and Biogeography of Deep-Sea Benthic Ecosystems in the North Atlantic

Influence of Water Masses on the Biodiversity and Biogeography of Deep-Sea Benthic Ecosystems in the North Atlantic

Contourites along the Iberian continental margins: conceptual and economic implications

Oceanographic control of the submarine landslides of the northern Galicia Area (Bay of Biscay, NE Atlantic)

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