<scp>S</scp>ub‐arctic <scp>H</scp>olocene climatic and oceanographic variability in <scp>S</scp>tjernsund, northern <scp>N</scp>orway: evidence from benthic foraminifera and stable isotopes

Correa, Matthias López; Schönfeld, Joachim; Rüggeberg, Andres; Freiwald, André

doi:10.1111/j.1502-3885.2012.00303.x

Cited by 5 publications

(13 citation statements)

References 114 publications

(382 reference statements)

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“…Norway, a cooling event was also reported at 3.3 ka in Stjernsundand associated with an overall cooling of the NAC that could also explain the decline in reef growth rate reported in this area Joseph et al, 2012). The rapid climate change occurring ~ 2.7 ka ago is probably one of the best documented periods of rapid climate change in the late Holocene (Mayewski et al, 2004).…”

Section: Ka -5 Ka: Optimum Conditions For L Pertusa?mentioning

confidence: 65%

Growth of north-east Atlantic cold-water coral reefs and mounds during the Holocene: A high resolution U-series and 14C chronology

Douarin

Elliot

Noble

et al. 2013

Earth and Planetary Science Letters

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We investigate the Holocene growth history of the Mingulay Reef Complex, a seascape of inshore cold-water coral reefs off western Scotland, using U-series dating of 34 downcore and radiocarbon dating of 21 superficial corals. Both chronologies reveal that the reef framework-forming scleractinian coral Lophelia pertusa shows episodic occurrence during the late Holocene. Downcore U-series dating revealed unprecedented reef growth rates of up to 12 mm a -1 with a mean rate of 3 -4 mm a -1 .Our study highlighted a persistent hiatus in coral occurrence from 1.4 ka to modern times despite present day conditions being conducive for coral growth. The growth history of the complex was punctuated at least twice by periods of reduced growth rates: 1.75 -2.8 ka, 3.2 -3.6 ka and to a lesser extent at 3.8 -4 ka and 4.2 ka. Timing of coral hiatuses and reduced reef growth rates at Mingulay were synchronous with those occurring across northern Europe. Our study suggests that large-scale shifts in 1 palaeoenvironmental regimes associated with changes to the North Atlantic subpolar gyre may control these ecosystems. IntroductionOne of the most widespread cold-water corals is the reef framework-forming scleractinian Lophelia pertusa, which to date is known from all oceans except the Southern Ocean ). In the NE Atlantic, Lophelia occurs preferentially along the European continental margin (De Mol et al., 2002;Kenyon et al., 2003;Wheeler et al., 2007) where it is often associated with areas of positive topographic relief such as banks, seamounts and ridges likely due to favourable environmental conditions (e.g. hydrology, food supply, current strength; Davies et al., 2008). Local hydrodynamics are crucial for coral dispersal and recruitment, preventing corals from being smothered by sediments, and as a food supply mechanism for sessile suspension feeders such as corals (Genin et al., 1986;Frederiksen et al., 1992;White et al., 2005;Mienis et al., 2007;White, 2007;Davies et al., 2009;Mienis et al., 2009).Some of the best-studied Lophelia reefs are those found on coral carbonate mounds that can grow hundreds of metres high and few kilometres long (Wheeler et al., 2007). Several models of coral carbonate mound ontogeny have been proposed to explain the initiation and development of such structures, which generally converge on the importance of a complex interaction between sediment accumulation and coldwater coral colonisation and growth under favourable environmental regimes (Henriet et al., 2001;De Mol et al., 2002;Dorschel, 2003;Roberts et al., 2006;Eisele et al., 2008; de Haas et al., 2008). The last 11 ka, as well as previous warm interglacial periods such as marine isotope stages (MIS) 5, 7 and 9, have been favourable for coral growth and thus coral carbonate mound development in the NE Atlantic between 50°N and 70°N (Frank et al., 2009;Douville et al., 2010;. To date no Lophelia from glacial periods have been found at these latitudes in the NE Atlantic (Dorschel, 2003;Kenyon et al., 2003;Schröder-Ritzrau et al., 2003;Fra...

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Section: Ka -5 Ka: Optimum Conditions For L Pertusa?mentioning

confidence: 65%

Growth of north-east Atlantic cold-water coral reefs and mounds during the Holocene: A high resolution U-series and 14C chronology

Douarin

Elliot

Noble

et al. 2013

Earth and Planetary Science Letters

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“…They attribute this fluctuating pattern of oxygen isotopes to reduced inflow of Atlantic water into the fjord, and to the reduced water depth resulting from the isostatic uplift which, in turn increased the heat transfer to the atmosphere (see also López Correa et al, 2012). Joseph et al (2013) report also a gradual bottom water cooling of 4 1C marked by a drop in benthic foraminifera diversity and by the increasing dominance of polar and arctic species between ca. 200 and 2500 cal.…”

Section: The Development Of the Cwc Reef And The Holocene Recordmentioning

confidence: 78%

“…yr BP is characterized at Stjernsund, by bottom water temperatures of about 4-7 1C, strong influence of the Atlantic water masses and high organic carbon fluxes to the sea-floor (Joseph et al 2013). In this fjord, the planktonic foraminifera are scarce, possibly because of lowered sub-surface water salinity (Joseph et al, 2013).…”

Section: The Development Of the Cwc Reef And The Holocene Recordmentioning

confidence: 99%

“…8). In Stjernsund, López Correa et al (2012) and Joseph et al (2013) link the cooling of bottom water temperatures during the late Holocene to reduced Atlantic water inflow in the fjord resulting from the isostatic uplift of Fennoscandia.…”

Section: Influence Of Atlantic Waters Under a Sea-ice Cover Free Envimentioning

confidence: 99%

“…In Stjernsund, Joseph et al (2013) showed that a benthic foraminiferal fauna turnover occurred at ca. 5000 cal.…”

Section: The Development Of the Cwc Reef And The Holocene Recordmentioning

confidence: 99%

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Late Weichselian deglaciation and early Holocene development of a cold-water coral reef along the Lopphavet shelf (Northern Norway) recorded by benthic foraminifera and ostracoda

Stalder

Spezzaferri

Rüggeberg

et al. 2014

Deep Sea Research Part II: Topical Studies in Oceanography

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Cold-water coral (CWC) settlement in northern Norway is strongly related to the outlet-glaciers of the Fennoscandian Ice-sheet, and dating of known CWC structures show clearly post-glacial ages. Two gravity cores (POS391 559/2,277 cm long and POS391 559/3,282 cm long) were recovered on a CWC reef in the area of Lopphavet, northern Norway. Detailed investigations on lithology (sediment structures and composition), micropaleontology (foraminifera and ostracoda) and AMS 14 C dating on the epibenthic foraminifera Discanomalina coronata were performed on the two cores. Phosphorus analyses were performed only on core POS391 559/3. Results indicate that the whole core POS391 559/2 is representative of a CWC reef environment. The base of the core is dated at 10,6007120 cal. yr BP, thus representing one of the oldest ages of a Norwegian coral reef. Core POS391 559/3 documents the passage from a proximal glacier environment characterized by fine silty sediments with intercalation of several dropstone layers to a CWC ecosystem. The transition from the glacial to the interglacial stage is dated as old as 10,7257205 cal. yr BP, whereas the base of the core is dated to an age of 15,3007550 cal. yr BP. Diversity of benthic foraminifera is higher within the CWC, especially in the intervals containing coral framework. Five clusters are identified based on the Bray-Curtis Similarity Term Analyses and the interpretation of data shows that they are related to different ecological settings, e.g., fluctuations of the sea-ice cover; influence of the warmer and more saline Atlantic water masses; transitional to a fully interglacial environment; well oxygenated, nutrient-rich and high current setting being conducive to CWC.Ostracod assemblages show that these crustaceans may be also used to characterize sedimentary facies on CWC reefs.

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Distribution and constraining factors of planktonic and benthic foraminifers in bottom sediments of the southern South China Sea

Jian

Liu

Zhang

et al. 2018

Palaeogeography, Palaeoclimatology, Palaeoecology

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Sub‐arctic Holocene climatic and oceanographic variability in Stjernsund, northern Norway: evidence from benthic foraminifera and stable isotopes

Cited by 5 publications

References 114 publications

Growth of north-east Atlantic cold-water coral reefs and mounds during the Holocene: A high resolution U-series and 14C chronology

Growth of north-east Atlantic cold-water coral reefs and mounds during the Holocene: A high resolution U-series and 14C chronology

Late Weichselian deglaciation and early Holocene development of a cold-water coral reef along the Lopphavet shelf (Northern Norway) recorded by benthic foraminifera and ostracoda

Distribution and constraining factors of planktonic and benthic foraminifers in bottom sediments of the southern South China Sea

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