Living (Stained) Benthic Foraminiferal Response to Primary Production and Hydrography in the Deepest Part of the Gullmar Fjord, Swedish West Coast, With Comparisons to Hoglund's 1927 Material

Gustafsson, Mikael

doi:10.2113/0310002

Cited by 94 publications

(69 citation statements)

References 25 publications

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“…It has been suggested that E. vitrea is tolerant to high accumulation rate settings [Blackwelder et al, 1996] and exhibits some tolerance to anoxia [Blackwelder et al, 1996;Gustafsson and Nordberg, 2000;Osterman, 2003;Platon et al, 2005]. Deposition of phytodetritus does not trigger increased reproduction of this species [Gustafsson and Nordberg, 2001;Gooday and Hughes, 2002] but rather an upward migration to shallower depths in the sediment [Ernst et al, 2005]. On the contrary, Rasmussen et al [1996Rasmussen et al [ , 2002 suggest that E. vitrea in cores from the North Atlantic region is indicative of sporadic, i.e., seasonal food supply under well-oxygenated ambient bottom water conditions, a habitat that could be intermediate between that of E. exigua and Epistominella arctica.…”

Section: Pa4218mentioning

confidence: 92%

Paleoceanography of the southern Agulhas Plateau during the last 150 ka: Inferences from benthic foraminiferal assemblages and multispecies epifaunal carbon isotopes

et al. 2007

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[1] Benthic foraminiferal assemblages and the carbon isotope composition of the epifaunal benthic foraminifera Epistominella exigua and Fontbotia wuellerstorfi have been investigated along core MD02-2589 located at the southern Agulhas Plateau (41°26.03 0 S, 25°15.30 0 E, 2660 m water depth). This study aims to evaluate changes in the benthic paleoenvironment and its influence on benthic d 13 C with a notable focus on E. exigua, a species associated with phytodetritus deposits and poorly studied in isotope paleoceanographic reconstructions. The benthic foraminiferal assemblages (>63 mm) show large fluctuations in species composition suggesting significant changes in the pattern of ocean surface productivity conceivably related to migrations of the Subtropical Convergence (STC) and Subantarctic Front (SAF). Low to moderate seasonality and relatively higher food supply to the seafloor are indicated during glacial marine isotope stages (MIS) 6, 4, and 2 and during MIS 3, probably associated with the northward migration of the SAF and confluence with the more stationary STC above the southern flank of the Agulhas Plateau. The lowest organic carbon supply to the seafloor is indicated from late MIS 5b to MIS 4 as a consequence of increased influence of the Agulhas Front (AF) and/or weakening of the influence of the STC over the region. Episodic delivery of fresh organic matter, similar to modern conditions at the core location, is indicated during MIS 5c-MIS 5e and at Termination I. Comparison of this paleoenvironmental information with the paired d 13 C records of E. exigua and F. wuellerstorfi suggests that organic carbon offsets d 13 C of E. exigua from ambient bottom water d 13 C DIC , while its d 13 C amplitude, on glacial-interglacial timescales, does not seem affected by changes of organic carbon supply to the seafloor. This suggests that this species calcifies preferentially during the short time span of the year when productivity peaks and phytodetritus is delivered to the seafloor. Therefore E. exigua, while offset from d 13 C DIC , potentially more faithfully records the amplitude of ambient bottom water d 13 C DIC changes than F. wuellerstorfi, notably in settings such as the Southern Ocean that experienced substantial changes through time in the organic carbon supply to the seafloor.Citation: Diz, P., I. R. Hall, R. Zahn, and E. G. Molyneux (2007), Paleoceanography of the southern Agulhas Plateau during the last 150 ka: Inferences from benthic foraminiferal assemblages and multispecies epifaunal carbon isotopes, Paleoceanography, 22, PA4218,

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Section: Pa4218mentioning

confidence: 92%

Paleoceanography of the southern Agulhas Plateau during the last 150 ka: Inferences from benthic foraminiferal assemblages and multispecies epifaunal carbon isotopes

et al. 2007

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“…Conradsen et al, 1994;Murray, 1995, 1997;Alve, 2003;Gustafsson and Nordberg, 2001;Duffield et al, 2015). The absolute abundance of planktonic foraminifera, stable carbon isotopes and total organic carbon also inform on past variability of productivity.…”

Section: Productivity Changes In the Last Millenniummentioning

confidence: 99%

Coastal primary productivity changes over the last millennium: a case study from the Skagerrak (North Sea)

Binczewska¹,

Risebrobakken²,

Asteman³

et al. 2018

Preprint

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Abstract.A comprehensive multi-proxy study on two sediment cores from western and central Skagerrak was performed in order to detect the variability and causes of marine primary productivity changes in the investigated region over the last 1100 years. The cores were dated by Hg pollution records and AMS 14 C dating and analysed for palaeoproductivity proxies such as total organic carbon, δ 13 C, total planktonic foraminifera, benthic foraminifera (total as well as abundance of Brizalina skagerrakensis and other palaeoproductivity taxa) and palaeothermometers such as Mg/Ca and δ 18 O. Our results reveal three 5

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“…3) (Hald and Korsun, 1997;Hald, 1998, 2000;Gustafsson and Nordberg, 2001;Majewski, 2005). Elphidium spp.…”

Section: Foraminiferal Assemblagementioning

confidence: 99%

“…A decrease in refractory carbon suggests that availability of food to foraminifera increases during late summer. Food availability is one of the most important factors contributing to foraminiferal abundance, and an increase in labile organic matter supports the likelihood of a late summer reproduction event (Gustafsson and Nordberg, 2001).…”

Section: Environmental Variability On the Seafloormentioning

confidence: 99%

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Intra-annual Variability in Benthic Foraminiferal Abundance in Sediments of Disenchantment Bay, an Alaskan Glacial Fjord

Ullrich

Cowan

Zellers

et al. 2009

Arctic, Antarctic, and Alpine Research

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Living (Stained) Benthic Foraminiferal Response to Primary Production and Hydrography in the Deepest Part of the Gullmar Fjord, Swedish West Coast, With Comparisons to Hoglund's 1927 Material

Cited by 94 publications

References 25 publications

Paleoceanography of the southern Agulhas Plateau during the last 150 ka: Inferences from benthic foraminiferal assemblages and multispecies epifaunal carbon isotopes

Paleoceanography of the southern Agulhas Plateau during the last 150 ka: Inferences from benthic foraminiferal assemblages and multispecies epifaunal carbon isotopes

Coastal primary productivity changes over the last millennium: a case study from the Skagerrak (North Sea)

Intra-annual Variability in Benthic Foraminiferal Abundance in Sediments of Disenchantment Bay, an Alaskan Glacial Fjord

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