Pliocene agglutinated benthic Foraminifera from Site U1341 in the Bering Sea (IODP Expedition 323)

Kaminski, Michael A.; Kender, Sev; Ciurej, Agnieszka; Bălc, Ramona; Setoyama, Eiichi

doi:10.7306/gq.1087

Cited by 3 publications

(12 citation statements)

References 9 publications

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“…below c. 1 ml l -1 ; Table 1), but not high organic carbon flux (as it does not occur along the northern slope but in the more oligotrophic south-central Bering Sea). Kaminski et al (2013) were the first to observe the highly perforate tests of Karreriella and Martinottiella from the Bering Sea (see Fig. 10:1-10:5) and suggested this feature may have been an adaptation to severely hypoxic conditions, which is supported by the species modern distribution recorded here.…”

Section: Ecological Implicationsmentioning

confidence: 48%

“…The samples were dominated by calcareous benthic foraminifera, which were reported by Expedition 323 Scientists (2011) and reproduced in Table 3. Preservation of agglutinated taxa is generally excellent (see Figs 6 -10), which is in marked contrast to the agglutinatedpoor Pliocene-Recent palaeontological assemblages recovered from down-core samples (Expedition 323 Scientists 2011; Kaminski et al 2013), indicating post-mortem dissolution of the organic cement likely occurred. Abundance is >70 specimens at most sites, apart from Sites U1339 and U1340 where abundances are low due to the small volume of core-top samples collected.…”

Section: Resultsmentioning

confidence: 70%

“…Although a sizeable proportion of Bering Sea agglutinated foraminifera have been recorded in the Pacific Ocean (Jones 1994), there are several species in the core-top samples (this study) and in the Pliocene (Kaminski et al 2013) that appear to be endemic (e.g. Eggerelloides sp.…”

Section: Endemismmentioning

confidence: 99%

“…3 is larger and more robust than the otherwise morphologically similar species Martinottiella sp. 1, recorded from the Pliocene of Bowers Ridge (Kaminski et al 2013), which may have been its evolutionary ancestor. The modern-day distribution of the morphologically similar (although possibly lacking perforations) Martinottiella sp.…”

Section: Ecological Implicationsmentioning

confidence: 99%

“…The interaction of strong currents, upwelling high nutrient water masses, sea ice and strong winds causes high surface water productivity which supports a diverse ecosystem (Stabeno et al 1999) and an expanded oxygen minimum zone (OMZ). Relatively recent palaeoceanographic work indicates that the Bering Sea may have been characterized by high productivity and low oxygen since at least the Pliocene (Expedition 323 Scientists 2011; Kaminski et al 2013) and, therefore, is an ideal place to study the long-term impact of severe hypoxia and high organic carbon flux on benthic organisms, in particular the less well-studied agglutinated foraminifera which are a diverse group particularly tolerant to ocean acidification due to their noncalcareous tests. Observational studies have recorded an expansion of tropical OMZs in the Pacific Ocean and Atlantic Ocean over the last 60 years, which is likely to continue with future increased atmospheric CO 2 emissions and oceanic sequestration (Stramma et al 2008(Stramma et al , 2010Hofmann & Schellnhuber 2009).…”

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confidence: 99%

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Modern deep-water agglutinated foraminifera from IODP Expedition 323, Bering Sea: ecological and taxonomic implications

Kender

Kaminski

2017

Journal of Micropalaeontology

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Despite the importance of the Bering Sea for subarctic oceanography and climate, relatively little is known of the foraminifera from the extensive Aleutian Basin. We report the occurrence of modern deep-water agglutinated foraminifera collected at seven sites cored during Integrated Ocean Drilling Program (IODP) Expedition 323 in the Bering Sea. Assemblages collected from core-top samples contained 32 genera and 50 species and are described and illustrated here for the first time. Commonly occurring species include typical deep-water Rhizammina, Reophax, Rhabdammina, Recurvoides and Nodulina. Assemblages from the northern sites also consist of accessory Cyclammina, Eggerelloides and Glaphyrammina, whilst those of the Bowers Ridge sites consist of other tubular genera and Martinottiella. Of the studied stations with the lowest dissolved oxygen concentrations, the potentially Bering Sea endemic Eggerelloides sp. 1 inhabits the northern slope, which has the highest primary productivity, and the potentially endemic Martinottiella sp. 3 inhabits Bowers Ridge, which has the lowest oxygen concentrations but relatively low annual productivity. Martinottiella sp. 3, with open pores on its test surface, has previously been reported in Pliocene to Recent material from Bowers Ridge. Despite relatively small sample sizes, ecological constraints may imply that the Bering Sea experienced high productivity and reduced oxygen at times since at least the Pliocene. We note the partially endemic nature of the agglutinated foraminiferal assemblages, which may at least in part be due to basin restriction, the geologically long time period of reduced oxygen, and high organic carbon flux. Our results indicate the importance of gathering further surface sample data from the Aleutian Basin.

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Section: Ecological Implicationsmentioning

confidence: 48%

Section: Resultsmentioning

confidence: 70%

Section: Endemismmentioning

confidence: 99%

Section: Ecological Implicationsmentioning

confidence: 99%

mentioning

confidence: 99%

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Modern deep-water agglutinated foraminifera from IODP Expedition 323, Bering Sea: ecological and taxonomic implications

Kender

Kaminski

2017

Journal of Micropalaeontology

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Neogene Benthic Foraminifera from the southern Bering Sea (IODP Expedition 323)

Setoyama

Kaminski

2015

Palaeontologia Electronica

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Paleoceanography of the Bering Sea advanced by IODP Expedition 323:

Asahi

Takahashi

Okazaki

et al. 2018

Jour. Geol. Soc. Japan

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Our understanding of the paleoceanography of the Bering Sea has been considerably advanced by IODP Expedition. The expedition aimed to create a high-resolution record of changes in paleoceanography since the Pliocene in a relatively high-latitude region of the North Pacific, subject to polar amplification. The expedition recovered cores, mainly high-quality Advanced Piston Cores (APC), with a total length of m of continuous cores from seven sites distributed around the perimeter of the Aleutian Basin, including the Bowers Ridge, the Bering Slope edge, and the Umnak Plateau. These cores are crucial to our understanding of sea-ice distribution, productivity, laminated sediments, input of detrital materials, the formation of the North Pacific Intermediate Water mass, the Pacific water mass entry, the history of the Arctic gateway, and the enigma of the intensification of the Northern Hemisphere Glaciation and the mid-Pleistocene Transition. The maximum ages of the cores are ~ Ma at the Bowers Ridge sites and. Ma at the Bering Slope sites. Meltwater from the Alaskan Ice Sheet has influenced the Bering Sea since. Ma, increasing in influence at. and .-. Ma. The significant development of sea-ice formation was identified at two sites on the Bowers Ridge at. and .-. Ma, based on analysis of sea-ice related diatoms and silicoflagellates. Such sea-ice formation affected the extent of the North Pacific Intermediate Water in the Bering Sea, which was strengthened during cold intervals such as when the Bering Strait closed due to falling sea level.

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Pliocene agglutinated benthic Foraminifera from Site U1341 in the Bering Sea (IODP Expedition 323)

Cited by 3 publications

References 9 publications

Modern deep-water agglutinated foraminifera from IODP Expedition 323, Bering Sea: ecological and taxonomic implications

Modern deep-water agglutinated foraminifera from IODP Expedition 323, Bering Sea: ecological and taxonomic implications

Neogene Benthic Foraminifera from the southern Bering Sea (IODP Expedition 323)

Paleoceanography of the Bering Sea advanced by IODP Expedition 323:

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