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Development, Productivity, and Seasonality of Living Planktonic Foraminiferal Faunas and Limacina helicina in an Area of Intense Methane Seepage in the Barents Sea

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Development, Productivity, and Seasonality of Living Planktonic Foraminiferal Faunas and Limacina helicina in an Area of Intense Methane Seepage in the Barents Sea. / Ofstad, Siri; Meilland, Julie; Zamelczyk, Katarzyna; Chierici, Melissa; Fransson, Agneta; Gründger, Friederike; Rasmussen, Tine L.

I: Journal of Geophysical Research: Biogeosciences, Bind 125, Nr. 2, e2019JG005387, 02.2020.

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

Harvard

Ofstad, S, Meilland, J, Zamelczyk, K, Chierici, M, Fransson, A, Gründger, F & Rasmussen, TL 2020, 'Development, Productivity, and Seasonality of Living Planktonic Foraminiferal Faunas and Limacina helicina in an Area of Intense Methane Seepage in the Barents Sea', Journal of Geophysical Research: Biogeosciences, bind 125, nr. 2, e2019JG005387. https://doi.org/10.1029/2019JG005387

APA

Ofstad, S., Meilland, J., Zamelczyk, K., Chierici, M., Fransson, A., Gründger, F., & Rasmussen, T. L. (2020). Development, Productivity, and Seasonality of Living Planktonic Foraminiferal Faunas and Limacina helicina in an Area of Intense Methane Seepage in the Barents Sea. Journal of Geophysical Research: Biogeosciences, 125(2), [e2019JG005387]. https://doi.org/10.1029/2019JG005387

CBE

Ofstad S, Meilland J, Zamelczyk K, Chierici M, Fransson A, Gründger F, Rasmussen TL. 2020. Development, Productivity, and Seasonality of Living Planktonic Foraminiferal Faunas and Limacina helicina in an Area of Intense Methane Seepage in the Barents Sea. Journal of Geophysical Research: Biogeosciences. 125(2):Article e2019JG005387. https://doi.org/10.1029/2019JG005387

MLA

Vancouver

Ofstad S, Meilland J, Zamelczyk K, Chierici M, Fransson A, Gründger F o.a. Development, Productivity, and Seasonality of Living Planktonic Foraminiferal Faunas and Limacina helicina in an Area of Intense Methane Seepage in the Barents Sea. Journal of Geophysical Research: Biogeosciences. 2020 feb;125(2). e2019JG005387. https://doi.org/10.1029/2019JG005387

Author

Ofstad, Siri ; Meilland, Julie ; Zamelczyk, Katarzyna ; Chierici, Melissa ; Fransson, Agneta ; Gründger, Friederike ; Rasmussen, Tine L. / Development, Productivity, and Seasonality of Living Planktonic Foraminiferal Faunas and Limacina helicina in an Area of Intense Methane Seepage in the Barents Sea. I: Journal of Geophysical Research: Biogeosciences. 2020 ; Bind 125, Nr. 2.

Bibtex

@article{24c433a0741349349753d4a1648ff379,
title = "Development, Productivity, and Seasonality of Living Planktonic Foraminiferal Faunas and Limacina helicina in an Area of Intense Methane Seepage in the Barents Sea",
abstract = "Although the plankton communities in the Barents Sea have been intensely studied for decades, little is known about the living planktonic foraminiferal (LPF) and pteropod faunas, especially those found at methane seep sites. Along a repeated transect in the “crater area” (northern Barents Sea, 74.9°N, 27.7°E) in spring and summer 2016 the flux of LPF and of the pteropod species Limacina helicina showed a high degree of variability. The LPF had low concentration (0–6 individuals m−3) and small tests ({\=x} = 103.3 μm) in spring and a 53-fold increase (43–436 individuals m−3) and larger tests ({\=x} = 188.6 μm) in summer. Similarly, the concentration of L. helicina showed a tenfold increase between spring and summer. The LPF species composition remained stable with the exception of the appearance of subtropical species in summer. No relationship was observed between the spatial distribution of LPF, L. helicina, and methane concentrations in the area. The methane plumes in April coincided with elevated dissolved inorganic carbon, low pH, and calcium carbonate saturation states, and the methane concentration seemed to be controlled by lateral advection. The δ13C and δ18O of Neogloboquadrina pachyderma and Turborotalita quinqueloba are comparable to previous observations in the Arctic and do not show any influence of methane in the isotopic signals of the shells. Although no evidence of direct impact of high methane concentrations on the LPF (size and concentration) were found, we speculate that methane could indirectly enhance primary productivity, and thus biomass, through several potential pathways.",
keywords = "Barents Sea, Limacina helicina, Methane, Planktonic forminifera, Seasonality",
author = "Siri Ofstad and Julie Meilland and Katarzyna Zamelczyk and Melissa Chierici and Agneta Fransson and Friederike Gr{\"u}ndger and Rasmussen, {Tine L.}",
year = "2020",
month = feb,
doi = "10.1029/2019JG005387",
language = "English",
volume = "125",
journal = "Journal of Geophysical Research",
issn = "0148-0227",
publisher = "American Geophysical Union",
number = "2",

}

RIS

TY - JOUR

T1 - Development, Productivity, and Seasonality of Living Planktonic Foraminiferal Faunas and Limacina helicina in an Area of Intense Methane Seepage in the Barents Sea

AU - Ofstad, Siri

AU - Meilland, Julie

AU - Zamelczyk, Katarzyna

AU - Chierici, Melissa

AU - Fransson, Agneta

AU - Gründger, Friederike

AU - Rasmussen, Tine L.

PY - 2020/2

Y1 - 2020/2

N2 - Although the plankton communities in the Barents Sea have been intensely studied for decades, little is known about the living planktonic foraminiferal (LPF) and pteropod faunas, especially those found at methane seep sites. Along a repeated transect in the “crater area” (northern Barents Sea, 74.9°N, 27.7°E) in spring and summer 2016 the flux of LPF and of the pteropod species Limacina helicina showed a high degree of variability. The LPF had low concentration (0–6 individuals m−3) and small tests (x̄ = 103.3 μm) in spring and a 53-fold increase (43–436 individuals m−3) and larger tests (x̄ = 188.6 μm) in summer. Similarly, the concentration of L. helicina showed a tenfold increase between spring and summer. The LPF species composition remained stable with the exception of the appearance of subtropical species in summer. No relationship was observed between the spatial distribution of LPF, L. helicina, and methane concentrations in the area. The methane plumes in April coincided with elevated dissolved inorganic carbon, low pH, and calcium carbonate saturation states, and the methane concentration seemed to be controlled by lateral advection. The δ13C and δ18O of Neogloboquadrina pachyderma and Turborotalita quinqueloba are comparable to previous observations in the Arctic and do not show any influence of methane in the isotopic signals of the shells. Although no evidence of direct impact of high methane concentrations on the LPF (size and concentration) were found, we speculate that methane could indirectly enhance primary productivity, and thus biomass, through several potential pathways.

AB - Although the plankton communities in the Barents Sea have been intensely studied for decades, little is known about the living planktonic foraminiferal (LPF) and pteropod faunas, especially those found at methane seep sites. Along a repeated transect in the “crater area” (northern Barents Sea, 74.9°N, 27.7°E) in spring and summer 2016 the flux of LPF and of the pteropod species Limacina helicina showed a high degree of variability. The LPF had low concentration (0–6 individuals m−3) and small tests (x̄ = 103.3 μm) in spring and a 53-fold increase (43–436 individuals m−3) and larger tests (x̄ = 188.6 μm) in summer. Similarly, the concentration of L. helicina showed a tenfold increase between spring and summer. The LPF species composition remained stable with the exception of the appearance of subtropical species in summer. No relationship was observed between the spatial distribution of LPF, L. helicina, and methane concentrations in the area. The methane plumes in April coincided with elevated dissolved inorganic carbon, low pH, and calcium carbonate saturation states, and the methane concentration seemed to be controlled by lateral advection. The δ13C and δ18O of Neogloboquadrina pachyderma and Turborotalita quinqueloba are comparable to previous observations in the Arctic and do not show any influence of methane in the isotopic signals of the shells. Although no evidence of direct impact of high methane concentrations on the LPF (size and concentration) were found, we speculate that methane could indirectly enhance primary productivity, and thus biomass, through several potential pathways.

KW - Barents Sea

KW - Limacina helicina

KW - Methane

KW - Planktonic forminifera

KW - Seasonality

UR - http://www.scopus.com/inward/record.url?scp=85080118210&partnerID=8YFLogxK

U2 - 10.1029/2019JG005387

DO - 10.1029/2019JG005387

M3 - Journal article

AN - SCOPUS:85080118210

VL - 125

JO - Journal of Geophysical Research

JF - Journal of Geophysical Research

SN - 0148-0227

IS - 2

M1 - e2019JG005387

ER -