The biogeography and ecology of common diatom species in the northern North Atlantic, and their implications for paleoceanographic reconstructions

Mimmi Oksman, Stephen Juggins, Arto Miettinen, Andrzej Witkowski, Kaarina Weckström

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

Sammanfattning

Sound knowledge of present-day diatom species and their environments is crucial when attempting to reconstruct past climate and environmental changes based on fossil assemblages. For the North Atlantic region, the biogeography and ecology of many diatom taxa that are used as indicator-species in paleoceanographic studies are still not well known. Using information contained in large diatom-environment calibration datasets can greatly increase our knowledge on diatom taxa and improve the accuracy of paleoenvironmental reconstructions. A diatom calibration dataset including 183 surface sediment samples from the northern North Atlantic was used to explore the distribution and ecology of 21 common Northern Hemisphere diatom taxa. We define the ecological responses of these species to April sea ice concentrations and August sea surface temperatures (aSSTs) using Huisman-Olff-Fresco (HOF)-response curves, provide distribution maps, temperature optima and ranges, and high-quality light microscope images. Based on the results, we find species clearly associated with cold, warm and temperate waters. All species have a statistically significant relationship with aSST, and 15 species with sea ice. Of these, Actinocyclus curvatulus, Fragilariopsis oceanica and Porosira glacialis are most abundant at high sea ice concentrations, whereas Coscinodiscus radiants, Shionodiscus oestrupii, Thalassionema nitzschioides, Thalassiosira angulata, Thalassiosira nordenskioeldii and Thalassiosira pacifica are associated with low sea ice concentrations/ice-free conditions. Interestingly, some species frequently used as sea ice indicators, such as Fragilariopsis cylindrus, show similar abundances at high and low sea ice concentrations with no statistically significant relationship to sea ice.

Originalspråkengelska
TidskriftMarine Micropaleontology
Volym148
Sidor (från-till)1-28
Antal sidor28
ISSN0377-8398
DOI
StatusPublicerad - apr 2019
MoE-publikationstypA1 Tidskriftsartikel-refererad

Vetenskapsgrenar

  • 1181 Ekologi, evolutionsbiologi

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title = "The biogeography and ecology of common diatom species in the northern North Atlantic, and their implications for paleoceanographic reconstructions",
abstract = "Sound knowledge of present-day diatom species and their environments is crucial when attempting to reconstruct past climate and environmental changes based on fossil assemblages. For the North Atlantic region, the biogeography and ecology of many diatom taxa that are used as indicator-species in paleoceanographic studies are still not well known. Using information contained in large diatom-environment calibration datasets can greatly increase our knowledge on diatom taxa and improve the accuracy of paleoenvironmental reconstructions. A diatom calibration dataset including 183 surface sediment samples from the northern North Atlantic was used to explore the distribution and ecology of 21 common Northern Hemisphere diatom taxa. We define the ecological responses of these species to April sea ice concentrations and August sea surface temperatures (aSSTs) using Huisman-Olff-Fresco (HOF)-response curves, provide distribution maps, temperature optima and ranges, and high-quality light microscope images. Based on the results, we find species clearly associated with cold, warm and temperate waters. All species have a statistically significant relationship with aSST, and 15 species with sea ice. Of these, Actinocyclus curvatulus, Fragilariopsis oceanica and Porosira glacialis are most abundant at high sea ice concentrations, whereas Coscinodiscus radiants, Shionodiscus oestrupii, Thalassionema nitzschioides, Thalassiosira angulata, Thalassiosira nordenskioeldii and Thalassiosira pacifica are associated with low sea ice concentrations/ice-free conditions. Interestingly, some species frequently used as sea ice indicators, such as Fragilariopsis cylindrus, show similar abundances at high and low sea ice concentrations with no statistically significant relationship to sea ice.",
keywords = "1181 Ecology, evolutionary biology, Diatoms, Calibration dataset, Northern hemisphere, Sea surface temperature, Sea ice, SEA-SURFACE TEMPERATURE, WEST GREENLAND, ICE VARIABILITY, OCEANOGRAPHIC CONDITIONS, HOLOCENE CLIMATE, DISKO BUGT, ICELAND, BAY, SEDIMENTS, RECORD",
author = "Mimmi Oksman and Stephen Juggins and Arto Miettinen and Andrzej Witkowski and Kaarina Weckstr{\"o}m",
year = "2019",
month = "4",
doi = "10.1016/j.marmicro.2019.02.002",
language = "English",
volume = "148",
pages = "1--28",
journal = "Marine Micropaleontology",
issn = "0377-8398",
publisher = "Elsevier Scientific Publ. Co",

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The biogeography and ecology of common diatom species in the northern North Atlantic, and their implications for paleoceanographic reconstructions. / Oksman, Mimmi; Juggins, Stephen; Miettinen, Arto; Witkowski, Andrzej; Weckström, Kaarina.

I: Marine Micropaleontology, Vol. 148, 04.2019, s. 1-28.

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

TY - JOUR

T1 - The biogeography and ecology of common diatom species in the northern North Atlantic, and their implications for paleoceanographic reconstructions

AU - Oksman, Mimmi

AU - Juggins, Stephen

AU - Miettinen, Arto

AU - Witkowski, Andrzej

AU - Weckström, Kaarina

PY - 2019/4

Y1 - 2019/4

N2 - Sound knowledge of present-day diatom species and their environments is crucial when attempting to reconstruct past climate and environmental changes based on fossil assemblages. For the North Atlantic region, the biogeography and ecology of many diatom taxa that are used as indicator-species in paleoceanographic studies are still not well known. Using information contained in large diatom-environment calibration datasets can greatly increase our knowledge on diatom taxa and improve the accuracy of paleoenvironmental reconstructions. A diatom calibration dataset including 183 surface sediment samples from the northern North Atlantic was used to explore the distribution and ecology of 21 common Northern Hemisphere diatom taxa. We define the ecological responses of these species to April sea ice concentrations and August sea surface temperatures (aSSTs) using Huisman-Olff-Fresco (HOF)-response curves, provide distribution maps, temperature optima and ranges, and high-quality light microscope images. Based on the results, we find species clearly associated with cold, warm and temperate waters. All species have a statistically significant relationship with aSST, and 15 species with sea ice. Of these, Actinocyclus curvatulus, Fragilariopsis oceanica and Porosira glacialis are most abundant at high sea ice concentrations, whereas Coscinodiscus radiants, Shionodiscus oestrupii, Thalassionema nitzschioides, Thalassiosira angulata, Thalassiosira nordenskioeldii and Thalassiosira pacifica are associated with low sea ice concentrations/ice-free conditions. Interestingly, some species frequently used as sea ice indicators, such as Fragilariopsis cylindrus, show similar abundances at high and low sea ice concentrations with no statistically significant relationship to sea ice.

AB - Sound knowledge of present-day diatom species and their environments is crucial when attempting to reconstruct past climate and environmental changes based on fossil assemblages. For the North Atlantic region, the biogeography and ecology of many diatom taxa that are used as indicator-species in paleoceanographic studies are still not well known. Using information contained in large diatom-environment calibration datasets can greatly increase our knowledge on diatom taxa and improve the accuracy of paleoenvironmental reconstructions. A diatom calibration dataset including 183 surface sediment samples from the northern North Atlantic was used to explore the distribution and ecology of 21 common Northern Hemisphere diatom taxa. We define the ecological responses of these species to April sea ice concentrations and August sea surface temperatures (aSSTs) using Huisman-Olff-Fresco (HOF)-response curves, provide distribution maps, temperature optima and ranges, and high-quality light microscope images. Based on the results, we find species clearly associated with cold, warm and temperate waters. All species have a statistically significant relationship with aSST, and 15 species with sea ice. Of these, Actinocyclus curvatulus, Fragilariopsis oceanica and Porosira glacialis are most abundant at high sea ice concentrations, whereas Coscinodiscus radiants, Shionodiscus oestrupii, Thalassionema nitzschioides, Thalassiosira angulata, Thalassiosira nordenskioeldii and Thalassiosira pacifica are associated with low sea ice concentrations/ice-free conditions. Interestingly, some species frequently used as sea ice indicators, such as Fragilariopsis cylindrus, show similar abundances at high and low sea ice concentrations with no statistically significant relationship to sea ice.

KW - 1181 Ecology, evolutionary biology

KW - Diatoms

KW - Calibration dataset

KW - Northern hemisphere

KW - Sea surface temperature

KW - Sea ice

KW - SEA-SURFACE TEMPERATURE

KW - WEST GREENLAND

KW - ICE VARIABILITY

KW - OCEANOGRAPHIC CONDITIONS

KW - HOLOCENE CLIMATE

KW - DISKO BUGT

KW - ICELAND

KW - BAY

KW - SEDIMENTS

KW - RECORD

U2 - 10.1016/j.marmicro.2019.02.002

DO - 10.1016/j.marmicro.2019.02.002

M3 - Article

VL - 148

SP - 1

EP - 28

JO - Marine Micropaleontology

JF - Marine Micropaleontology

SN - 0377-8398

ER -