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The biogeography and ecology of common diatom species in the northern North Atlantic, and their implications for paleoceanographic reconstructions
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. Peer reviewed
- Aarhus University Denmark
- University of Helsinki Finland
- Newcastle University United Kingdom
- University of Szczecin Poland
- Geological Survey of Denmark and Greenland Denmark
Microsoft Academic Graph classification: Biogeography Sea ice Temperate climate music geography music.instrument geography.geographical_feature_category biology Ecology Northern Hemisphere Sediment Thalassionema nitzschioides biology.organism_classification Sea surface temperature Diatom Geology
Sea surface temperature, Sea ice, Oceanography, WEST GREENLAND, ICELAND, HOLOCENE CLIMATE, Diatoms, ICE VARIABILITY, Calibration dataset, Paleontology, RECORD, Northern hemisphere, DISKO BUGT, OCEANOGRAPHIC CONDITIONS, SEA-SURFACE TEMPERATURE, BAY, 1181 Ecology, evolutionary biology, SEDIMENTS
Sea surface temperature, Sea ice, Oceanography, WEST GREENLAND, ICELAND, HOLOCENE CLIMATE, Diatoms, ICE VARIABILITY, Calibration dataset, Paleontology, RECORD, Northern hemisphere, DISKO BUGT, OCEANOGRAPHIC CONDITIONS, SEA-SURFACE TEMPERATURE, BAY, 1181 Ecology, evolutionary biology, SEDIMENTS
Microsoft Academic Graph classification: Biogeography Sea ice Temperate climate music geography music.instrument geography.geographical_feature_category biology Ecology Northern Hemisphere Sediment Thalassionema nitzschioides biology.organism_classification Sea surface temperature Diatom Geology
citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).21 popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.Top 10% influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).Average impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.Top 10% citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).21 popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.Top 10% influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).Average impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.Top 10% Powered byBIP!