Marine mammal biodiversity and rare narwhal ( Monodon monoceros ) observations near northern Ellesmere Island, Canada
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چکیده
منابع مشابه
Climatic influences on streamflow and sediment flux into Lake C2, northern Ellesmere Island, Canada
Streamflow, suspended sediment transport and meteorological variables at two elevations were measured through the 1990-1992 field seasons at Lake C2, northern Ellesmere Island, as part of the Taconite Inlet Lakes Project. The objectives were to determine the extent to which suspended sediment flux responded to climatic variability, and to ascertain which meteorological variable was most strongl...
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Rapid changes in sea ice cover associated with global warming are poised to have marked impacts on polarmarinemammals.Here we examine skeletalmuscle characteristics supporting swimming and diving in one polar species, the narwhal, and use these attributes to further document this cetacean’s vulnerability to unpredictable sea ice conditions and changing ecosystems. We found that extreme morpholo...
متن کاملThe climatic signal in varved sediments from Lake C2, northern Ellesmere Island, Canada
Annually-laminated clastic sediments preserve a high resolution proxy record of paleoclimate, provided that allochthonous sedimentation represents a response to meteorological forcing of watershed sediment transfer. Here, we demonstrate this linkage, and illustrate a calibration process using the most recent 40 years of a varve record from Lake C2 (82~ t N; 78000 ' W), three years of field meas...
متن کاملWinter Feeding Intensity of Narwhals (monodon Monoceros)
Stomach contents from 121 narwhals (Monondon monoceros) harvested in the eastern Canadian High Arctic and West Greenland were used to quantify seasonal changes in feeding activity and prey selection. Stomachs collected from summer harvests were mostly empty with little evidence of recent feeding. Stomachs collected in late fall and winter harvests had considerable amounts of undigested material...
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Aspartic acid racemization rate in narwhal (Monodon monoceros) eye lens nuclei estimated by counting of growth layers in tusks Eva Garde, Mads Peter Heide-Jørgensen, Susanne Ditlevsen & Steen H. Hansen 1 Center for GeoGenetics, Natural History Museum of Denmark, University of Copenhagen, Øster Voldgade 5 7, DK-1350 Copenhagen Ø, Denmark 2 Greenland Institute of Natural Resources, PO Box 570, DK...
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ژورنال
عنوان ژورنال: Ecosphere
سال: 2021
ISSN: 2150-8925,2150-8925
DOI: 10.1002/ecs2.3534