Biogeography of Freshwater Ostracodes in the Canadian Arctic Archipelago

Seven species of freshwater ostracodes were identified from the sediments of 43 lakes on eight islands across the Canadian Arctic Archipelago. No ostracodes were encountered in the sediments of almost half of the lakes, and most were found at sites that had higher alkalinity. Several taxa endemic to...

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Bibliographic Details
Published in:ARCTIC
Main Authors: Bunbury, Joan, Gajewski, Konrad
Format: Article in Journal/Newspaper
Language:English
Published: The Arctic Institute of North America 2009
Subjects:
Online Access:https://journalhosting.ucalgary.ca/index.php/arctic/article/view/63217
Description
Summary:Seven species of freshwater ostracodes were identified from the sediments of 43 lakes on eight islands across the Canadian Arctic Archipelago. No ostracodes were encountered in the sediments of almost half of the lakes, and most were found at sites that had higher alkalinity. Several taxa endemic to Arctic regions are found across the Arctic Archipelago, including Candona rectangulata Alm, Limnocythere liporeticulata Delorme, and Tonnacypris glacialis Sars. The distributions of Cytherissa lacustris Sars, Cyclocypris globosa Sars, Limnocythere sappaensis Staplin, and Limnocythere (Limnocytherina) camera Delorme are more limited; this fact is attributed to differences in ion composition and concentrations. Sept espèces d’ostracodes d’eau douce ont été identifiées à partir des sédiments de 43 lacs répartis dans huit îles de l’archipel Arctique canadien. Aucun ostracode n’a été décelé dans les sédiments de près de la moitié des lacs, et la plupart ont été trouvés dans des lieux ayant un taux d’alcalinité plus élevé. Plusieurs taxons endémiques aux régions de l’Arctique se retrouvent à la grandeur de l’archipel Arctique, dont le Candona rectangulata Alm, le Limnocythere liporeticulata Delorme et le Tonnacypris glacialis Sars. Les répartitions de Cytherissa lacustris Sars, de Cyclocypris globosa Sars, de Limnocythere sappaensis Staplin et de Limnocythere (Limnocytherina) camera Delorme sont plus restreintes, ce qui est attribuable aux différences sur le plan de la composition et des concentrations en ions.