On Some Planktonic Protozoa Taken from the Track of the Drift Station ARLIS I, 1960-61

Twenty-six species of protozoans identified from ARLIS I plankton collections are discussed with respect to their geographic and depth distribution. Diversity of species and abundance of organisms were both greater in the eastern than in the western collections. Plankton was generally sparse in the...

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Bibliographic Details
Published in:ARCTIC
Main Author: Tibbs, John F.
Format: Article in Journal/Newspaper
Language:English
Published: The Arctic Institute of North America 1967
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Online Access:https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66349
Description
Summary:Twenty-six species of protozoans identified from ARLIS I plankton collections are discussed with respect to their geographic and depth distribution. Diversity of species and abundance of organisms were both greater in the eastern than in the western collections. Plankton was generally sparse in the upper 30 m. of water. The greatest abundance of plankton was at depths of about 70 m. and about 400 m., both regions of temperature maxima. The common protozoa were present in both depth zones. It is suggested that some of the phytoplankton are maintained through the dark season by heterotrophic means. The luminescence of Noctiluca was noted to be of a shade of blue different from that of the metazoans collected. Notes sur quelques protozoaires planctoniens recueillis sur le trajet de la station flottante ARLIS I, 1960-61. L'auteur discute de la distribution géographique et bathymétrique de vingt-six espèces de protozoaires identifiées dans les récoltes de plancton d'ARLIS I. Les récoltes orientales présentaient une plus grande diversité des espèces et une plus grande abondance d'organismes que les récoltes occidentales. Le plancton était généralement rare dans les premiers 30 m d'eau: il était le plus abondant à des profondeurs d'environ 70 m et 400 m, qui sont des niveaux de température maximum. Les protozoaires communs étaient présents dans les deux zones. L'auteur suppose qu'un peu de phytoplancton survit à la nuit polaire par des moyens hétérotrophes. On a noté que la luminescence de Noctiluca était d'une nuance bleue différente de celle des métazoaires récoltés.