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

• Main Author: John F. Tibbsl
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Arctic
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.559.1358; http://pubs.aina.ucalgary.ca/arctic/Arctic20-4-247.pdf

ABSTRACT. 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. RÉSUMÉ. Notes sur quelques protozoaires planctoniens recueillis sur le trajet de la station flottante ARLIS I, 1960-61. L'auteur discute de la. distribution géogra-phique 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