Colloque

The Dual Nature of Lake St. Louis

John K. Brundritt

Membre a labase

John K. Brundritt

Résumé du colloque

In the shallow basin of Lake St. Louis, waters derived from the St. Lawrence and Ottawa Rivers remain essentially separate, and readily distinguishable by marked colour differences. The extents of two water systems if the lake are delineated. During the summer of 1962, weekly hydrographic observations, and bi-weekly plankton and silt-bottom samples, were taken at comparative stations. No thermocline was established in either water mass, and vertical mixing was nearly complete in St. Lawrence water. A long phytoplankton bloom in Ottawa water did not appear in the St. Lawrence surface plankton, which was dominated by Cladocera and copepods.