✦ LIBER ✦

Phytoplankton and Primary Production of Lakes in the Matamek Watershed, Quebec

✍ Scribed by L. L. Janus; H. C. Duthie

Publisher: John Wiley and Sons
Year: 1979
Tongue: English
Weight: 573 KB
Volume: 64
Category: Article
ISSN: 1434-2944
DOI: 10.1002/iroh.19790640108

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

The productivity of three Shield lakes on Quebec's North Shore was found to be comparable with that of the most oligotrophic lakes known. Factors contributing to this condition may be that the moderately sized lakes of this study are deep relative to their surface areas, highly stained by humic substances, of very low conductivity, and contain little dissolved CO~2~. Standing crops of phytoplankton are very low, never exceeding 600 mg/m^3^. Chrysophyceae are dominant over all other classes of algae in both biomass and numbers, comprising approximately 50% of the fresh weight throughout the season. The abundance of micro‐flagellates implies a large surface area to volume ratio and the ability to move are an advantage in a nutrient poor environment. Much of the phytoplankton present may grow heterotrophically and energy additions from the terrestrial environment may be extremely important to the productivity of northern lakes when photosynthetic production is not significant.

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