Abstract
The submerged aquatic vegetation of 17 Norwegian lakes is described and related to the environmental impacts that result from hydro-electric power (HEP) use of these lakes. Largely based upon physiognomical features, three main community types are discerned. These are denoted as (a) shallow-water, (b) mid-depth, and (c) deep-water community, respectively. The aquatic macrophytes are classified into a plant strategy framework. This classification suggests that these macrophytes frequently exhibit combined traits of the ‘S’ (stress-tolerating), ‘R’ (ruderal), and ‘C’ (competitive) strategies. A plant-strategy index for the lakes is derived from the species classification and related to their HEP use.
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