The Lake Langvatn fertilization experiment: Introduction

Abstract

The limnology of Langvatn situated in Trøndelag county in Central Norway, has been studied for five years (1974–1978). In two years, 1975 and 1976, the lake was fertilized with a general fertilizer to change feeding conditions for the fish food organisms. Reasons for the choice of the lake are described together with a brief description of the lake itself, its catchment area, location, geological origin and the effect of human influence.