INCREASED 
NUTRIENT INPUTS 
INCREASED 
NUTRIENTS 
IN WATER COLUMN 
INCREASED 
ALGAL GROWTH 
IN WATER COLUMN 
DECREASED CLARITY AND 
INCREASED PARTICULATE ORGANIC 
LEVELS IN WATER COLUMN 
SETTLING OF PARTICULATE ORGANIC 
MATERIAL TO DEEP WATER 
DECAY OF PARTICULATE ORGANIC 
MATERIAL AND DECREASE IN 
OXYGEN LEVELS 
IN DEEP WATER 
Figure 2. Scheme of possible effects of enrichment in a 
stratified water column. 
72 
