Factors that influence a region’s photosynthetic productivity
Amount of solar radiation
Nutrient concentrations
At high latitudes
Hours of sunlight varies greatly with season
Sunlight limiting factor of 1 degree productivity
At low latitudes
Hours of sunlight are constant
Nutrients are a limiting factor of 1 degree productivity
At mid latitudes
Sunlight varies with season
Food chain
Passage of energy along a single path
Food web
Multiple paths of energy transfer