Eutrophication in a water body leads to which of the following?

A. Bloom of algae

B. Increase in the level of dissolved oxygen (DO)

C. Increase in turbidity and odor of the water body

D. Difficulty in sustaining normal aquatic life

E. Deficiency of nutrients

Choose the correct answer from the options given below:

A, C and D only .

• Eutrophication is defined as an increase in nutrient input to surface waters to the extent of overenrichment, with a corresponding increase in primary productivity and related negative effects.

• Eutrophication is widely recognized as a serious, primarily human-caused (anthropogenic) environmental issue.

• The process of nutrient transport is explored starting with water as both a molecule and substance, and its passage over and through the landscape to aquatic systems.

• Two primary nutrient cycles, phosphorus (P) and nitrogen (N), are discussed with focus on anthropogenic perturbations and their cumulative effects.

• Consideration is given to states of ecological succession, natural and cultural eutrophication, fire, drought, and instances where increased nutrient loading does not result in eutrophication.

• Nutrient concentrations and ratios (N:P) are reviewed for their effects on phytoplankton growth and potential for cyanobacteria, capable of toxin production, to dominate phytoplankton communities.