What is an algal bloom?

What are algal blooms? How are they formed? Give two harmful effects of formation of algal blooms in an aquatic body.

A factory drains its waste water into the nearly lake. It has caused algal bloom. (a) How was the algal bloom caused ? (b) What would be the consequences ? (c) Name the phenomenon that caused it .

A factory drains its waste water into the nearly lake. It has caused algal bloom. (a) How was the algal bloom caused ? (b) What would be the consequences ? (c) Name the phenomenon that caused it .

How does an algal bloom cause eutrophication of a water body? Name the weed that can grow in such a eutrophic lake.

How does an algal bloom cause eutrophication of a water body? Name the weed that can grow in such a eutrophic lake.

Which of the following statements is not correct regarding algal blooms ?

Cyanobacteria are used in agricultural fields for crop improvement because they cause 1.N 2 fixation 2.algal blooms 3.photosynthesis 4.all of these

Name and define the environment related terms: (a) DDT accumulated in a three step food chain will be maximum in secondary consumer. (b) Pertaining to causing algal bloom.

The given graphs shows the productivity of an aquatic ecosystem measured in terms of dissolved oxygen produced and consumed by green plants and photosynthetic algae where PS=photosynthesis and R=respiration. What will happen during algal bloom? 1. PS will be increase, R will be decreased 2. PS will be decreased, R will be increased. 3. PS and R will not change. 4. PS+R will increase.

Read the following statements carefully and find the incorrect statements: A. More than 1 percent impurities make domestic sewage unfit for human use. B. Less BOD causes mortality of fish and other aquatic creatures. C. Presence of large amounts of nutrients in water also causes excessive growth of planktonic algae, called an algal bloom. D. Algai bloom causes deterioration of the water quality an decreases fish mortality. E. Some bloom-forming algae are extremely toxic to human beings and animals. F. Eichhornia crassipies is the world's most problematic aquatic weed.