Home
Class 12
BIOLOGY
Why, in recent years, is there a sharp i...

Why, in recent years, is there a sharp increase in the frequency and magnitude of algal blooms in fresh as well as coastal waters?

Text Solution

Verified by Experts

The sharp increase in the frequency and magnitude of blooms of algae, dinoflagellates, cyanobacteria and marine plankton is due to addtion of large quantities of nutrients entering waterbodies and inland rivers from runoff of fertilisers, animal manure, domestic wastes, poultry wastes and animal wastes. These being rich in nitrogen and phosphorus promote excessive growth of algae, called algal bloom.
Promotional Banner

Topper's Solved these Questions

  • ENVIRONMENTAL ISSUES

    ICSE|Exercise PRACTICE QUESTIONS (VERY SHORT ANSWER TYPE QUESTIONS)|27 Videos

  • ENVIRONMENTAL ISSUES

    ICSE|Exercise PRACTICE QUESTIONS (SHORT ANSWER TYPE-I QUESTIONS)|6 Videos

  • ECOSYSTEMS

    ICSE|Exercise COMPETITION CORNER (ASSERTION AND REASON TYPE QUESTIONS (FOR AIIMS ASPIRANTS))|14 Videos

  • EVOLUTION

    ICSE|Exercise COMPETITION CORNER (Assertion and Reason Type Questions (For AIIMS aspirants))|26 Videos

Similar Questions

Explore conceptually related problems

Algal blooms in water bodies cause

How do algal blooms affect the life in water bodies

Why is it easier to swim in sea water than in fresh water?

Algal blooms impart a distinct colour to water due to

Algal blooms impart a distinct colour to water due to

Algal blooms impart a distinct colour to water due to

Explain why water is a Lewis as well as Bronsted base

Tioga Road is a mountain pass that crosses the Sierra nevada through northern Yosemite National Park. The road is closed from about November through late May. This time period can change depending on the quantity and nature of the season's snowfall, as well as unforeseen obstacles such as fallen trees or rocks. The scatterplot above compares the snowpack water content on April 1 (for year 1981-2014) as a percent of the historical average to the time it takes th National Park Service to fully clear the road and open it to traffic. For every 5 percent increases in snowpack water content, how many more days does it take the National Park Service to clear Tioga Road ?

Why is adsorption accompanied by the decrease of both enthalpy as well as entropy of the system? Which factors help in increasing the extent of physical adsorption of the gas on charcoal powder?

A parallel -plate capacitor having plate area 400 cm ^2 and separation between the plate 1.0mm is connected to a power supply of 100V. A dielectric slab of thickness1.0mm and dielectric constant 5.0 is inserted into the gap .(a)Find the increase in electrostatic energy .(b) If the power supply is now disconnected and the dielectric slab is taken out , find the further increase in energy. (c) Why does the energy increase in inserting the slab as well as in taking it out?