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प्रश्न
Why does the increased level of nutrients in the water affect the survival of aquatic organisms?
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उत्तर
An increase in the level of nutrients in a water body leads to an excessive increase in the population of algae in the water body. When these algae die, they serve as food for decomposers. A lot of oxygen is utilised in this process, consequently leading to a decrease in the level of oxygen dissolved in the water body. This in turn causes fishes and other aquatic organisms to die.
संबंधित प्रश्न
The activities of man had adverse effects on all forms of living organisms in the biosphere. Unlimited exploitation of nature by man disturbed the delicate ecological balance between the living and non-living components of the biosphere. The unfavourable conditions created by man himself threatened the survival not only of himself but also of the entire living organisms on the mother earth. One of your classmates is an active member of 'Eco club' of your school which is creating environmental awareness amongst the school students, spreading the same in the society and also working hard for preventing environmental degradation of the surroundings
List two values exhibited by your classmate who is an active member of Eco-club of your school.
Give one example each from your daily life where the domestic waste can be effectively reused and recycled.
What are the different ways in which water gets contaminated?
Why is forest considered a natural ecosystem?
The three R's which can help us to conserve natural resources for long term use are ______
The use of one of the following is eco-friendly. This one is :
(a) cars for transportation
(b) polybags for shopping
(c) windmills for generating power
(d) dyes for colouring clothes
List five things you have done over the last one week to −
increase the pressure on our natural resources
Expand the abbreviation GAP.
The government launched the ‘Ganga Action Plan’ (GAP) project in 1985. The main purpose of this project was to ______
The pH of water sample collected from a river was found to be acidic in the range of 3.5 – 4.5, on the banks of the river were several factories that were discharging effluents into the river. The effluents of which one of the following factories is the most likely cause for lowering the pH of river water?
