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Question

Answer the following:

a. What are the effects of icreased population on ecosystem?

b. How is urbanization responsible for destruction of ecosystem?

c. What are the reasons for war?

d. Explain the interactions among the factors of an ecosystem.

e. Differentiate between evergreen forests and grasslands.

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Solution

a. The population is increasing at an alarming rate and our natural resources are being used even at a faster rate. Increasing population has also lead to various devastating effects on our ecosystem as well. Increasing population has resulted in various problems like:

  • Deforestation- Cutting down of trees for making space for more houses and other products has resulted in the decrease in the forest cover.
  • Generation of waste- Increased population has resulted in the increased dumping of wastes by humans on earth. This waste has led to various types of pollution as most of it contains non biodegradable substances.
  • Land degradation- Excessive use of fertilisers, pesticides and intensive farming has led to over exploitation of natural resources like land and water.
  • Loss of biodiversity- Excessive minning, hunting of animals and cutting of trees has resulted in the loss of biodiversity of various regions. It has caused many animals and plants to become extinct.
  • Industrialisation- More and more industries are being set up for which large areas of land are being cleared out and they are also one of the major sources of pollution.


b. Urbanisation is a term which refers to the general increase in population and the amount of industrialization of a settlement. Urbanisation leads to various problems like land insecurity, worsening water quality, excessive air pollution, noise and the problems of waste disposal.

c. Wars can occur due to various reasons like differences and competition over land, water, mineral resources. It can also occur due to economic and political reasons.

d. Ecosystem is made up of two types of components - biotic and abiotic components. Abiotic factors include light, temperature, water, air, soil, inorganic nutrients, etc. They are the non-living components of any habitat. Biotic factors are the living components of any habitat. They include plants, animals, etc. Both the biotic and abiotic factors in an ecosystem interact with each to maintain the balance of an ecosystem. The abiotic factors play an important role in the distribution and survival of biotic factors in an ecosystem. The proportion of abiotic factors is not constant and always keeps on changing as they are used or excreted by the biotic factors. It is not only the abiotic factor which affects an ecosystem but the biotic factors also have an equal effect on abiotic components as well as other biotic components.

e.

Evergreen Forests
Grasslands

These land biomes are found in regions with surplous rains.
These land biomes are found in regions with long summers and limited rainfall.

They consiste of dense and multi layers of different types of trees.
They mainly consist of long grasses.

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