“When need turns to greed, it leads to biodiversity loss.” Substan

1.	“When need turns to greed, it leads to biodiversity loss.” Substantiate this statement by explaining two causes of biodiversity loss.
Answer» (i) Habitat loss and fragmentation: The degradation of many habitats by pollution affects the survival of many species. It results large habitats are broken up into small fragments. Amazon rain forest is cleared for cultivating soya beans or for conversion to grasslands for raising beef cattle (ii) Over-exploitation : It leads to the over exploitation of natural resources. For example the extinction of Steller’s sea cow, passenger pigeon was due to humans. (iii) Alien species invasions : The introduction of foreign species cause the reduction or extinction of indigenous species. The Nile perch introduced into Lake Victoria in east Africa led to the extinction of more than 200 species of cichlid fish in the lake (iv) Co-extinctions : If two species are in obligatory relationship the extinction of one species affect the other. Eg – coevolved plant-pollinator mutualism where extinction of one species leads to the extinction of the other.

“When need turns to greed, it leads to biodiversity loss.” Substantiate this statement by explaining two causes of biodiversity loss.

Answer»

(i) Habitat loss and fragmentation:

The degradation of many habitats by pollution affects the survival of many species. It results large habitats are broken up into small fragments.

Amazon rain forest is cleared for cultivating soya beans or for conversion to grasslands for raising beef cattle

(ii) Over-exploitation :

It leads to the over exploitation of natural resources.

For example the extinction of Steller’s sea cow, passenger pigeon was due to humans.

(iii) Alien species invasions : The introduction of foreign species cause the reduction or extinction of indigenous species. The Nile perch introduced into Lake Victoria in east Africa led to the extinction of more than 200 species of cichlid fish in the lake

(iv) Co-extinctions : If two species are in obligatory relationship the extinction of one species affect the other.

Eg – coevolved plant-pollinator mutualism where extinction of one species leads to the extinction of the other.

“When need turns to greed, it leads to biodiversity loss.” Substantiate this statement by explaining two causes of biodiversity loss.

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