question_answer 55)

  What could be the possible explanation for greater vulnerability of amphibians to extinction as compared to other animal groups?

Answer:

                  Amphibians are more vulnerable to extinction (i) Habitat Modification or Destruction Amphibians generally need aquatic and terrestrial habitats to survive; threats to either habitat can affect populations. Hence, amphibians may be-more vulnerable to habitat modification than organisms that require only one habitat type. (ii) Habitat Fragmentation This means isolation of a few areas by habitat modification. Small populations that survive within such fragments are often susceptible to inbreeding, genetic drift or extinction due to small fluctuations in the environment. (iii) Large Scale Climate Changes These changes can further modify aquatic habitats, preventing amphibians from spawning.