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A. Distinguish between dispersal and migration. B. What is the primary reason why many species migrate?...

A. Distinguish between dispersal and migration.
B. What is the primary reason why many species migrate?
C. What different patterns of migration are found?

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Answer #1

Answer A) Dispersal is the movement of individuals or seeds to other site or spreading away from near ones from the original area. Dispersal can be active or passive dispersal.
There are three types of dispersal:
1. Uniform Dispersal- when there is equal separation.
2. Random dispersal- when there is no pattern of dispersal
3. Clumped dispersal - when the dispersion is in groups.

Migration is the movement of species form one place to another in large numbers. In migration every individual is taken and none is left behind.

Answer B) There are many different reasons for migration.
Few migrants migrate to short distances in search of food and better living conditions.
Some migrate for breeding.
Some migrate to escape form harsh environmental conditions. Some migrate to be safe from prey.

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