Question

Why is dispersal of seed nessesary

Answer 1

Answer:

Dispersal of seeds is very important for the survival of plant species. If plants grow too closely together, they have to compete for light, water and nutrients from the soil. Seed dispersal allows plants to spread out from a wide area and avoid competing with one another for the same resources. (i) Seed dispersal prevents the overcrowding of plants in an area. (ii) Seed dispersal prevents the competition for water, minerals and sunlight among the same kind of plants. (iii) Seed dispersal helps the plants to grow in new places (or new habitats) for wider distribution. The dispersal of seeds allows them to reach specific habitats that are favourable for their survival. If seeds are not dispersed, they will grow very close to the parent plant. This way they will not get adequate amount of sunlight, water and nutrients from the soil. Seed dispersal can be advantageous (1) in escape from density-or distance-dependent seed and seedling mortality, (2) by colonization of suitable sites unpredictable in space and time, and (3) by directed dispersal to particular sites with a relatively high probability of survival.

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