METHODS OF SEED DISPERSAL
DISPERSAL BY WIND:
Seeds and Fruits which are very light, tiny and dry can be dispersed by wind. Usually these seeds or fruits possess wings or hair to float/glide through air. Eg.
DISPERSAL BY WATER
· Many aquatic and some terrestrial plants use seed dispersal through water.
· Seeds can travel for extremely long distances, depending on the specific mode of water dispersal.
· This especially applies to fruits which are waterproof and float.
· Mangrove trees grow directly out of the water; when their seeds ripe, they fall from the tree and grow roots as soon as they touch any kind of soil.
· Other Examples are coconut, Lotus, Hydrilla.
WATER LILY PALM
DISPERSAL BY ANIMALS
· Animals can disperse plant seeds. Seeds that have sticky mucus, or a variety of hooks, spines usually disperse through this process.
· The stiff hair on the seeds sticks to animal fur.
· The small hooks on the surface of a bur enable attachment to animal fur for dispersion.
· Some Animals consume fruits and the undigested seeds are passed out along with the waste the body throws out.
DISPERSAL BY EXPLOSION
· In certain plants the fruit burst or explode.
· Eg. Cucumber, peas, beans and other legumes.