Question

can anybody explain what is colonisation and succession

Answer 1

Colonisation: The arrival of organisms to live, reproduceand take over the new habitat
succession : Communities are not stable. New species arrive and other species die off locally. Some species (like dandelion) are better at colonizing bare soil enabling others to live in their shade (and retained moisture). Some species (like maples) grow better as understory trees until they reach larger sizes. Trees sold in garden shops and plant nurseries often have their trunks wrapped to protect them from sunburn because they ordinarily grow in the shade of larger trees.