Glossary - N

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Native: A species which is thought to have reached Britain since the ice age without the aid of man.
Native species: Species that have arrived and inhabited an area naturally, without deliberate assistance by man. For trees and shrubs in the United Kingdom usually taken to mean those present after post-glacial recolonisation and before historic times. Some species are only native in particular regions – hence locally native.
Native woodland: Woodland composed wholly or mainly of species that colonised after the last Ice Age and before human influence on natural processes became significant.
Natural regeneration: Young seedlings that have arisen from seed falling from trees nearby, either as a direct response to specific forest management, or by natural seeding. Very often just referred to as 'regeneration' but technically this includes artificial regeneration as well, i.e. planting.
Naturalised: An introduced tree or plant that now regenerates naturally and is widespread.
New planting: Establishing woodland on ground that was not woodland in the recent past.
Non-market benefits or costs: Benefits or costs that cannot be bought or sold in conventional markets.
Nurse: A tree species in a mixture that is planted to protect, or enhance the growth of, a more sensitive species intended to form the final crop, e.g. pine nursing oak or larch nursing beech. The nurse crop is usually removed during the early thinning stage.