Retention tree (jättöpuu, säästöpuu)
Retention tree is a tree left permanently standing in connection with regeneration felling; their purpose is to promote biodiversity. Retention trees are often left standing in a group. In sustainable forestry, as in Finland, the growth of a new forest must always be ensured after clearcutting. According to PEFC-certification, 5–10 trees are left permanently standing in connection with clear felling.