http://walthamstow.london/News/elevations-up-to-the-tree-line-except-where-natural-fire-frequency-is-too-high/ or where the tree growing environment was impaired by natural processes or humans. Forests sometimes contain many tree species in a small place (e.g. tropical rain and temperate deciduous forests), but other forest types have Comparatively few species over large regions (e.g. taiga and arid montane coniferous forests). As a general rule, woods dominated by angiosperms are species-abund Sat, 29 Oct 2016 06:32:58 UTC en