According to 'The Vegetation of China' (Wu 1980), the ecosystem in this region is mainly composed of the following types: Rain Forest Ecosystems Monsoon Rain Forest Ecosystems - Evergreen monsoon rain forests - Semi-evergreen monsoon rain forests - Deciduous monsoon rain forests Evergreen Broad-leaved Forest Ecosystems Sclerophyllous Evergreen, Broad-leaved Forest Ecosystems Mixed Conifer and Broad-leaved Forest Ecosystems Evergreen Conifer Forest Ecosystems Deciduous Conifer Forest Ecosystems Evergreen Broad-leaved Bush Ecosystems Evergreen Coriaceous Bush Ecosystems Evergreen Conifer Bush Ecosystems Deciduous Broad-leaved Bush Ecosystems Meadow Ecosystems Steppe Ecosystems Desert Ecosystems Alpine Debris Sparse Ecosystems Super-alpine Glacier and Snow Ecosystems Aquatic Ecosystems Farming Ecosystems Bamboo Forest Ecosystems Species' Diversity The number of species on the earth is estimated to be from five to 30 million (Wilson 1988), but only about 1.4 to 1.7 million have been recorded.
(the ecosystem in this region; is mainly composed; of the following types) (Ecosystems Steppe Ecosystems Desert Ecosystems Alpine; to be; from five to 30 million) (only about 1.4 to 1.7 million; have been recorded; )
the ecosystem in this region Ecosystems Steppe Ecosystems Desert Ecosystems Alpine only about 1.4 to 1.7 million
is mainly composed to be have been recorded
of the following types
from five to 30 million