Woodlands are a category of vegetation differing from forests and rainforests by the spacing and crown cover of the component trees. In the dry woodland and savanna systems of Australia, spacing of trees is highly dependent on precipitation. These ecotypes contain very high biodiversity and the woodland-savanna systems of southwestern Western Australia is considered a global biodiversity hotspot. For example, in the Swan Coastal Plain region is estimated to contain 8,000 plant species, three quarters of which are endemic.
Australia and New Zealand - Woodland Savanna