Editing Biome (section)

=== Holdridge (1947, 1964) life zones ===
[[Image:Lifezones Pengo.svg|thumb|upright=2.3|Holdridge life zone classification scheme. Although conceived as three-dimensional by its originator, it is usually shown as a two-dimensional array of hexagons in a triangular frame.]]
{{Main|Holdridge life zones}}
In 1947, the American botanist and climatologist [[Leslie Holdridge]] classified climates based on the biological effects of temperature and [[rainfall]] on [[vegetation]] under the assumption that these two [[abiotic]] factors are the largest determinants of the types of vegetation found in a habitat. Holdridge uses the four axes to define 30 so-called "humidity provinces", which are clearly visible in his diagram. While this scheme largely ignores soil and sun exposure, Holdridge acknowledged that these were important.