Climate Although no rain gauge exists on the mountain, data at nearby
Mount Bellenden Ker suggest an annual average rainfall of around , and an estimated potential maximum as high as , both of which would make the mountain one of the wettest places in the world. Even in what constitutes the "dry" in most of tropical Australia, rainfall on the summit is very heavy at around in May and in August, whilst in the wettest month of March estimated averages are as high as and maxima around . Calculations based on available lowland data (from
Innisfail,
Cairns and
Port Douglas) would suggest
daily rainfalls could have been potentially as high as during a
cyclone in 1911 – which if accurate would be the highest daily rainfall in the world.
Vegetation '', a palm species on Mount Bartle Frere The high elevation and rainfall of the mountain create conditions for a number of vegetation types growing on the poor granitic soils. The lower slopes support lowland tropical rainforest (complex mesophyll vine forest) with a great diversity of large leaved trees, climbers, epiphytes, palms and ferns. With increasing elevation the rainforest changes to a less diverse smaller leaved notophyll type. At elevations above 1000 m, simple microphyll vine fern forest is found with species such as the purple kauri pine (
Agathis atropurpurea),
Elaeocarpus ferruginiflora and pimple bark (
Balanops australiana). With further increases in elevation, increasing exposure and cloud contact create conditions ideal for the formation of
cloud forest (simple microphyll vine fern thicket); many of the species are rare or endemic and most trees are shrouded in mosses and other
bryophytes. The stunted tree
Eucryphia wilkiei found in the cloud forest above 1500 m elevation on Mount Bartle Frere exists nowhere else on earth and has relatives in the cool temperate rainforests of
Tasmania and
Chile. Other notable species include the mountain aspen
Acronychia chooreechillum,
Trochocarpa bellendenkerensis,
Polyscias bellendenkerensis, the vine
Parsonsia bartlensis and Australia's only native
rhododendron,
Rhododendron lochiae, which grows on top of the large granite boulders or as an
epiphyte in the cloud forest canopy.
Eidothea zoexylocarya was initially discovered on the slopes of Mount Bartle Frere, which holds its main populations. In some areas near the summit the granitic soil is so leached of nutrients by the very high rainfall that rainforest plants are replaced by heath plants such as
Acrothamnus spathaceus,
Acrotriche baileyana, ferns, (
Gleichenia species), carnivorous sundews (
Drosera species) and the
orchid,
Dipodium ensifolium.
Fauna The
Bartle Frere skink (
Techmarscincus jigurru), an endangered species of lizard, is found on the slopes of Mount Bartle Frere and surrounding peaks above . Mount Bartle Frere is commemorated in the scientific names of two other species of lizards found on the mountain,
Bellatorias frerei and
Concinnia frerei. The mountain lies in the
Wooroonooran Important Bird Area, identified as such by
BirdLife International because it supports populations of a range of bird species endemic to
Queensland's Wet Tropics. ==See also==