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New Guinea plants

from left to right: Orchids and mushroom.

Some plants like it cool, cloudy and foggy

Bryophytes stand out from other plants described so far as being non-vascular, and neither flowering nor producing seeds. These small plants reach their greatest diversity in tropical rainforests.

They are particularly diverse and abundant in the mid-to-upper montane forests, before declining again with higher elevations. Many of them are unique to New Guinea, where they are particularly fond of areas dominated by beech (Nothofagus species).2

Trees with million-year histories

In New Guinea, you can still find remnants of most plants of Gondwanaland, a ‘super-continent’ which more than 100 million years ago included most of the landmasses that make up Australia, New Guinea, Antarctica, South America, Africa, Madagascar, India, Arabia and New Zealand.3

How New Guinea’s plant life evolved

After the Australia-New Guinea continental plate broke off from Gondwanaland, it remained isolated for millions of years, preventing the invasion of foreign species. When the larger parts of New Guinea reached their current position about 10 million years ago, the island was in close proximity to others, which made possible the migration of Asian plants.

The plants we see today in New Guinea are predominantly Asian in origin, especially in the lowlands. In montane forests however, the climate favoured the evolution of new species.

Intense volcanic activity, which boomed until 200,000 years ago, resulted in the formation of rich soils at higher altitudes, which also promoted speciation.4

A closer look at…

The ant benefit

The root systems of epiphytes often host ant nests. Ants gather nutritive minerals that are taken up as food by the epiphytes.

1 Wikipedia. Gwondaland. Accessed 12/01/2006.
2 Muller K. 2004. The Biodiversity in New Guinea. Unpublished document.
3 Wikipedia. Gwondaland. Accessed 12/01/2006.
4 Muller K. 2004. The Biodiversity in New Guinea. Unpublished document.