A total of 40 to 75% of all species on the world's habitats are indigenous to the rainforests.It has been estimated that many millions of species of plants, insects, and microorganisms are still undiscovered. Tropical rainforests have been called the "jewels of the Earth", and the "world's largest pharmacy", because over one quarter of natural medicines have been discovered there.Rainforests are also responsible for 28% of the world's oxygen turn over, often misunderstood as oxygen production,[3] processing it through photosynthesis from carbon dioxide and storing it as carbon through biosequestration.
The undergrowth in a rainforest is restricted in many areas by the lack of sunlight at ground level. This makes it possible to walk through the forest. If the leaf canopy is destroyed or thinned, the ground beneath is soon colonized by a dense, tangled growth of vines, shrubs, and small trees called a jungle. There are two types of rainforest, tropical rainforest and temperate rainforest.
Jungle Mushroom found in Khaolak area .
Sri Phangnga National Park approx. 50 km. north east from Khaolak .
The park lies in Kura Buri and Takua Pa districts of Pang Nga province, next to Khao Sok national park in Surat Thani province. It became the 56th national park of Thailand on 16 April 1988 covering an area of 246 square kilometers.
The park is the ranges of hills parallel to Andaman Sea coast. These hills are the head water of many river streams. Like other places in the southern Thailand (which is sandwished between Andaman sea on the west and Gulf of Thailand on the east) the rainy season in this area lasts from May till December. January to April could be named warm season. There are many streams, waterfalls and cliffs in the park.
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