This type of forest is about 30% of forests throughout the country. Can be divided out again 4 types as follows:
.- tropical evergreen forest (Tropical Evergreen Forest) is a forest in the field with the monsoon wind is almost throughout the year, minimal quantity rainfall. Soil moisture content at all times. Based both in the plains and a tall mountain.Broken down according to the condition of moisture and the height of the topography, as follows:
.- tropical rain forest (Tropical Rain Forest) this species commonly called evergreen forest is available to the general in all sectors of the country and the most eastern coast Such as, Rayong, Chanthaburi and southern, which rainfall fell more than any other sectorMany plants contain several hundred kinds. Most tree is a family rubber with tall stem from 30-50 meters. The church consists of a dense forest and shrub palm rattan vine
.- evergreen forest (Dry Evergreen Forest) is common in various sectors of the country as smooth or along the valley. With a height of above sea level, about 500 meters and rainfall between 1 000-1 500,,.Important species such as rubber red, AfZELIA xylocarpa. Forest floor will not dense and relatively bare
- evergreen forest (Hill Evergreen. Forest) is a forest is high above sea level, since 1000 meters above, mainly on the high mountains in the north. And somewhere in central and northeastern region, i.e., Thung salaeng Luang, Phitsanulok และเพชรบูรณ์. Rainfall between 1 000-2 000,,.The wood family plant construction, such as construction of stumps, built pig eyes, cinnamon, tiger, etc. sometimes have him up to associate. The wood floor is the fern, terrestrial moss. This species is usually the headwater stream
.- pine (Coniferous Forest) pine forest are scattered patches, such as the northern province, Mae Hong Son, Lampang, Phetchabun and northeastern provinces. Sisaket, Surin and Ubon Ratchathani.200 meters or above. Sometimes found mixed with evergreen and deciduous forest. Pine tree grows in fertile land, such as mountain ridge is quite dry. Thailand has him only 2 type only is two leaves and pine fir. And they committed.Plant floor there are various grass
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- swamp (Swamp Forest) is the forest is as plain water is trapped and always along the sea shore with mud all over. The annual rainfall is less than, 2 000 mm per year. Is divided into small, 2 type is
.- the swamp or freshwater swamp forest (Fresh Water Swamp Forest) forests of this type, next to the coast. A flood or wet all year round. The soil is often the sand or mud plants depends on such as Samrong light shift water Tembusu, etc.!- mangrove (Mangrove Swamp Forest) this species depends on the coast with mud and flood waters, for example, along the west coast from Ranong stool bar to Gulf since Samut songkhram to trad. And from Khan to Narathiwat.Mangrove Rhizophora apiculata, wood big cirle, etc.!
.- sylvan Beach (Beach Forest) is existing forest along the coast is the soil gravel. The sand and rocks are different species flood. If the coast sandy soils have the sea Plant downstairs a tin NOK and relationship to other climbers
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