- Coniferous Forest & Shrubbery
- Coniferous Forest
Korean Fir Plant Community
Korean Fir Plant Communities, typifying subarctic plant communities in Jeju Island, are distributed around 1,400 m above sea level, surrounding Paekrokdam. The plants, co-inhabiting the forest with Clintonia udensis, Fragaria nipponica, are densely distributed at the northern areas of Hallasan.
- Azalea Plant Community
Azalea Plant Communities, distributed in zones where deciduous broadleaf forests and Korean fir plant communities perish, contain such indigenous plants as crowberry, Vaccinium uliginosum, Halla Siberian chrysanthemum. and Euphorbia fauriei.
- Shrubbery Zone
According to ancient references, a shrubbery zone is designated as an area 1600m above sea level at the north, and 1500m zone above sea level at the South.
Juniperus chinensis var. sargentii, crowberry flourish at the north of the shrubbery zone, which is typical of rocky areas and cave-ins. Ilex crenata, Ligustrum obtusifolium, Ligustrum obtusifolium, Cornus kousa are densely distributed around area of 1,400m∼1,600m above sea level. Azaleas and rhododendrons
are located at highlands of over 1,600 m above sea level. Korean firs are luxuriant around valley areas.
- Deciduous Forest
- Japanese Oak & Fauriel Plant Community
The Deciduous Broadleaf Forest is vertically distributed between indeciduous broadleaf forest and coniferous one. And Japaness oak and fauriel plant communities flourish at the lowest area of the deciduous broadleaf plant zone. The trees in this plant community coexist with Japanese Snowbell, Maple trees, Carpinus laxiflora, and cherry trees.
- Mongolian Oak Plant Community
The Mongolian Oak Plant Community is distributed at the highlands, 1,200 ~1,400 m above sea level. Trees in this zone flourish with Manshurian fullmoon maple and Mountain ash.
- Indeciduous Broadleaf Forest
The Indeciduous Broadleaf Forest is located across zones ranging from Jeju coastal areas to zones 900m above sea level. The zones are distributed in spots throughout the uninhabited islands and valley areas. Islands, located at the south of the Korean Peninsula and coastal areas at the South, lie in the subtropical zone. Jeju Island is relatively well protected and preserved compared to other areas in the zone. Donnaeko valley Cheonjiyeon and Cheonjeyeo valley are plant communities where primitive states are well preserved, and camphor trees and black oak trees flourish. Prunus yedoensis, one of the valuable indigenous plants in this zone, inhabit plant zones between indeciduous forests and deciduous ones, together at 400m～800m. Some of them are designated as precious national plants.
- Castanopsis cuspidata var. sieboldii Plant Community
The Castanopsis cuspidata var. sieboldii Plant Community, regarded as the dominant plants at the lowlands of Jeju Island, are formed around islets and Sanbangsan area. The zone is, in turn, divided by plant communities that accommodates, Daphniphyllum macropodum, and plant zones that contains Quercus glauca, Distylium racemosum, Cleyera japonica, areas that have Quercus acuta, Dendropanax morbifera.
- Quercus salicina and Quercus glauca Plant Community
Beech forests, where Quercus salicina, Quercus glauca flourish, are formed when primeval forests are destroyed at the wastelands that are covered with rocky features at the lowland, reducing the size of a plant community dramatically.
- Second Green Field
The green field of Hallasan is a second grassy field, pruned to pasture animals or secure arable areas. A second green field takes a long time to revert back to its primeval state once the primeval forest is destroyed. The size of the zone is comparatively large.
- Grass Zone
Grass zones, pruned to pasture animals, are distributed from coastal areas to highlands of over 1,500 m above sea level.
- Cogon (Alang Grass) Area
Cogon grass had long been used as material to make agricultural appliances and thatched roofs for houses. The zone flourishes due to the fact that cogon grass has not been frequently used for those purposes.
- Eulalia Zone
Eulalia, flourishing at volcanic mud zones, takes up most of the second green field.
- Coastal Vegetational Zone
Since Jeju Island is a volcanic island, the coastal areas are covered with rocky zones. For that reason, most of the vegetations are chasmophyte at this cavern area. Dune plants are infrequently detected at dunes.
- Coastal Chasmophyte Plant Community
The climate of the Chasmophyte plant community is rather hot and dry. Chasmophyte plants such as Cnidium japonicum and portulaca flourish in these areas.
- Coastal Dune Plant community
Coastal Dune areas display peculiar geographical conditions, hot weather, and frequent movements of sand. At the coastal areas, perennial plants such as Carex pumila, Calystegia soldanella, Wedelia prostrata, and Ixeris repens are densely distributed.
- Coastal Swamp Plant Community
Since not many rivers and streams are distributed in the Hallasan areas, sedimentary deposits are rarely accumulated across the island. Therefore, swampy plants zones are restricted to small swampy grounds near coastal areas. Carex scabrifolia and sea arrow grass plant zones densely inhabit beaches and coastal areas with sedimentary deposits.
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