The Yunnan Plateau subtropical evergreen forests is an endangered

ecoregion An ecoregion (ecological region) or ecozone (ecological zone) is an ecologically and geographically defined area that is smaller than a bioregion, which in turn is smaller than a biogeographic realm. Ecoregions cover relatively large areas of ...

southwestern The points of the compass are a set of horizontal, radially arrayed compass directions (or azimuths) used in navigation and cartography. A compass rose is primarily composed of four cardinal directions—north, east, south, and west—each sepa ...

China. These forests once covered the western parts of the Yungui Plateau but have been significantly reduced and replaced with agricultural land uses. The Yunnan evergreen forests and the neighbouring Guizhou Plateau broadleaf and mixed forests are the only two ecoregions in the

Palearctic realm The Palearctic or Palaearctic is the largest of the eight biogeographic realms of the Earth. It stretches across all of Eurasia north of the foothills of the Himalayas, and North Africa. The realm consists of several bioregions: the Euro-Sib ...

to be classified as part of

tropical and subtropical moist broadleaf forests Tropical and subtropical moist broadleaf forests (TSMF), also known as tropical moist forest, is a subtropical and tropical forest habitat type defined by the World Wide Fund for Nature. Description TSMF is generally found in large, discon ...

biome A biome () is a biogeographical unit consisting of a biological community that has formed in response to the physical environment in which they are found and a shared regional climate. Biomes may span more than one continent. Biome is a broader ...

Description

Territory that was once covered by the Yunnan Plateau subtropical evergreen forests includes most of the western Yungui Plateau which makes up the eastern half of

Yunnan Yunnan , () is a landlocked province in the southwest of the People's Republic of China. The province spans approximately and has a population of 48.3 million (as of 2018). The capital of the province is Kunming. The province borders the C ...

as well as parts of southern

Sichuan Sichuan (; zh, c=, labels=no, ; zh, p=Sìchuān; alternatively romanized as Szechuan or Szechwan; formerly also referred to as "West China" or "Western China" by Protestant missions) is a province in Southwest China occupying most of the ...

, western

Guizhou Guizhou (; formerly Kweichow) is a landlocked province in the southwest region of the People's Republic of China. Its capital and largest city is Guiyang, in the center of the province. Guizhou borders the autonomous region of Guangxi to the ...

, and northwestern Guangxi. The Yungui Plateau is relatively flatter here and human agricultural development has greatly reduced the extent of the Yunnan Plateau evergreen forests. In some areas of the ecoregion, rice production has reached altitudes of nearly , the highest anywhere in the world.

Climate

This region experiences a mild climate as the high altitude and low latitude negate many of the extreme effects of either climatic feature.

Flora

Today, forest remnants are isolated along mountain ridges, karst hills, and steeper valleys where agriculture is not prevalent. Significant remaining tracts of the evergreen forests include Qinglongxia Scenic Area, the Cang Mountains, Mount Jizu, the Western Hills Forest Reserve, and the Ailao Mountain Nature Reserve. In other places in the ecoregion, the evergreen forests have been replaced by strands of dominating Yunnan pine. It is unclear to what extent Yunnan pine coexisted in the Yunnan Plateau subtropical evergreen forests prior to agricultural development in the region.

Fauna

Animal species that can be found in the Yunnan Plateau subtropical evergreen forests include black gibbons,

bamboo rat The bamboo rats are four species of rodents of the subfamily Rhizomyinae. They are the sole living representatives of the tribe Rhizomyini. All are found in South Asia, Southeast Asia and East Asia. The species are: *The Chinese bamboo rat, ''R ...

s, and

Asiatic black bear The Asian black bear (''Ursus thibetanus''), also known as the Asiatic black bear, moon bear and white-chested bear, is a medium-sized bear species In biology, a species is the basic unit of classification and a taxonomic rank of an or ...

s. A notable

extirpated Local extinction, also known as extirpation, refers to a species (or other taxon) of plant or animal that ceases to exist in a chosen geographic area of study, though it still exists elsewhere. Local extinctions are contrasted with global extinct ...

species is the

tiger The tiger (''Panthera tigris'') is the largest living cat species and a member of the genus ''Panthera''. It is most recognisable for its dark vertical stripes on orange fur with a white underside. An apex predator, it primarily preys on ...

References

{{reflist Ecoregions of China Palearctic ecoregions Tropical and subtropical moist broadleaf forests