The following is a list of ecoregion

Ecoregion

An ecoregion , sometimes called a bioregion, is an ecologically and geographically defined area that is smaller than an ecozone and larger than an ecosystem. Ecoregions cover relatively large areas of land or water, and contain characteristic, geographically distinct assemblages of natural...

s in Yemen

Yemen

The Republic of Yemen , commonly known as Yemen , is a country located in the Middle East, occupying the southwestern to southern end of the Arabian Peninsula. It is bordered by Saudi Arabia to the north, the Red Sea to the west, and Oman to the east....

, as identified by the Worldwide Fund for Nature (WWF).

Terrestrial ecoregions

Yemen lies on the boundary between two of the world's terrestrial ecozone

Ecozone

An ecozone is the broadest biogeographic division of the Earth's land surface, based on distributional patterns of terrestrial organisms.Ecozones delineate large areas of the Earth's surface within which organisms have been evolving in relative isolation over long periods of time, separated from...

s. The Afrotropic

Afrotropic

The Afrotropic is one of the Earth's eight ecozones. It includes Africa south of the Sahara Desert, the southern and eastern fringes of the Arabian Peninsula, the island of Madagascar, southern Iran and extreme southwestern Pakistan, and the islands of the western Indian Ocean. It was formerly...

 ecozone covers the mountainous southern and eastern fringe of the Arabian Peninsula as well as Sub-Saharan Africa

Sub-Saharan Africa

Sub-Saharan Africa as a geographical term refers to the area of the African continent which lies south of the Sahara. A political definition of Sub-Saharan Africa, instead, covers all African countries which are fully or partially located south of the Sahara...

 and Madagascar

Madagascar

The Republic of Madagascar is an island country located in the Indian Ocean off the southeastern coast of Africa...

. The Palearctic

Palearctic

The Palearctic or Palaearctic is one of the eight ecozones dividing the Earth's surface.Physically, the Palearctic is the largest ecozone...

 ecozone covers the rest of the Arabian Peninsula as well as temperate Eurasia

Eurasia

Eurasia is a continent or supercontinent comprising the traditional continents of Europe and Asia ; covering about 52,990,000 km2 or about 10.6% of the Earth's surface located primarily in the eastern and northern hemispheres...

 and Northern Africa.

Deserts and xeric shrublands

Deserts and xeric shrublands

Deserts and xeric shrublands is a biome characterized by, relating to, or requiring only a small amount of moisture.-Definition and occurrence:...

• Arabian Desert and East Sahero-Arabian xeric shrublands (Palearctic)
• Arabian Peninsula coastal fog desert
  Arabian Peninsula coastal fog desert
  The Arabian Peninsula coastal fog desert on the southern coasts of the Arabian peninsula is an ecoregion which experiences thick fogs where visibility may be reduced to 33 feet . It is classed as a Afrotropic fog desert -Location and description:...
  
   (Afrotropic)
• Red Sea Nubo-Sindian tropical desert and semi-desert (Palearctic)
• Socotra Island xeric shrublands (Afrotropic)
• Southwestern Arabian foothills savanna (Afrotropic)
• Southwestern Arabian montane woodlands
  Southwestern Arabian montane woodlands
  The Southwestern Arabian montane woodlands is a xeric woodland ecoregion of the Arabian Peninsula.-Setting:The ecoregion covers an area of , lying above 2000 meters elevations in the Asir Mountains of southwestern Saudi Arabia and the Western Highlands of Yemen.-Flora:The flora changes with elevation...
  
  (Afrotropic)