The three most comprehensive biodiversity surveys of Phong Nha-Ke Bang National Park have recorded a high diversity of animal and plant species at the site, including a number endemic to the limestone karst massif.
The three most comprehensive biodiversity surveys of Phong Nha-Ke Bang National Park, together with the work of numerous other researchers, have recorded a high diversity of animal and plant species at the site, including a number endemic to the limestone karst massif.
The nature of the terrain at Phong Nha-Ke Bang National Park has restricted encroachment into limestone areas. As a result, the limestone karst is almost entirely forested, apart from steep cliff faces. The only clearance of forest has been in flat valleys within the limestone massif, and in lowland areas bordering it. Natural forest covers the majority of the national park. The most widespread forest type is limestone forest but there are also significant areas of lowland evergreen forest distributed on non-calcareous substrates in valleys among the limestone karst.
Areas.