[custom_adv] Hirkani forests of the Caspian Sea, was registered as world heritage in the United Nations Educational, Scientific and Cultural Organization. The Hirkani ecosystem is home to 296 species of birds, 98 species of mammals, and 150 native trees and bushes. [custom_adv] Hyrcanian forest granted the areas with unique richness of biological diversity, its endemic and endangered species, its natural beauty and its masterpieces of nature creative genius in the form of this ancient forest. North as along band has diverse natural, economic and social conditions. [custom_adv] It characterized by various ecological conditions from 550 to 2200mm precipitation, zero to 5671 m elevation and various vegetation landscape from conifers to broadleaved to Mediterranean plants. [custom_adv] Hyrcanian forest contain the most important and significant natural habitats for in-situ conservation of biological diversity, including those containing threatened species of outstanding universal value from the point of view of science or conservation. [custom_adv] These conditions caused great diversity in species. It due to its diverse ecological condition is rich in relict species that some of them referred to the Tertiary period. It also contains superlative natural phenomena or areas of exceptional natural beauty and aesthetic importance. [custom_adv] These forests have different types of vegetation depending on the elevation. Its best-known trees are the rush, oak, alder, elm, ash, and cedar. It is outstanding examples in the record of significant on-going geological processes in the development of landforms and significant geomorphic or physiographic features. [custom_adv] It is also outstanding example representing significant ongoing ecological and biological processes in the evolution and development of terrestrial, ecosystems and communities of plants. [custom_adv] Hirkani forests of the Caspian Sea, was registered as world heritage in the United Nations Educational, Scientific and Cultural Organization. The Hirkani ecosystem is home to 296 species of birds, 98 species of mammals, and 150 native trees and bushes.
