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| Irano-Turanian | |
|---|---|
| Name | Irano-Turanian |
| Biome | Temperate grasslands, savannas, and shrublands |
| Countries | Iran; Afghanistan; Pakistan; Turkmenistan; Uzbekistan; Kazakhstan; Kyrgyzstan; Tajikistan; Turkey; Iraq; Syria; Armenia; Azerbaijan; Mongolia; China |
Irano-Turanian.
The Irano-Turanian realm denotes a major temperate bioregion spanning parts of Iran, Turkey, Afghanistan, Pakistan, Turkmenistan, Uzbekistan, Kazakhstan, Kyrgyzstan, Tajikistan, Azerbaijan, Armenia, Iraq, Syria, Mongolia, and China. It is recognized in biogeography alongside regions discussed by scholars associated with institutions such as the Royal Botanic Gardens, Kew, the Smithsonian Institution, the International Union for Conservation of Nature, and historical surveys by explorers like Alexander von Humboldt and Père Savigny. Major physical frameworks include the Zagros Mountains, the Elburz Mountains, the Alborz Mountains, the Tian Shan, the Altai Mountains, and the Caspian Sea basin.
The Irano-Turanian domain is defined in floristic and biogeographic schemes advanced in comparative reviews by researchers from the Natural History Museum, London, the Russian Academy of Sciences, the Persian Academy of Sciences and the Chinese Academy of Sciences, and appears in regional treatments by botanists such as Alexander von Humboldt, August Grisebach, Wilhelm Schimper, P. H. Davis, and Arthur T. H. Brown. Boundaries interact with neighboring provinces characterized by landmarks like the Mediterranean Basin, the Himalayan complex, the Sahara, and the Sino-Japanese region, and the concept has been used in floristic checklists compiled by institutions such as the Royal Botanic Garden Edinburgh and the Kew Millennium Seed Bank Partnership.
The region encompasses plateaus and basins of the Iranian Plateau, stretches across the Anatolian Plateau, extends into the Central Asian Fergana Valley, reaches parts of the Turan Plain, and includes peripheral ranges adjacent to the Caucasus Mountains and the Hindu Kush. Political entities containing Irano-Turanian biotopes include nation-states like Iran, Iraq, Turkey, Syria, Azerbaijan, Armenia, Georgia, Kazakhstan, Uzbekistan, Turkmenistan, Kyrgyzstan, Tajikistan, Afghanistan, Pakistan, Mongolia, and the People's Republic of China. Conservation designations occur in protected areas administered by agencies such as UNESCO, national parks like Golestan National Park, and biosphere reserves recognized under the Man and the Biosphere Programme.
Climatic regimes across the region are influenced by the Westerlies, the Indian Monsoon, the Siberian anticyclone, and orographic rain shadows cast by ranges such as the Hindu Kush and the Tian Shan. Seasonal extremes produce continental climates similar to those recorded at meteorological stations in Tehran, Ashgabat, Tashkent, Nur-Sultan, and Ulaanbaatar. Ecological studies by researchers affiliated with the International Center for Agricultural Research in the Dry Areas and the Food and Agriculture Organization document gradients in precipitation, temperature, and evapotranspiration that drive transitions among steppe, semi-desert, and montane assemblages.
Dominant vegetation includes temperate steppe communities, montane woodlands, scrublands, and desert fringe floras characterized by genera documented by taxonomists at Kew Gardens and the Muséum national d'Histoire naturelle. Typical plant groups include members of the Fabaceae represented in regional floras studied by P. H. Davis, members of the Asteraceae catalogued by authors connected to the Royal Society, and Poaceae grasses recorded in flora surveys from the Turkestan Botanical Garden. Notable taxa recorded across the area involve genera such as Astragalus, Artemisia, Stipa, Pistacia, Prunus, Berberis, Rosa, Salvia, and Ferula, with species lists compiled in floras produced by the Iranian Research Institute of Plant Protection and herbaria at the Komarov Botanical Institute and Tehran University.
Fauna reflects continental and montane affinities documented by zoologists from the Zoological Society of London, the Russian Academy of Sciences', and universities including Tehran University and Al-Farabi Kazakh National University. Keystone and emblematic vertebrates include the Asiatic cheetah (historically), the Persian leopard, the Eurasian lynx, the Argali, the Markhor, the Saiga antelope, the European houbara bustard, the Saker falcon, and migratory taxa using corridors recorded by BirdLife International and Wetlands International. Invertebrate assemblages include pollinators and steppe specialists documented by entomologists affiliated with the Natural History Museum, Paris and the Smithsonian Institution.
Biogeographic syntheses by paleobotanists and paleozoologists from the University of Cambridge, the Max Planck Institute for Evolutionary Anthropology, and the Institute of Geography of the Russian Academy of Sciences trace floristic assembly to tectonic and climatic events linked to the uplift of the Alps–Himalaya orogenic belt, the closure of the Tethys Sea, Pleistocene glacial cycles studied by paleoclimatologists at Lamont–Doherty Earth Observatory, and dispersal routes connecting Eurasia discussed in literature from the Royal Society. Phylogenetic work published by teams at the Smithsonian Institution and the Kew Gardens reveals speciation in genera such as Astragalus and Allium driven by montane isolation and aridification episodes reconstructed from Quaternary records.
Conservation assessments conducted by the International Union for Conservation of Nature, BirdLife International, and national environment ministries highlight threats including habitat conversion linked to agriculture promoted by agencies like the Food and Agriculture Organization, overgrazing documented in reports by the World Bank, water diversion projects impacting basins such as the Amu Darya and Syr Darya, and extraction activities overseen by energy companies operating in fields near Baku and Tehran. Conservation initiatives include protected areas coordinated with UNESCO, transboundary projects involving the European Union and regional programs of the Economic Cooperation Organization, and species recovery efforts led by NGOs like the Wildlife Conservation Society and the World Wildlife Fund.
Category:Biogeographic regions