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| Mongolian-Manchurian grassland | |
|---|---|
| Name | Mongolian-Manchurian grassland |
| Other names | Daurian steppe, Eastern Eurasian steppe |
| Biome | Temperate grassland |
| Countries | Mongolia, China, Russia |
| Area | ~1,000,000 km² |
| Conservation | mixed protection |
Mongolian-Manchurian grassland is a vast temperate grassland ecoregion spanning parts of Mongolia, the People's Republic of China, and the Russian Federation, forming a transitional belt between the Siberian taiga, the Gobi Desert, and the Manchurian Mixed Forests. It supports steppe, meadow, and riparian habitats that sustain migratory ungulates, endemic flora, and traditional pastoral cultures linked to nomadic histories such as the Xiongnu and the Mongol Empire. The region has been a focus of international conservation programs involving institutions like the World Wildlife Fund and agreements influenced by actors including the United Nations Environment Programme.
The ecoregion extends across northeastern Inner Mongolia, eastern Mongolia (including aimags such as Dornod Province), and parts of the Amur Oblast and Zabaykalsky Krai in Russia, bounded by features like the Argun River, the Onon River, and the Kerulen River. Major urban centers near the grasslands include Hohhot, Ulaanbaatar, and Chita, while historical routes such as the Silk Road fringe the southern margins. Plateaus and basins form mosaic landscapes that connect to neighboring ecoregions including the Daurian forest steppe and the Mongolian-Manchurian ecoregion complex, creating cross-border conservation landscapes highlighted in transboundary initiatives between China and Mongolia.
Characterized by a continental climate with cold, dry winters and warm summers, the zone experiences temperature extremes similar to those recorded in Ulaanbaatar and Hohhot, influenced by continental air masses from Siberia and monsoonal flows from the East Asian Monsoon. Annual precipitation ranges from about 200–450 mm, with most rainfall in summer months that support grasses and forbs. Soils include chestnut and dark chestnut types (Kastanozems), chernozems in pockets, and solonchaks in saline depressions; these develop on loess and aeolian sediments comparable to deposits studied in the Loess Plateau and along the Amur River valley.
Vegetation is dominated by steppe grasses such as species akin to Stipa baicalensis and Leymus chinensis, interspersed with forb assemblages and saline-adapted halophytes in depressions near lakes like Lake Hulun and Lake Buir. Meadow steppes prevail in areas with higher moisture, while desert steppes grade toward the Gobi Desert flora. Riparian corridors support shrubs and trees including Populus tremula stands and willow thickets reminiscent of communities along the Onon River. Phytogeographic links tie the flora to floras of Central Asia and northeastern China, and botanists from institutions such as the Chinese Academy of Sciences and the Russian Academy of Sciences have cataloged many regionally endemic taxa.
The grassland hosts emblematic mammals including migratory ungulates like the Saiga antelope (populations historically overlapping ranges), the Przewalski's horse in reintroduction programs, and native gazelles and gazelle-like species recorded in historical texts from the Qing dynasty. Predators include the gray wolf and steppe-adapted Eurasian lynx, while avifauna features species such as the demoiselle crane and the great bustard, both subjects of conservation concern by organizations like BirdLife International. Wetland complexes serve as staging areas for migratory waterfowl along the East Asian–Australasian Flyway, engaging multilateral conservation frameworks that include the Ramsar Convention.
Pastoralism dominates land use, with herding of Mongolian native horse breeds, cashmere goat production linked to markets in Beijing and Ulaanbaatar, and traditional grazing systems maintained by ethnic groups including Khalkha Mongols and Buryats. Agricultural conversion occurs in the fertile plains, influenced by policies from the People's Republic of China and land reforms in Mongolia following the dissolution of the Soviet Union. Mining operations near mineral belts, infrastructure projects such as the Trans-Siberian Railway corridors, and water diversion for irrigation have altered hydrology and landscape connectivity, prompting management interventions by regional governments and NGOs.
Primary productivity is tightly coupled to seasonal precipitation and herbivore grazing; plant phenology responds to spring snowmelt and summer rains, while nutrient cycling is mediated by faunal activity from large mammals and soil invertebrates studied by ecologists at institutions like Mongolian University of Life Sciences. Fire regimes—both natural and anthropogenic—shape plant community composition, and carbon sequestration in steppe soils contributes to regional carbon budgets assessed in climate studies coordinated by agencies including the Intergovernmental Panel on Climate Change. Connectivity across the ecoregion supports migratory dynamics essential for population resilience, linking source–sink dynamics across international boundaries.
Major threats include overgrazing associated with livestock population increases, desertification processes influenced by drought and land degradation, conversion to cropland, mining impacts, and climate change projections affecting precipitation regimes as modeled by IPCC scenarios. In response, restoration initiatives involve grassland fencing reforms, rotational grazing trials led by research centers in Inner Mongolia Agricultural University, rewilding and reintroduction projects for species like Przewalski's horse coordinated with the International Union for Conservation of Nature, and transboundary protected areas promoted under bilateral agreements between China and Mongolia. International funding mechanisms, conservation NGOs, and local governance reforms continue to shape adaptive management to reconcile pastoral livelihoods with biodiversity objectives.
Category:Grasslands of Asia Category:Ecoregions of Mongolia Category:Ecoregions of China Category:Ecoregions of Russia