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| Ecoregions of Argentina | |
|---|---|
| Name | Ecoregions of Argentina |
| Country | Argentina |
Ecoregions of Argentina are the distinct terrestrial, freshwater, and marine ecological regions that reflect the country's varied climates, topography, and biogeographic history. Argentina spans from the Tierra del Fuego archipelago at high southern latitudes through the Patagonian Desert and Andes to the subtropical Gran Chaco and Mesopotamia wetlands, linking ecosystems associated with Antarctica and the Atlantic Ocean. These ecoregions are recognized by international frameworks such as the World Wildlife Fund and the Freshwater Ecoregions of the World initiative and intersect with provincial jurisdictions including Buenos Aires Province, Salta Province, and Santa Cruz Province.
Argentina's ecoregions are classified across terrestrial, freshwater, and marine realms following schemes used by the World Wildlife Fund and the IUCN. Major terrestrial biomes include Temperate grasslands, savannas, and shrublands, Temperate broadleaf and mixed forests, Montane grasslands and shrublands, Deserts and xeric shrublands, and Mangroves. Key physiographic features shaping classification include the Andes mountain chain, the Paraná River basin, the Uruguay River, and the South Atlantic Ocean. Historical biogeographic processes involve connections to the Neotropics, faunal exchange via the Panama Isthmus closure, and Pleistocene glaciations that affected regions such as Patagonia and Tierra del Fuego.
Argentina's terrestrial ecoregions encompass the Pampas, a mosaic of fertile grasslands in Buenos Aires Province and Córdoba Province; the Monte Desert across San Juan Province and La Rioja Province; the cold, arid Patagonian steppe in Río Negro Province and Chubut Province; the montane Yungas cloud forests on the eastern slopes of the Andes in Jujuy Province and Salta Province; and the subtropical Esteros del Iberá wetlands of Corrientes Province within Mesopotamia. These ecoregions host emblematic species such as the Guanaco, Andean condor, Jaguar, Puma, and numerous endemic rodents and passerines found in provinces like Neuquén Province.
Freshwater ecoregions reflect major drainage basins: the La Plata Basin including the Paraná River, Paraguay River, and Uruguay River systems that support migratory fishes like dorado and Surubí; the Patagonian river networks draining to the Atlantic Ocean and Beagle Channel supporting cold-water trout populations introduced from United Kingdom initiatives; Andean highland lakes and streams in Mendoza Province and San Juan Province fed by glacial melt; and the isolated endorheic systems of the Puna and Monte Desert with specialized ichthyofauna. Freshwater conservation interfaces with agencies such as the Comisión Técnica Mixta del Frente Marítimo and regional frameworks involving Mercosur environmental cooperation.
Argentina's marine ecoregions include the productive Patagonian Shelf and the Falkland Islands/Islas Malvinas shelf waters, the cold-temperate currents of the South Atlantic Ocean, and the subantarctic upwelling zones near Tierra del Fuego and the Drake Passage. These marine areas sustain commercial fisheries for Hake, Blue Whale, Southern Right Whale, King Penguin, and seabird colonies such as those on Isla de los Estados and Península Valdés. Marine governance involves institutions like the Instituto Nacional de Investigación y Desarrollo Pesquero and international agreements including the Commission for the Conservation of Antarctic Marine Living Resources where Argentine interests intersect with those of United Kingdom and Chile.
Biogeographic provinces within Argentina include the Chaco, Paraná, Patagonian, Andean-Patagonian Forests, and Magellanic provinces, each with unique assemblages and high levels of local endemism. Endemic taxa include amphibians of the Yungas and Puna highlands, plants of the Sierras Pampeanas such as rare cacti and bromeliads, and invertebrates confined to karst systems in Misiones Province. Paleontological records from sites like Ischigualasto and Talampaya inform historical distributions, while institutions such as the Museo Argentino de Ciencias Naturales curate specimens critical to understanding endemism patterns.
Major threats include agricultural conversion in the Pampas and Chaco, deforestation for soy cultivation linked to actors in Rosario, Santa Fe Province and global commodity chains, overfishing on the Patagonian Shelf affecting stocks of Hake and Anchovy, invasive species such as Austromegabalanuspsammodytes and introduced trout impacting native fishes, hydropower development on the Paraná River and Biobío River catchments, and climate change impacts on Andean glaciers recorded by research centers in Bariloche. Conservation status assessments by the IUCN and the World Resources Institute indicate that many ecoregions, including remnants of Yungas and Atlantic Forest patches, are critically fragmented and habitat loss hotspots.
Argentina's protected area network includes national parks such as Iguazú National Park, Los Glaciares National Park, Nahuel Huapi National Park, and marine protected areas like the Peninsula Valdes Marine Protected Area. Provincial reserves—e.g., in Salta Province and Corrientes Province—complement federal sites, while international designations include UNESCO World Heritage Sites at Ischigualasto and Los Glaciares. Conservation management involves federal agencies like the Administración de Parques Nacionales, NGOs such as Aves Argentinas and Wildlife Conservation Society Argentina programs, and transboundary initiatives with Chile and Uruguay on corridors and river basin management. Restoration projects, sustainable ranching in the Pampas promoted by stakeholders in La Pampa Province, and community-based conservation with indigenous groups including the Mapuche aim to reconcile livelihoods and biodiversity objectives.
Category:Environment of Argentina