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| Coihue (Nothofagus dombeyi) | |
|---|---|
| Name | Coihue |
| Genus | Nothofagus |
| Species | N. dombeyi |
| Authority | (Mirb.) Oerst. |
Coihue (Nothofagus dombeyi) is a large evergreen southern beech tree native to temperate South America. It is notable for its tall stature, dense canopy, and role as a keystone canopy species in Valdivian temperate rain forest, Andes, and Patagonian woodland ecosystems. Coihue has been the subject of botanical study by researchers associated with institutions such as the National University of La Plata, University of Chile, and Smithsonian Institution.
Coihue attains heights of up to 40–50 m, with trunk diameters exceeding 1.5 m in mature specimens studied in stands near Llanquihue Lake, Nahuel Huapi National Park, and the Araucanía Region. The bark is dark, fissured and was documented in timber assessments by teams from the Forestry Commission and the Servicio Nacional de Áreas Silvestres Protegidas del Estado. Leaves are leathery, glossy, and alternate, similar in habit to members recorded from herbarium collections at the Royal Botanic Gardens, Kew and the Museo Nacional de Historia Natural, Santiago. Flowers are small, inconspicuous, and wind-pollinated, a trait noted in comparative studies comparing Nothofagus antarctica and Nothofagus pumilio. Fruit are three-celled cupules producing small triangular nuts referenced in monographs published by the International Union for Conservation of Nature collaborators.
Nothofagus dombeyi was described by botanists working in the 19th century and its nomenclatural history appears in catalogues of the Muséum National d'Histoire Naturelle, the Royal Society, and records from the French Academy of Sciences. The species is placed in the genus Nothofagus, which also includes Nothofagus antarctica, Nothofagus pumilio, and Nothofagus obliqua; its systematic position has been reassessed in phylogenetic analyses by researchers affiliated with the Smithsonian Institution, the Max Planck Society, and the Natural History Museum, London. Synonymy, type specimens, and author citations appear in compendia such as those compiled by the International Plant Names Index and taxonomic revisions published through the Botanical Society of America.
Coihue is distributed along the western Andes and adjacent ranges from central Chile (around the Biobío Region and Araucanía Region) into Argentina (including Neuquén Province and Río Negro Province). It occupies humid montane and valdivian forests at elevations from near sea level to approximately 1,200 m, forming pure or mixed stands with species like Alerce, Lenga, and Arrayán in locations such as the Los Lagos Region, Nahuel Huapi National Park, and the Conguillío National Park. Its range and altitudinal limits have been mapped by research teams from the University of Buenos Aires and the Pontifical Catholic University of Chile.
Coihue functions as a dominant canopy tree influencing microclimate, soil development, and understorey composition in Valdivian temperate rain forest and Andean woodlands. Its phenology—leaf retention, flowering, and mast seeding—has been monitored in long-term plots managed by the Institute of Patagonia, the Forest Service (Argentina), and the National Forestry Corporation (CONAF). Coihue provides habitat and forage for vertebrates including Kodkod, Magellanic woodpecker, and marsupials reported by field studies from the Austral University of Chile. Mycorrhizal associations and fungal partners (documented by mycologists from the Royal Botanic Garden Edinburgh and the University of Göttingen) affect nutrient uptake and regeneration. Natural disturbance regimes—including windthrow, fire documented in historical records of the Chilean–Peruvian War era landscapes, and pathogen outbreaks such as those investigated by the Food and Agriculture Organization—shape population dynamics.
Coihue timber is valued for construction, joinery, and furniture; commercial exploitation has been recorded in regional industry reports from the Ministry of Agriculture (Chile), the Chilean Wood Industry Association, and export statistics compiled by the World Trade Organization. Local communities, including Mapuche communities represented by organizations like the Consejo de Todas las Tierras, have used coihue wood and charcoal for heating and artisanal crafts. Non-timber uses include provision of shelter and aesthetic value in urban plantings in cities such as Valdivia, Bariloche, and Puerto Montt. Research into coihue as a source for biomass energy and sawmill products has been published by laboratories at the University of Concepción and the National Institute of Agricultural Technology (INTA).
Coihue populations face pressures from clearcutting documented in environmental impact assessments by the Ministry of Environment (Chile), conversion to exotic plantation species like Pinus radiata and Eucalyptus globulus, and pests whose outbreaks have been reported by the National Forest Service (Argentina). Climate change impacts projected by modeling groups at the Intergovernmental Panel on Climate Change and the Centro de Cambio Global (Chile) indicate shifts in suitable habitat. Protected areas such as Los Alerces National Park, Nahuel Huapi National Park, and Vicente Pérez Rosales National Park include coihue stands, and conservation measures have been advanced by NGOs including Conservation International and the World Wildlife Fund working with national agencies. Ex situ conservation efforts involve seed banks coordinated with the Millennium Seed Bank Partnership.
Silvicultural trials at institutions like the University of Chile, Instituto Forestal (INFOR), and the National University of Río Negro explore provenance selection, thinning regimes, and regeneration techniques. Coihue is cultivated for reforestation in riparian restoration projects overseen by the Corporación Nacional Forestal (CONAF) and community forestry programs supported by the Food and Agriculture Organization. Management addresses disease monitoring, control of invasive species such as Ulex europaeus and Pinus radiata encroachment, and integration into mixed-species plantations following guidelines from the International Union of Forest Research Organizations.
Category:Nothofagus Category:Trees of Argentina Category:Trees of Chile