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Quercus Mulleri
''Quercus mulleri'' is a rare Mexican species of oak. It has been found only in a small area of the Sierra de Miahuatlán, a sub-range of the Sierra Madre del Sur in southern Oaxaca state. Description ''Quercus mulleri'' is a small- to medium-sized tree, growing to 12 to 15 meters in height at maturity, and occasionally to 20 meters. It has glossy green leaves, which form a dense crown. Habitat and range ''Quercus mulleri'' is currently known from a single small population in Miahuatlán District of southern Oaxaca. Here it is found in montane conifer–oak forest on rugged terrain at approximately 1850 meters elevation. The population is estimated at 138 mature individuals, and the species' extent of occurrence (EOO) and area of occupancy (AOO) are both estimated at 4 km2, but may be much smaller, as the known population consists of two patches of trees covering several acres. It was described in 1953 from two other locations, but is no longer found there. Conservation an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sierra De Miahuatlán
The Sierra Madre del Sur is a mountain range in southern Mexico, extending from southern Michoacán east through Guerrero, to the Isthmus of Tehuantepec in eastern Oaxaca. Geography The Sierra Madre del Sur joins with the Eje Volcánico Transversal (Trans-Mexican Volcanic Belt) of central Mexico in northern Oaxaca, but is separated from this range further west by the valley of the Balsas River and its tributary the Tepalcatepec River. The mountains' highest point is Cerro Nube – , in southern Oaxaca, and just one major highway crosses the range between Acapulco and Mexico City. Although separated from the main part of the Sierra Madre del Sur by the deep canyon of the lower Río Balsas, the mountains of southern Michoacán around Coalcomán are usually considered part of the Sierra Madre del Sur. Ecology The range is noted for its very high biodiversity and large number of endemic species. The Sierra Madre del Sur pine-oak forests ecoregion occupies the higher reaches o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sierra Madre Del Sur
The Sierra Madre del Sur is a mountain range in southern Mexico, extending from southern Michoacán east through Guerrero, to the Isthmus of Tehuantepec in eastern Oaxaca. Geography The Sierra Madre del Sur joins with the Eje Volcánico Transversal (Trans-Mexican Volcanic Belt) of central Mexico in northern Oaxaca, but is separated from this range further west by the valley of the Balsas River and its tributary the Tepalcatepec River. The mountains' highest point is Cerro Nube – , in southern Oaxaca, and just one major highway crosses the range between Acapulco and Mexico City. Although separated from the main part of the Sierra Madre del Sur by the deep canyon of the lower Río Balsas, the mountains of southern Michoacán around Coalcomán are usually considered part of the Sierra Madre del Sur. Ecology The range is noted for its very high biodiversity and large number of endemic species. The Sierra Madre del Sur pine-oak forests ecoregion occupies the higher reaches ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oaxaca
) , population_note = , population_rank = 10th , timezone1 = CST , utc_offset1 = −6 , timezone1_DST = CDT , utc_offset1_DST = −5 , postal_code_type = Postal code , postal_code = 68–71 , area_code_type = Area code , area_code = , iso_code = MX-OAX , blank_name_sec1 = HDI , blank_info_sec1 = 0.710 Ranked 31st of 32 , blank_name_sec2 = GDP , blank_info_sec2 = US$ 18.18 billion (2020) Ranked 20th of 32 , website = Oaxaca ( , also , , from nci, Huāxyacac ), officially the Free and Sovereign State of Oaxaca ( es, Estado Libre y Soberano de Oaxaca), is one of the 32 states that compose the Federative Entities of Mexico. It is divided into 570 municipalities, of which 418 (almost three quarters) are governed by the system of (customs and traditions) with recognized local ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Miahuatlán District
Miahuatlán District is located in the south of the Sierra Sur Region of the State of Oaxaca, Mexico. Municipalities The district includes the following municipalities: * Miahuatlán de Porfirio Díaz * Monjas * San Andrés Paxtlán *San Cristóbal Amatlán * San Francisco Logueche * San Francisco Ozolotepec * San Ildefonso Amatlán * San Jerónimo Coatlán *San José del Peñasco * San José Lachiguiri * San Juan Mixtepec, Miahuatlán * San Juan Ozolotepec * San Luis Amatlán * San Marcial Ozolotepec * San Mateo Río Hondo *San Miguel Coatlán *San Miguel Suchixtepec * San Nicolás * San Pablo Coatlán * San Pedro Mixtepec, Miahuatlán * San Sebastián Coatlán *San Sebastián Río Hondo * San Simón Almolongas * Santa Ana * Santa Catarina Cuixtla * Santa Cruz Xitla * Santa Lucía Miahuatlán *Santa María Ozolotepec *Santiago Xanica * Santo Domingo Ozolotepec *Santo Tomás Tamazulapan *Sitio de Xitlapehua Sitio de Xitlapehua is a town and municipality in Oaxaca in south-weste ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sierra Madre Del Sur Pine–oak Forests
The Sierra Madre del Sur pine–oak forests is a subtropical coniferous forest ecoregion in the Sierra Madre del Sur mountain range of southern Mexico. Setting The Sierra Madre del Sur pine–oak forests occupy an area of , within the states of Michoacán, Guerrero, and Oaxaca. The pine–oak forests occupy the higher slopes of the Sierra Madre del Sur range, which runs east and west parallel to Mexico's southern Pacific Coast. The forests are surrounded by tropical dry forests at lower elevations; the Jalisco dry forests to the west; the Balsas dry forests to the north, in the basin of the Balsas River, and the Southern Pacific dry forests to the south and east along the Pacific coast. Flora The chief plant communities are oak forests, cloud forests, pine–oak forests, and fir forests. The plant communities vary with elevation and rainfall. The oak forests occur between 1900 and 2500 metres elevation (6,200-8,200 feet). ''Quercus magnoliifolia'' and ''Quercus castanea'' a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extent Of Occurrence
Extent may refer to: Computing * Extent (file systems), a contiguous region of computer storage medium reserved for a file * Extent File System, a discontinued file system implementation named after the contiguous region * Extent, a chunk of storage space logical volume management uses internally to provide various device mappings * Extent, in computer programming, is the period during which a variable has a particular value Other * Extent, a technical description of the wingspan of a bird, bat, or other flying animal * Extent, a writ allowing a creditor to seize or assume temporary ownership of a debtor's property; also, the actual seizure in its execution * Map extent A map extent is the portion of area of a region shown in a map. The limits of a map extent are defined in the coordinate system In geometry, a coordinate system is a system that uses one or more numbers, or coordinates, to uniquely determine ..., the portion of a region shown in a map See also * Ex ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Area Of Occupancy
Area is the quantity that expresses the extent of a region on the plane or on a curved surface. The area of a plane region or ''plane area'' refers to the area of a shape or planar lamina, while ''surface area'' refers to the area of an open surface or the boundary of a three-dimensional object. Area can be understood as the amount of material with a given thickness that would be necessary to fashion a model of the shape, or the amount of paint necessary to cover the surface with a single coat. It is the two-dimensional analogue of the length of a curve (a one-dimensional concept) or the volume of a solid (a three-dimensional concept). The area of a shape can be measured by comparing the shape to squares of a fixed size. In the International System of Units (SI), the standard unit of area is the square metre (written as m2), which is the area of a square whose sides are one metre long. A shape with an area of three square metres would have the same area as three such squa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Relict Population
In biogeography and paleontology, a relict is a population or taxon of organisms that was more widespread or more diverse in the past. A relictual population is a population currently inhabiting a restricted area whose range was far wider during a previous geologic epoch. Similarly, a relictual taxon is a taxon (e.g. species or other lineage) which is the sole surviving representative of a formerly diverse group. Definition A relict (or relic) plant or animal is a taxon that persists as a remnant of what was once a diverse and widespread population. Relictualism occurs when a widespread habitat or range changes and a small area becomes cut off from the whole. A subset of the population is then confined to the available hospitable area, and survives there while the broader population either shrinks or evolves divergently. This phenomenon differs from endemism in that the range of the population was not always restricted to the local region. In other words, the species or grou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pleistocene
The Pleistocene ( , often referred to as the '' Ice age'') is the geological epoch that lasted from about 2,580,000 to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was finally confirmed in 2009 by the International Union of Geological Sciences, the cutoff of the Pleistocene and the preceding Pliocene was regarded as being 1.806 million years Before Present (BP). Publications from earlier years may use either definition of the period. The end of the Pleistocene corresponds with the end of the last glacial period and also with the end of the Paleolithic age used in archaeology. The name is a combination of Ancient Greek grc, label=none, πλεῖστος, pleīstos, most and grc, label=none, καινός, kainós (latinized as ), 'new'. At the end of the preceding Pliocene, the previously isolated North and South American continents were joined by the Isthmus of Panama, causing a faunal interchange between the t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pinus Patula
''Pinus patula'', commonly known as patula pine, spreading-leaved pine, or Mexican weeping pine, and in Spanish as ''pino patula'' or ''pino llorón'', (''patula'' Latin = “spreading”) is a tree native to the highlands of Mexico. It grows from 24° to 18° North latitude and above sea level. The tree grows up to tall. It cannot withstand long periods of temperatures as low as , but resists occasional brief dips below . It is moderately drought-tolerant, and in this respect is superior to '' Pinus taeda''. The average annual rainfall in its native habitat is from 750 to 2000 mm. This happens mostly in summer, but in a little area of the State of Veracruz on the Sierra Madre Oriental its habitat is rainy the year round. It is planted at high altitudes in Ecuador (3500 m), Bolivia, Colombia (3300m), Kenya, Tanzania, Angola, Zimbabwe, Papua New Guinea, and Hawaii (3000 m). In Hawaii it is replacing the native alpine grassland. At lower altitudes than its origin country i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quercus
An oak is a tree or shrub in the genus ''Quercus'' (; Latin "oak tree") of the beech family, Fagaceae. There are approximately 500 extant species of oaks. The common name "oak" also appears in the names of species in related genera, notably '' Lithocarpus'' (stone oaks), as well as in those of unrelated species such as '' Grevillea robusta'' (silky oaks) and the Casuarinaceae (she-oaks). The genus ''Quercus'' is native to the Northern Hemisphere, and includes deciduous and evergreen species extending from cool temperate to tropical latitudes in the Americas, Asia, Europe, and North Africa. North America has the largest number of oak species, with approximately 160 species in Mexico of which 109 are endemic and about 90 in the United States. The second greatest area of oak diversity is China, with approximately 100 species. Description Oaks have spirally arranged leaves, with lobate margins in many species; some have serrated leaves or entire leaves with smooth mar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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