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Magdalena Valley Dry Forests
The Magdalena Valley dry forests (NT0221) is an ecoregion in Colombia along the upper Magdalena River, a large river that runs from south to north between the two main ''cordilleras'' of the Andes. There are many endemic species, but much of the original habitat has been destroyed by agriculture and over-grazing, mainly by goats. The habitat is not protected by any national park, and is at risk of complete destruction. Location The Magdalena Valley dry forests ecoregion is in the valley of the upper Magdalena River, a river that flows north through the Andes to the Caribbean. It has an area of . The Magdalena River is the largest in Colombia. The dry forests are almost entirely surrounded by the Magdalena Valley montane forests ecoregion. At its northern end the dry valley merges into the Magdalena–Urabá moist forests. It holds a small patch of the Northern Andean páramo ecoregion. Terrain The Magdalena River runs from the Central Massif between the Eastern and Central ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magdalena River
The Magdalena River ( es, Río Magdalena, ; less commonly ) is the main river of Colombia, flowing northward about through the western half of the country. It takes its name from the biblical figure Mary Magdalene. It is navigable through much of its lower reaches, in spite of the shifting sand bars at the mouth of its delta, as far as Honda, at the downstream base of its rapids. It flows through the Magdalena River Valley. Its drainage basin covers a surface of , which is 24% of the country's area and where 66% of its population lives. Course The Magdalena River is the largest river system of the northern Andes, with a length of 1,612 km. Its headwaters are in the south of Colombia, where the Andean subranges Cordillera Central and Cordillera Oriental separate, in Huila Department. The river runs east then north in a great valley between the two cordilleras. It reaches the coastal plain at about nine degrees north, then runs west for about , then north again, reaching ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neiva, Huila
Neiva () is the capital of the Department of Huila. It is located in the valley of the Magdalena River in south central Colombia with a population of about 357,392 inhabitants. It is one of the most important cities in southern Colombia, mainly because of its strategic geographical location. History Neiva was first founded in 1539 by Juan de Cabrera in an area now belonging to the municipality of Campoalegre. In 1550, Juan de Alonso y Arias relocated the city to the place that is now the municipality of Villavieja. At this location, the city was destroyed by indigenous tribes in 1560. The city was founded, at its current location, for the third and final time in 1612 by Diego de Ospina y Medinilla. Neiva became important during the colonial times because of its strategic location. It was located in the trade route that communicated the Viceroyalty of Peru with Bogotá and Caracas. The city was declared as the capital of the Province of Neiva, made up of the Neiva, La Plata, Ti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Köppen Climate Classification
The Köppen climate classification is one of the most widely used climate classification systems. It was first published by German-Russian climatologist Wladimir Köppen (1846–1940) in 1884, with several later modifications by Köppen, notably in 1918 and 1936. Later, the climatologist Rudolf Geiger (1894–1981) introduced some changes to the classification system, which is thus sometimes called the Köppen–Geiger climate classification system. The Köppen climate classification divides climates into five main climate groups, with each group being divided based on seasonal precipitation and temperature patterns. The five main groups are ''A'' (tropical), ''B'' (arid), ''C'' (temperate), ''D'' (continental), and ''E'' (polar). Each group and subgroup is represented by a letter. All climates are assigned a main group (the first letter). All climates except for those in the ''E'' group are assigned a seasonal precipitation subgroup (the second letter). For example, ''Af'' indi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cactus
A cactus (, or less commonly, cactus) is a member of the plant family Cactaceae, a family comprising about 127 genera with some 1750 known species of the order Caryophyllales. The word ''cactus'' derives, through Latin, from the Ancient Greek word (''káktos''), a name originally used by Theophrastus for a spiny plant whose identity is now not certain. Cacti occur in a wide range of shapes and sizes. Although some species live in quite humid environments, most cacti live in habitats subject to at least some drought. Many live in extremely dry environments, even being found in the Atacama Desert, one of the driest places on Earth. Because of this, cacti show many adaptations to conserve water. For example, almost all cacti are succulents, meaning they have thickened, fleshy parts adapted to store water. Unlike many other succulents, the stem is the only part of most cacti where this vital process takes place. Most species of cacti have lost true leaves, retaining only spine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Center Of Endemism
A Centre of Endemism is an area in which the ranges of restricted-range species overlap, or a localised area which has a high occurrence of endemics. Centres of endemism may overlap with biodiversity hotspots which are biogeographic regions characterized both by high levels of plant endemism ''and by serious levels of habitat loss''. The exact delineation of centres of endemism is difficult and some overlap with one another. Centres of endemism are high conservation priority areas. Examples of Centres of Endemism Tanzania A local centre of endemism is focussed on an area of lowland forests around the plateaux inland of Lindi in SE Tanzania, with between 40 and 91 species of vascular plants which are not found elseware. Southern Africa There are at least 19 centres of plant endemism,Van Wyk and Smith, (2001) ''Regions of Floristic Endemism'' including the following: * Albany Centre of Plant Endemism * Barberton Centre of Plant Endemism * Cape Floristic Region * Drakensberg A ... [...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 two reg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chocó–Darién Moist Forests
The Chocó–Darién moist forests (NT0115) is an ecoregion in the west of Colombia and east of Panama. The region has extremely high rainfall, and the forests hold great biodiversity. The northern and southern parts of the ecoregion have been considerably modified for ranching and farming, and there are threats from logging for paper pulp, uncontrolled gold mining, coca growing and industrialisation, but the central part of the ecoregion is relatively intact. Geography Location The Chocó–Darién moist forests extend along most of the Pacific coast of Colombia and extend north into Panama along the Caribbean coast. They are bounded to the east by the Andes, which separate them from the Amazon and Orinoco ecoregions. They have an area of . In Colombia the ecoregion is in the Chocó, Cauca, Valle del Cauca and Nariño departments. In Panama it is in the Darién and Guna Yala provinces. The northern section merges into Isthmian-Atlantic moist forests to the west in the Is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Refugium (population Biology)
Refugium, plural refugia, the Latin for "refuge" or "hideaway", may refer to: * Refugium (fishkeeping), an appendage to a marine, brackish, or freshwater fish tank that shares the same water supply * Refugium (population biology), a location of an isolated or relict population of a once widespread animal or plant species ** Last Glacial Maximum refugia specifically, in anthropology * Refugium Range The Refugium Range is a low, small mountain range comprising the mountains/hills of the Brooks Peninsula on northern Vancouver Island, British Columbia, Canada. It has an area of and is a subrange of the Vancouver Island Ranges which in turn for ..., a mountain range on Vancouver Island, British Columbia, Canada See also * Refuge (Buddhism) * Refugium Peccatorum {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quaternary
The Quaternary ( ) is the current and most recent of the three periods of the Cenozoic Era in the geologic time scale of the International Commission on Stratigraphy (ICS). It follows the Neogene Period and spans from 2.58 million years ago to the present. The Quaternary Period is divided into two epochs: the Pleistocene (2.58 million years ago to 11.7 thousand years ago) and the Holocene (11.7 thousand years ago to today, although a third epoch, the Anthropocene, has been proposed but is not yet officially recognised by the ICS). The Quaternary Period is typically defined by the cyclic growth and decay of continental ice sheets related to the Milankovitch cycles and the associated climate and environmental changes that they caused. Research history In 1759 Giovanni Arduino proposed that the geological strata of northern Italy could be divided into four successive formations or "orders" ( it, quattro ordini). The term "quaternary" was introduced by Jules Desn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marañón Dry Forests
The Marañón dry forests (NT0223) is an ecoregion in northern Peru. It covers the lower valley of the Marañón River and its tributaries along the eastern edge of the Andes. It has a dry climate due to rain shadow from mountains further east. The habitat has long been modified by farming, ranching and logging and is now threatened by construction of hydroelectric and irrigation dams. Location The Marañón dry forests ecoregion in northwestern Peru has an area of . It extends along the upper valley of the Marañón River and its tributaries. To the north the ecoregion adjoins the Eastern Cordillera Real montane forests. The northern part of the ecoregion extends from the Tumbes–Piura dry forests in the west to the Ucayali moist forests in the east. The ecoregion extends to the southeast through the Peruvian Yungas and patches of the Cordillera Central páramo. Physical The Marañón River rises on the Nevado de Yapura glacier, and runs northwest through northern Peru betwe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cauca Valley Dry Forests
The Cauca Valley dry forests is a tropical dry broadleaf forest ecoregion in Colombia. Location The Cauca Valley dry forests occupies an area of , extending in a long, narrow strip along the Cauca River. The Cauca Valley is nestled between the Cordillera Occidental and Cordillera Central in the northern Andes. These ranges create a rain shadow, which makes the Cauca Valley drier than the surrounding forests. The Cauca Valley dry forests lie below 1000 meters elevation; the higher slopes are occupied by the distinct Cauca Valley montane forests. Most of these forests have been cleared for agriculture over the years making it one of the most critically endangered ecoregions in Colombia. Laguna de Sonso Nature Reserve has a small area of protected forest. Ecology The ecoregion is part of the Tumbesian-Andean Valleys Dry Forests global ecoregion, which holds six terrestrial ecoregions: Tumbes–Piura dry forests, Ecuadorian dry forests, Patía Valley dry forests, Magdale ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Patía Valley Dry Forests
The Patía Valley dry forests (NT0225) is an ecoregion in southwestern Colombia. It covers a dry valley surrounded by mountains. The original habitat has mostly been destroyed by human activity, although a few pockets remain. Location The Patía Valley is in southwestern Colombia along the Patía River and its tributaries, surrounded by ranges of the Andes. It has an area of . It is almost completely surrounded by the Northwestern Andean montane forests ecoregion. The western extension downstream along the Patía River merges into the Chocó–Darién moist forests ecoregion.. Physical The Patía river flows westward from the Central massif of Colombia, cuts through the Western Cordillera and drains into the Pacific Ocean. In its upper section it runs through cloud forests and montane forests. The central section of the river forms the Patía dry valley. The lower section to the west of the Western Cordillera flows through the Chocó jungles of the Pacific region. The Patía is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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