Geography is the study of natural and human constructed phenomena from a spatial perspective. Geography has two main sub disciplines:
Human geography includes such subjects as demography, human settlements, transportation, recreation and tourism, resources, religion, social traditions, human migration, agriculture, urban systems, and economic activities
Physical geography is concerned with the study of the Earth’s atmosphere, biosphere, hydrosphere, and lithosphere from theoretical and applied viewpoints.
Sometimes the disciplines of human and physical geography combine knowledge to create a more holistic synthesis.
The Don Juan Pond in western Antarctica is the most saline water body on Earth, at approximately twelve to thirteen times the salinity level of other typical seas of the world....
Sierra Madre Oriental pine-oak forestsLast Updated on 2013-12-12 00:29:52
The Sierra Madre Oriental pine-oak forests contains a very diverse community of endemic and specialized species of plants, mammals, reptiles and amphibians. This ecoregion is classified as an element of the Tropical and Subtropical Coniferous Forests biome. These high mountains run north to south, beginning in the USA and ending in Mexico. The Sierra Madre Oriental pine-oak forests are a highly disjunctive ecoregion, owing to the fact that they are present only at higher elevations, within a region with considerable expanses of lower elevation desert floor.
The variation accumulated in this distance, between its ends and elevation ranges, increases the diversity of habitats and species present. For example, habitats in the north, near Big Bend, Texas are arid or desert-like with the influences of the Chihuahuan Desert; in the south, rainfall increases greatly, creating... More »
Arizona Mountains forestsLast Updated on 2013-12-10 10:46:49
The Arizona Mountain Forests extend from the Kaibab Plateau in northern Arizona to south of the Mogollon Plateau into portions of southwestern Mexico and eastern Arizona. This ecoregion is an element of the Temperate Coniferous Forests biome. The species richness in this ecoregion is moderate, with vertebrate taxa numbering 375 species. The topography consists chiefly of steep foothills and mountains, but includes some deeply dissected high plateaus. Elevations range from 1370 to 3000 meters (m) with some peaks as high as 3840 m. Soil types have not been well defined; however, most soils are entisols, with alfisols and inceptisols in upland areas. Stony terrain and rock outcrops occupy large areas on the mountains and foothills.
Vegetation zones in this ecoregion resemble the Rocky Mountain Life Zones but at higher elevations. Although forests in this ecoregion are too far south to... More »
Chihuahuan DesertLast Updated on 2013-12-06 23:07:07The Chihuahuan Desert encompasses one of the most biologically diverse arid regions on Earth. This ecoregion extends from within the United States south into Mexico. This desert is unique, as it has been sheltered from the influence of other arid regions such as the Sonoran Desert by the large mountain ranges of the Sierra Madres. This isolation has allowed the evolution of many endemic species; most notable is the high number of endemic plants; in fact, there are a total of 653 vertebrate taxa recorded in the Chihuahuan Desert. Moreover, this ecoregion also sustains some of the last extant populations of Mexican Prairie Dog, wild American Bison and Pronghorn Antelope.
Severe conservation pressures are on the Chihuahuan Desert. On the Mexico side, there are destructive activities from illegal poaching, habitat destruction from illegal drug trafficking and large scale movements of... More »
Ancient history of HanukkahLast Updated on 2013-12-06 09:44:53The ancient history of Hanukkah is set in the period of Greek domination over the Holy Land. Following severe oppression by the Greek ruler Antiochus, the Jewish people rose up and restored the Temple to its previous glory. Hanukkah, however, is not simply a celebration of this restoration of the self determination of the Jewish people, but really celebrates the accompanying miracle of the ceremonial olive oil flame that outlasted any expectation of extinction. Furthermore, Hanukkah, alternatively Chanukkah, is the Jewish holiday carried forward by oral history, not within the Torah, and thus is the Jewish holiday most uniquely of the Jewish people, as opposed to other Jewish holidays documented in the Torah and nurtured by the rabbinical culture.
Alexander the Great (356 – 323 BCE) conquered extensive lands in the Middle East including the historic homeland of the Jews,... More »
California coastal sage and chaparralLast Updated on 2013-12-05 20:18:34
The California coastal sage and chaparral ecoregion, located along the southern and central coast of California, has extremely high levels of species diversity and endemism. The coastal sage scrub is an endangered ecosystem that contains a number of endangered species. The California Gnatcatcher is currently being used as an umbrella species to protect the endemic flora and fauna of this region from urban development. The region is listed as an Endemic Bird Area with a large number of endemic scrub species. Generally located on high value coastal zone real estate and threatened by land development, the ecoregion represents the struggle between ecological preservation and human development.
The California coastal sage and chaparral encompasses coastal terraces, plains, and foothills along the Pacific coast of northwestern Mexico and southern California, USA. The Santa Rosa Mountains... More »
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