Geologisk Nordamerika


North America

Geografi ; natur ; demografi ; historie ; kultur ; musik ; politik ; forsvar ; fredsbevægelser ; religion ; sociale forhold ; uddannelse ; økonomi.
Geography; nature; demographics; history, culture, music, politics, defense, peace movements, religion, social issues, education, economy.
Géographie, la nature, la démographie, histoire, la culture, la politique, la défense, les mouvements pacifistes, la religion, les questions sociales, l'éducation, économie.
Geografía, naturaleza, demografía, historia, cultura, política, defensa, movimientos por la paz, la religión, las cuestiones sociales, la educación, la economía
Geographie, Natur, Demographie, Geschichte, Kultur, Politik, Verteidigung, Friedensbewegungen, Religion, Soziales, Bildung, Wirtschaft.
Geografi: Nordamerika består af følgende stater:
Natur, klima. Fauna og flora: Fisk. Fugle. Koralrev. Vådområder.
Flora and fauna: Fish. Birds. Coral reefs. Wetlands
Flore et faune: Poissons. Oiseaux. Les récifs coralliens. Les zones humides.
Flora y fauna: Fish. Pájaros. Los arrecifes de coral. Los humedales.
Flora und Fauna: Fisch. Vögeln. Korallenriffe. Feuchtgebiet, Feuchtbiotop.
Geologi: Bjerge, vulkaner, jordskælv og ørkenområder:
Geology: Mountains, volcanoes, earthquakes and desert areas
Géologie: Montagnes, volcans, tremblements de terre et les zones désertiques
Geología: Montañas, volcanes, terremotos y zonas desérticas
Geologie: Berge, Vulkane, Erdbeben und Wüstengebiete
World Database on Protected Areas: Beskyttede områder og nationalparker.
Ørkenområder: Chihuahuan Desert.
The Otero Mesa
The Chihuahuan Desert extends southward from New Mexico, Texas and Arizona into the Mexican Plateau. It covers an area of 250,000 square miles and is considered to be among the most biologically rich and diverse desert eco-regions in the world. The area is home to Pronghorn Antelope, migratory songbirds and independent cattle ranches that have been in operation for generations.
Despite local outrage and a 2005 law suit filed by New Mexico's governor against the Bush administration, the Bureau of Land Management has made the decision to nearly double the acreage available for oil and gas development on Otero Mesa. If it is turned into a full-scale oil and gas field, the Wilderness and much of the wildlife that live there will be threatened by groundwater pollution. Current drilling requires the use of a number of chemical agents (many of which are suspected carcinogens) that are used the entire length of a drilling process.
Plant dieback under exceptional drought driven by elevation, not by plant traits, in Big Bend National Park, Texas, USA. by Waring, Elizabeth F.; Schwilk, Dylan W., 2014 PeerJ, volume 2.
In 2011, Big Bend National Park, Texas, USA, experienced the most severe single year drought in its recorded history, resulting in significant plant mortality. We used this event to test how perennial plant response to drought varied across elevation, plant growth form and leaf traits. In October 2010 and October 2011, we measured plant cover by species at six evenly-spaced elevations ranging from Chihuahuan desert (666 m) to oak forest in the Chisos mountains (1,920 m). We asked the following questions: what was the relationship between elevation and stem dieback and did susceptibility to drought differ among functional groups or by leaf traits? In 2010, pre-drought, we measured leaf mass per area (LMA) on each species. In 2011, the percent of canopy dieback for each individual was visually estimated. Living canopy cover decreased significantly after the drought of 2011 and dieback decreased with elevation. There was no relationship between LMA and dieback within elevations. The negative relationship between proportional dieback and elevation was consistent in shrub and succulent species, which were the most common growth forms across elevations, indicating that dieback was largely driven by elevation and not by species traits. Growth form turnover did not influence canopy dieback; differences in canopy cover and proportional dieback among elevations were driven primarily by differences in drought severity. These results indicate that the 2011 drought in Big Bend National Park had a large effect on communities at all elevations with average dieback for all woody plants ranging from 8% dieback at the highest elevation to 83% dieback at lowest elevations.
Transactions of the Symposium on the Biological Resources of the Chihuahuan Desert Region, United States and Mexico by Wauer, Roland; Riskind, David. 1977
Europæisk slavehandel
International Migration in the Americas: First Report of the Continuous Reporting System on International Migration in the Americas (SICREMI) 2011.
p.; cm. Includes bibliographical references. (OEA Documentos Oficiales; OEA Ser.D)
Historie: Palæontologi: Laurasien.
Før Columbus, - Messoamerika. Oldtiden. Helleristninger / petroglyph.
Økonomihistorie: The American negotiator, or, The various currencies of the British colonies in America; as well the islands, as the continent [microfilm] : the currencies of Nova Scotia, Canada, New England, New York, East Jersey, Pensylvania [sic], West Jersey, Maryland, Virginia, North Carolina, South Carolina, Georgia, &c. and of the islands of Barbadoes, Jamaica, St. Christophers, Antigua, Nevis, Montserrat, &c. reduced into English money, by a series of tables suited to the several exchanges between the colonies and Britain, adapted to all the variations that from time to time have, or may happen : with tables reducing the current money of the Kingdom of Ireland into sterling, and the contrary, at all the variations of exchange : also, a chain of tables for the interchangeable reduction of the currencies of the colonies into each other, and many other useful tables relating to the trade in America (1765).
Biblioteksvæsen. Bogvæsen:
Aviser / Newspapers / journaux / Prensa / Tageszeitungen
Tidsskrifter, periodica / Journals, periodicals / Revues spécialisées, périodiques / Revistas, publicaciones periódicas / Zeitschriften, Periodika
Kunst / Art
Aktuelle og historiske politiske partier / Current and historical political parties
International organisering
Sociale bevægelser, herunder miljøorganisationer / Social movements, including environmental organizations:
Sociale forhold:
BNP, landbrug, fiskeri, industri.
Naturresourcer: Naturgas ;
Energi, erhverv, handel og industri:
Våbenfabrikker, våbenhandel og våbentransporter / Weapon Factories, arms trade and -transport / Les fabriques d'armes, le commerce des armes et de transport:
Se også: Amerika ; Caribien ; Latinamerika ; Mellemamerika ; Messoamerika ; Sydamerika ; Vestindien.

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