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	SYSTEMATIC LIST OF BIRDS OF MEXICO (Site not responding. Last check: 2007-09-05)
		2 at Celestún (YU) and 1 at the Usumacinta Marshes.
		25+ at Celestún (YU), 2 at the Usumacinta Marshes.
		2 at Celestún (YU) and 4 at the Usumacinta Marshes.
	www.birdtours.co.uk /tripreports/mexico/mexico2/MEX2.htm (3466 words)

	Usumacinta River \| Planeta (Site not responding. Last check: 2007-09-05)
		The Usumacinta River is the largest river in Mesoamerica (seventh-largest in the world) and is shared by Mexico and Guatemala.
		The ecological and hydrological integrity of the Usumacinta watershed faces numerous threats from deforestation, hydroelectric development, and mineral exploitation on both sides of the border.
		Almost half (42 percent) of Guatemala is drained by the Usumacinta.
	www.planeta.com /ecotravel/mexico/usumacinta.html (462 words)

	Usumacinta River \| Planeta
		The Usumacinta is the longest river in Mesoamerica.
		The region drained by the Usumacinta is one of the most biologically diverse in the world, and represents the northern limits of tropical forest ecosystems in the Western Hemisphere.
		The Usumacinta River was a center of ancient Maya culture, which used the river and it's network of tributaries for trade and travel.
	www.planeta.com /ecotravel/mexico/usumacinta2.html (3423 words)

	[No title]
		Draining the Lacandon jungles adjacent to the Mexico-Guatemala border, the Usumacinta is embraced by North America’s largest remaining tropical rain forest.
		The Usumacinta, which translates from the Mayan language as "sacred monkey," is also known as the River of Ruins.
		During the Usumacinta river trip, rafters will visit the ceremonial ruins of Yaxchilan and Piedras Negras, which are accessible only by air and water.
	www.e-raft.com /Regions/Mexico/RioUsumacinta.asp (174 words)

	Terrestrial Ecoregions -- Usumacinta mangroves (NT1437)
		Usumacinta mangrove ecoregion is located in the state of Tabasco, Mexico.
		The Usumacinta mangrove ecoregion forms part of the Biosphere Reserve of Pantanos de Centla, which was established in 1992, and were designated as a wetland of international importance under the RAMSAR convention in 1995 (Frazier 1999).
		Federal protection has begun, and a management plan for the area is currently being undertaken to prevent accelerated habitat loss, and to introduce the idea of sustainable natural resource use in such a rich and biologically diverse ecoregion; one of the most important wetlands in Mexico.
	www.worldwildlife.org /wildworld/profiles/terrestrial/nt/nt1437_full.html (1146 words)

	Chris Shaw - featured online Planeta.com
		Christopher Shaw is the author of Sacred Monkey River, a highly recommended tome that traces the author's trips running the great Usumacinta River on the border of Guatemala and Mexico.
		One of the first events was a conference of scientists on the implementing cross-border conventions to protect the Usumacinta watershed.
		All these were of course fairly theoretical, with little government support, but they did do a lot of consciousness raising, and put together good maps of the Selva Lacandona, Maya Biosphere Reserve and contiguous wildlands in Yucatan, Quintana Roo, and Belize, showing where stress points and protected areas converged and diverged.
	www.planeta.com /planeta/01/0108qachrisshaw.html (944 words)

	Usumacinta. The Columbia Gazetteer of North America. 2000
		Usumacinta (oo-soo-mah-SEEN-tah), river, c.600 mi/966 km long, extreme S Mexico; formed by the Chixoy and Pasión rivers; flows NE through Tabasco state to the Bay of Campeche; 18°24'N 92°38'W. Demarcates the Guatemalan-Mex. border for c.70 mi/113 km.
		Navigable for c.300 mi/483 km upstream by small boats and is used to move logs and chicle downstream.
		Near its mouth some of the channels of the Usumacinta merge with the Grijalva R. The Columbia Gazetteer of North America.
	www.bartleby.com /69/87/U01487.html (118 words)

	Sierra del Lacandon - project overview - hydrology
		The Pantanos de Centla lagoon complex at the mouth of the Usumacinta was designated a biosphere reserve in 1992 and is considered to be one of the most important coastal wetlands in Mesoamerica.
		The Rio Usumacinta currently provided the majority of the systems freshwater inputs and during low flow periods (Fig 6) saltwater intrudes some 30 km upstream.
		Large dams, like those proposed for the Rio Usumacinta at Boca del Cerro, are known to alter upstream and downstream aquatic habitat and act as barriers to the migration of aquatic species.
	www.sierralacandon.org /po-hydrology.html (940 words)

	Specter of Usumacinta Dam Lingers
		But the people living on both sides of the Usumacinta are not convinced that plans have been buried.
		Writers Ariel Dorfman and Margo Glantz, artists Leonora Carrington and Francisco Toledo, among many others, stressed in the letter that the water of the Usumacinta forms the backbone of one of the regions of greatest biological vitality and cultural relevance in the world.
		The Usumacinta is the most voluminous river of Mexico and "the third in Latin America as far as electrical production potential.
	www.tierramerica.net /2003/0202/iacentos.shtml (757 words)

	[No title]
		This river is one of the main tributaries of the Usumacinta river, one of the largest rivers in the Central America.
		The Usumacinta River is easier to navigate, leads to a more desirable place to live and moves away from the Olmec's or Jaredites.
		The Usumacinta River seems like the more likely choice because (1) it takes them farther from the Jaredites, (2) the river is easier to navigate and (3) the Peten is a more desirable place to live when compared with the dry basins of Chiapas.
	www.lightplanet.com /response/BofM/ceibal.htm (3583 words)

	World Monuments Watch (Site not responding. Last check: 2007-09-05)
		Rising to preeminence on the banks of the Usumacinta in the sixth and seventh centuries a.d., the sites reached their apogee in the mid-eighth century when most of the temples, palaces, pyramids, and ballcourts we see today were constructed.
		In antiquity, the Usumacinta, which now separates Guatemala and Mexico, served as a commercial highway for dugout canoes laden with exotic goods moving from the highlands of Guatemala and Chiapas to the Gulf of Mexico.
		Both Yaxchilán and Piedras Negras have been threatened by looting, erosion, exposure to the elements, exuberant vegetation, and, in the case of Piedras Negras, the outmoded excavation techniques of the early twentieth century.
	www.wmf.org /html/programs/guausu.html (422 words)

	[No title]
		Electricity from the proposed Usumacinta dams is included in these power grid schemes.
		The Usumacinta is the largest river in Mexico south of the Rio Grande.
		Potential problems to the dams include the destruction of hydroelectric equipment by hydrogen sulfide produced by decomposing forest vegetation and the premature siltation of reservoirs caused by the destruction of the surrounding forest.
	sandelman.ottawa.on.ca /dams/SOUTHAMERICA/MEXICO/Mexico-UsumacintaDam (886 words)

	Usumacinta River! A whitewater rafting adventure in Mexico with Quest Expeditions.
		The River of Ruins Expedition on the mighty Usumacinta River is a true adventure into one of the most exotic places on earth.
		The Usumacinta flows past cascading waterfalls, through big rapids and into spectacular canyons.
		Veracruz is free of the political troubles that may be present in the Usumacinta area.
	www.questexpeditions.com /m-ruins.htm (847 words)

	Usumacinta River -- Encyclopædia Britannica
		Spanish Río Usamacinta, river in southeastern Mexico and northwestern Guatemala, formed by the junction of the Pasión River, which arises in the Sierra de Santa Cruz (in Guatemala) and the Salinas River, also known as the Chixoy, or the Negro, which descends from the Sierra Madre de Guatemala.
		More results on "Usumacinta River" when you join.
		Occupying the coastal lowlands south of the Isthmus of Tehuantepec and north of the Yucatán Peninsula, the Tabasco Plain is a hot and humid land made up of alluvial materials deposited by the Grijalva and Usumacinta rivers and is covered with dense, tropical forest.
	www.britannica.com /eb/article?tocId=9074541 (851 words)

	Reports Submitted to FAMSI - Armando Anaya Hernandez
		Panhale is located on a scarped hill, which lies on the right-hand bank of the Usumacinta River (Figure 2).
		Descending down the Usumacinta and after sorting the treacherous rapids of San Joseito, one must pass by Panhale en-route to Pomoná.
		It is precisely at Boca del Cerro that the mighty Usumacinta begins a more sinuous and sluggish course into the Tabasco Coastal plain.
	www.famsi.org /reports/00082/section01.htm (630 words)

	En;News,Environmentalists protest Usumacinta dam project,Dec 04 (Site not responding. Last check: 2007-09-05)
		Critics of the project gathered at a press conference yesterday to decry the potential disasters posed by large-scale tampering with Usumacinta's free-flowing waters.
		Instead of provoking such far-reaching damage, those opposed to the dam have suggested the creation of a bi-national riparian corridor between Mexico and Guatemala, together with investment in alternative development and power generation initiatives and low-impact tourism.
		Usumacinta is "too attractive for the hydro-engineers of the world to avoid," says Christopher Shaw, author of Sacred Monkey River.
	www.eco.utexas.edu /~archive/chiapas95/2002.12/msg00184.html (471 words)

	Maya Sites Face Flooding
		Archaeologists working in the Usumacinta River basin--many of whom are advisers to the electricity commission--have established that the dam would inundate a largely unexplored area near the Guatemalan border they believe to have been the seventh-century Maya kingdom of Ponomá.
		This is the third time since 1987 that the Mexican government has made plans to dam the Usumacinta, which is the longest river in Mesoamerica and the most torrential in Mexico.
		But a dam site at Boca del Cerro would harness the Usumacinta at its greatest velocity, and governmental plans that appear on the website "México Tercer Milenio" describe the Boca del Cerro project as "a strong priority" that has the capacity to be the most productive hydroelectric dam in Mexico.
	www.archaeology.org /online/news/usumacinta.html (1333 words)

	LACANDON RAIN FOREST REGION/MEXICO/CPD SITE MA1
		In eastern Chiapas between 16°05'-17°45'N and 90°25'-91°45'W, between the Usumacinta River and the Perlas and Lacantún rivers.
		The largest remaining segment of this northern tropical rain forest is along the eastern edge of the highlands of Chiapas, Mexico's southernmost state.
		The Usumacinta Basin and Grijalva Basin (farther west) contain one third of the freshwater resources of Mexico.
	www.nmnh.si.edu /botany/projects/centres/lacandon.htm (3202 words)

	Usumacinta on Encyclopedia.com (Site not responding. Last check: 2007-09-05)
		It is navigable for c.300 mi (480 km) upstream by small boats and is used to move logs and chicle downstream.
		Near its mouth some of the channels of the Usumacinta merge with the Grijalva River.
		Biografía del acuarelista Gómez Ventura, por Jiménez Méndez.(El otro canto del Usumacinta.
	www.encyclopedia.com /html/U/Usumacin.asp (278 words)

	Terrestrial Ecoregions -- Usumacinta mangroves (NT1437)
		The Usumacinta mangroves and nearby flooded lowlands are considered one of the most important wetlands in Mexico.
		The climate here is warm and humid with abundant rains in the summer, and the mangroves in this region receive about 63 inches (1600 mm) of rain per year.
		In the tranquil waters of the Usumacinta mangroves ecoregion, endangered manatees float peacefully among white and fl mangrove trees.
	www.nationalgeographic.com /wildworld/profiles/terrestrial/nt/nt1437.html (472 words)

	UGAM - Usumacinta Realidad Amenazada
		Asimismo, la cuenca del río Usumacinta contiene tres regiones terrestres prioritarias por su valor de conservación: la Selva Lacandona, las Lagunas de Catazajá-Emiliano Zapata y los Pantanos de Centla.
		El Usumacinta desemboca en uno de los deltas más grandes de mesoamérica, la presencia de diversas especies animales y vegetales indican un grado de conservación plausible; por lo tanto el delta del Usumacinta, es una importante zona de refugio, crianza, alimentación y reproducción de diversos grupos de cheloneos, reptiles, aves, peces, crustáceos, mamíferos e invertebrados.
		Guatemala niega estar de acuerdo con el megaproyecto de las presas en el Usumacinta, debido a los daños tan serios que su construcción propiciará, además de la importante protesta que han dado los grupos ambientalistas de ambos lados del Río (mexicanos y guatemaltecos), en contra de esta obra.
	www.union.org.mx /articulos/usumacinta.html (1719 words)

	[No title]
		THE USUMACINTA RIVER The Usumacinta River is the seventh largest shared watershed in Latin America and drains some of the most significant remaining tropical forest in region, often referred to as the Maya Forest.
		Among the key threats facing the River are sedimentation resulting from rapid deforestation and poor agricultural practices in the watershed, potential contamination from petroleum exploration and production in both countries, continued interest in the hydroelectric capacity of the River, and the introduction of exotic fish species.
		During the Rio Usumacinta Round Table, the organizers prepared an issue paper concerning hemispheric shared water resources for consideration at the upcoming Dialogue.
	grove.ufl.edu /~meso/project2.html (755 words)

	INFORMACION PPP 2003 (Site not responding. Last check: 2007-09-05)
		According to a reliable source, this internal report appeared in late October and is the CFE's latest plan for the Usumacinta river.
		Four new dams are being considered to the south of Boca del Cerro along an 89km stretch of the Usumacinta where it forms Mexico's border with Guatemala.
		Two dams known as Huixtan I and Huixtan II along the Santo Domingo river, an important tributary to the Usumacinta, are under consideration.
	www.mesoamericaresiste.org /primeras/segundas/2003ingles.html (3334 words)

	Dams on the Usumacinta? (Site not responding. Last check: 2007-09-05)
		She said that there >>> >were plans to put a series of dams along the Usumacinta river in order to >>> >provide for more electric power for Cancun.
		For the time being, >>however, there are no "active" plans for dam projects on the scale of >>those proposed in the 1980s and early '90s.
		I encourage you and anybody else who cares about >>Yaxchilan, Piedras Negras and the Usumacinta to press the Mexican, >>Tabascan and Chiapan--and Guatemalan--governments, and the press, to >>investigate the bandits at La Linnea and make the Usumacinta safe again.
	www.rivergeek.com /usudams.html (631 words)

	The Threat of Dams and Flooding to Archaeological Sites along the Usumacinta River
		The Usumacinta River Basin covers an expansive area that includes much of Guatemala and Southern Mexico.
		For several decades now, various plans have been put forward to harness the river's energies through a series of dams placed along its middle route, where it forms the border between the Mexican state of Chiapas and the Guatemalan department of the Peten.
		Although most observers recognize the potential economic value of producing hydroelectric power on the Usumacinta, the cost to the cultural patrimony of Guatemala and Mexico is unknown.
	www.nadir.org /nadir/initiativ/agp/free/colombia/puebla/usumacintadams.htm (752 words)

	CIEPAC: Chiapas al Día, No. 301 (Site not responding. Last check: 2007-09-05)
		The study made by the Federal Electrical Commission (CFE) called “Geological explorations for hydroelectric projects on the Usumacinta River, Chiapas” carried out by Gustavo Arvizu Lara and Moises Davila Serrano in April of 1987 affirms that “The Usumacinta River, the river with the largest capacity in the country, is the border between Mexico and Guatemala.
		In the same way, projects are justified with the goal of giving energy to the Gulf area to control coastal inundations provoked by deforestation, as well as direct energy to the Yucatan peninsula, that within the framework of the PPP will be inundated with industrial parks, maquiladoras and agro-export centers.
		For the National “Third Millennium Mexico” Project, the total area that will be flooded in the Usumacinta Basin will be 725 square kilometers, that is equal to 72,500 hectares of indigenous lands and jungle, of which 425 square kilometers correspond to Mexican territory and 300 square kilometers to Guatemalan territory.
	www.ciepac.org /bulletins/ingles/ing301.htm (2601 words)

	Usumacinta River Guide \| 18/9/2002
		Discussions are underway to dam the river in seven locations for hydroelectric projects which would flood both the Yaxchilan ruins in Chiapas and parts of Guatemala's Lower Peten.
		The issue of damming the river has resurfaced — so to speak — in 2001 and 2002 via the development of the Plan Puebla Panama.
		Threat of Dams on the Usumacinta River: http://www.sierralacandon.org/usumacintadams.htm
	www.nadir.org /nadir/initiativ/agp/free/colombia/puebla/0918usumacinta.htm (357 words)

	LIST OF THE RECORDED SPECIES
		White-tailed Hawk (Buteo albicaudatus)One at Coba; one on road 186 in the Usumacinta's; and two at Celestun.
		Crested Caracara (Caracara plancus)Quite common in the Usumacinta's especially the road from Emiliano Zapata to La Libertat.
		Hooded Yellowthroat (Geothlypis nelsoni)Quite common at Coba; Tikal and the Usumacinta's.
	home.zonnet.nl /michiel.1/centralam/chklst.htm (4290 words)

	new departures fixed dates
		We will set up camp on a white sand dune after enjoying a full afternoon at the impressive site of Yaxchilan, still used to this day as a place of worship and ceremony by the Lacandon Maya.
		This unique site is strategically located atop a knoll set on a natural omega formed by the Usumacinta River.
		Continue upriver until we reach La Estrella, where we will camp on a river dune where the waters of the Pasion and Salinas rivers meet to form The Great Usumacinta.
	www.usumacinta.org (931 words)

	Usumacinta
		No it's not in the Usumacinta, but it may be the largest freshwater fish ever caught, found in the Mekong River.
		From Tabasco Hoy to CNN, Lacatunia Enigmatica is finally hitting the news after millions of years in the Usumacinta watershed.
		Discovery of new families of living vertebrates is rare; in ichthyology there have been just two new families discovered in the past 60 years: the coelacanth in 1938 and the megamouth shark in 1983.
	www.gomaya.com /dams (324 words)

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