Montague Island, known in Spanish as Isla Montague, is an island at the mouth of the Colorado River in the municipality of Mexicali, Baja California, Mexico, and is part of the Colorado River Delta and part of a broader region called the Salton Trough. It is about 32 km (20 mi) in length along its longest axis.[1]
The Colorado River Delta region experiences some of the highest tidal ranges in the world, up to 10 metres (33 ft), and at the highest tides, Montague Island is completely inundated. Although the islands in the delta have changed much over time, a map of the region shows Montague Island in 1873.[2] The island is uninhabited, as the climate is very hot, arid and the area occasionally floods.[1] The nearest inhabited town is El Golfo de Santa Clara.
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Ecology
The climate in the region of the Island is extremely hot and arid, with average annual rainfall of 2.4 in (60 mm). Montague Island, as part of the Colorado river delta, has had its ecology radically altered by diversion and use of water upstream in the river. The only water reaching the delta, with the exception of occasional floods, is agricultural wastewater.[1]
At least seven species of water birds are known to breed on Montague Island. The island is one of two known active breeding colonies of elegant tern in Mexico.[3] During two years, a large number of nests were destroyed by tidal flooding, but there were only low levels of nests lost to predation.[4] The birds nesting on Montague Island have reacted strongly to El Niño, with brown boobies being replaced by blue-footed boobies, and an increase in nesting of least, elegant, and royal terns, as well as black skimmers.[5]
Montague Island is one of the few locations where Mulinia coloradoensis, an endangered species of clam, is found. This species was once extremely abundant near the mouth of the Colorado river, but now only exists in a few isolated places. The decline of this clam is explained by the increase in salinity of the water due to diversion of and use of water from the Colorado river.[6]
Energy resources
In 1981, Pemex discovered natural gas near the island, prompting a scramble for oil and gas leases in the nearby city of Yuma, Arizona.[7] The area has also been studied for the potential use of tidal power.[8]
References
- ^ a b c The Delta of the Colorado River, David L. Alles (ed.), Western Washington University, August 6, 2006.
- ^ Geology of the Salton Trough Archived 2010-06-06 at the Wayback Machine, David A. Alles (ed.), Western Washington University, Edited May 28, 2005.
- ^ Eduardo Palacios; Eric Mellink (1993). "Additional Records of Breeding Birds from Montague Island, Northern Gulf of California". Western Birds. 24 (4): 259–262.
- ^ E. Peresbarbosa; E. Mellink (2001). "Nesting Waterbirds of Isla Montague, Northern Gulf of California, Mexico: Loss of Eggs due to Predation and Flooding, 1993–1994". Waterbirds. 24 (2): 265–271. doi:10.2307/1522040. JSTOR 1522040.
- ^ Antonio Badan (2003). "The effects of El Niño in Mexico: A survey" (PDF). Geofísica Internacional. 42 (3): 567–571. Bibcode:2003GeofI..42..567B. doi:10.22201/igeof.00167169p.2003.42.3.945. S2CID 73651874.[permanent dead link]
- ^ Carlie A. Rodriguez; Karl W. Flessa; David Le Dettman (2001). "Effects of Upstream Diversion of Colorado River Water on the Estuarine Bivalve Mollusc Mulinia coloradoensis" (PDF). Conservation Biology. 15 (1): 249–258. doi:10.1046/j.1523-1739.2001.99463.x.
- ^ "Find prompts scramble", The Courier, Vol. 90, No. 152, Aug 4, 1981.
- ^ S. Sheth; M. Shahidehpour (2005). "Tidal energy in electric power systems". IEEE Power Engineering Society General Meeting, 2005. pp. 1877–1882. doi:10.1109/PES.2005.1489454. ISBN 0-7803-9157-8. S2CID 29198703.
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31°44′18″N 114°44′47″W / 31.73833°N 114.74639°W
This page was last edited on 21 November 2023, at 08:32