Clarion Island
Native name: Isla Clarión | |
---|---|
Geography | |
Location | Pacific Ocean |
Coordinates | 18°21′30″N 114°43′30″W / 18.35833°N 114.72500°W |
Archipelago | Revillagigedo Islands |
Total islands | 4 |
Major islands | San Benedicto, Socorro, Roca Partida & Clarión |
Area | 19.8 km2 (7.6 sq mi) |
Length | 8.6 km (5.34 mi) |
Width | 3.7 km (2.3 mi) |
Highest elevation | 335 m (1099 ft) |
Highest point | Mount (Monte) Gallegos |
Administration | |
Mexico | |
Demographics | |
Population | 9 |
Clarion Island (Spanish: Isla Clarión), formerly Santa Rosa, is the second largest, westernmost and most remote of Mexico's Revillagigedo Islands. The island is located 314 kilometres (195 mi) west of Socorro Island and over 700 kilometres (430 mi) from the Mexican mainland.
It has an area of 19.80 square kilometres (7.64 sq mi)[1] and three prominent peaks. The westernmost and tallest peak, Monte Gallegos, is 335 metres (1,099 ft) high. The central peak is called Monte de la Marina, 280 metres (920 ft), and the eastern peak Pico de la Tienda 292 metres (958 ft). The coasts are backed by perpendicular cliffs, 24 to 183 metres (79 to 600 ft) high, with the exception of the middle part of the southern coast in the vicinity of Bahía Azufre (Sulphur Bay), which is the location of a small military garrison with a contingent of 9 soldiers[citation needed].
Two small and at least temporarily brackish pools are the only source of fresh water; even these may dry up in summers with little rain.[2] Clarion can only be reached by sea, which from Mexico takes 30 hours.
History
No signs to indicate prehistoric human activity have ever been found on Clarion Island. It was visited in late 1542 by the Spanish navigator Ruy López de Villalobos, but with the exception of a possible re-sighting of the Revillagigedos by Juan Fernández de Ladrillero before 1574 and a short-lived residence by the adventurer Martín Yáñez de Armida on the island he later renamed Socorro (1606), the archipelago was neglected by the Spaniards. Joris van Spilbergen's sighting of the whole group in December 1615 seems not to have been noted in Spain or its American colonies.
Clarion was sighted again by the English privateer George Shelvocke on the Speedwell, August 21, 1721.
The name of the island goes back to the American brig Clarion, Capt. Henry Gyzelaar, who was engaged in the North Pacific trade around 1820.[3]
The Handbook of Selected Pacific Islands (1959), by Edwin B. Doran, observed that "Clarion has never been occupied by man for more than a few days at a time", adding that "there are no facilities of any sort at present."[4]
Ecology
As the
A few seabird species breed on Clarion or formerly did so. The island is near the north(east)ern limit of the breeding range of several of these, but their continued presence needs confirmation:
- Nazca booby, Sula granti
- East Pacific red-footed booby, Sula sula websteri – a doubtfully distinct subspecies
- East Pacific great frigatebird, Fregata minor ridgwayi – breeding suspected but not verified; a doubtfully distinct subspecies
For reasons not fully known, Clarion seems to be more attractive to
Endemic animals
- Clarión burrowing owl, Athene cunicularia rostrata[2]
- Clarión wren, Troglodytes tanneri (vulnerable)[2]
- Clarión mourning dove, Zenaida macroura clarionensis[2]
- Clarión Island whipsnake, Masticophis anthonyi
- Clarión Island tree lizard Urosaurus clarionensis
- Clarión nightsnake, Hypsiglena unaocularis[8]
In addition, the local population of the
The Clarión population of the
Plants
Endemic plant taxa of Clarion are:[9]
- Aristida tenuifolia
- Ipomoea halierca
- Physalis clarionensis
Brickellia peninsularis var. amphithalassa[10]Bulbostylis nesiotica, Cheilanthes peninsularis var. insularis, Cyperus duripes, Euphorbia anthonyi, Nicotiana stocktonii, Perityle socorrosensis, Spermacoce nesiotica and Zapoteca formosa ssp. rosei are Revillagigedo endemics which Clarion shares with either San Benedicto or Socorro. Whether Teucrium townsendii var. townsendii is the same plant as on San Benedicto is not conclusively determined.[9]
There has not been recent dedicated research on the impact the sheep and rabbits had on the local
References
Citations
- Dropseed (Sporobolus pyramidatus), and endemic Aristidatenuifolia: CMICD (2007)
- Engelmann's Prickly Pear(O. engelmannii): Brattstrom & Howell (1956)
Bibliography
- ^ [1], page 35 [dead link]
- ^ (PDF) from the original on 2016-01-12. Retrieved 2018-10-25.
- ISBN 0-919642-51-9
- ^ Doran, Edwin B. (1959). Handbook of Selected Pacific Islands. Pacific Missile Range. Retrieved 12 September 2022.
- ISBN 978-90-481-5686-3.
- ^ a b BirdLife International (2003): EBA Factsheet: Clarión Archived 2008-11-22 at the Wayback Machine. Retrieved 2007-NOV-22.
- ^ a b c BirdLife International (2007): Townsend's Shearwater – BirdLife Species Factsheet Archived 2007-09-29 at the Wayback Machine. Retrieved 2007-NOV-22.
- ^ a b c California/Mexico Island Conservation Database (CMICD) (2007): Plant accounts: Clarion Archived December 8, 2007, at the Wayback Machine. Retrieved 2007-NOV-22.
- ^ José Luis León de la Luz, Reymundo Domínguez-Cadena, Alfonso Medel-Narváez (2012). "Florística de la Selva Baja Caducifolia de la Península de Baja California, México" (PDF). Repositorio Institucional de CIBNOR. Archived (PDF) from the original on 2018-07-24.
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: CS1 maint: multiple names: authors list (link)
Further reading
- Johnston, Ivan M. (1931): The flora of the Revillagigedo Islands. Proceedings of the California Academy of Sciences (Series 4) 20(2): 9–104.
- Welsch, Bernhard (2001). "The Asserted Discovery of Marcus Island in 1694". The Journal of Pacific History. 36: 105–115. S2CID 161496300.
External links
- Scuba Diving at Clarion Island Archived 2017-07-16 at the Wayback Machine