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Wei-Assipu-tepui, also known as Little Roraima or Roraimita,[2] is a minor tepui of the Eastern Tepuis chain. It lies just off the northeastern flank of Roraima-tepui, directly on the border between Brazil and the disputed Guayana Esequiba territory, claimed by Venezuela but controlled by Guyana, and very close to the tripoint of all three countries.[3] The mountain is known for its extensive cave systems, with one extending for over a kilometre.[3]
| Wei-Assipu-tepui | |
|---|---|
 Landsat image of the southern part of the Eastern Tepuis chain. The two large central plateaus are Kukenán-tepui (left) and Roraima-tepui. Wei-Assipu-tepui is the small peak to the northeast of Roraima. Also visible in the top left of the frame is Yuruaní-tepui. | |
| Highest point | |
| Elevation | 2,400 m (7,900 ft)[1] |
| Coordinates | 05°13′08″N 60°42′18″W |
| Geography | |
  Wei-Assipu-tepui Location in Guyana | |
| Location | Roraima, Brazil / Cuyuni-Mazaruni, Guyana |
Wei-Assipu-tepui has a maximum elevation of around 2,400 metres (7,870 ft).[1] Its summit plateau is highly dissected and generally inclined south-southwest (towards the Brazilian side).[3] The rocky summit is partially forested, with flowering plants of the genus Bonnetia featuring prominently.[4] It also hosts a number of carnivorous plants, including Heliamphora glabra, Heliamphora nutans, and the natural hybrid between the two.[2] The various rock cavities of Wei-Assipu-tepui are home to nesting colonies of white-collared swifts (Streptoprocne zonaris) and oilbirds (Steatornis caripensis).[3] For the latter species, Wei-Assipu-tepui is the easternmost recorded locality in mainland South America, and the first known nesting site in Brazil.[3] The mountain's summit supports a greater variety of herpetofauna than the less vegetated plateaus of nearby Roraima-tepui, Kukenán-tepui, Yuruaní-tepui, and Ilú-tepui.[1] Day temperatures of 17 °C have been recorded on the summit plateau, falling to 12 °C overnight, with slightly lower values in the more sheltered caves.[4]
In the first expedition of its type to Wei-Assipu-tepui, an Italian–Venezuelan team of speleologists explored the mountain's summit plateau in July 2000, surveying four caves and several minor cavities.[3][5] On this expedition were also discovered four previously unknown species of frogs (one of which was later described as Oreophrynella weiassipuensis[6]), and at least two of harvestmen.[4]
According to Carreño et al. (2002), the oldest biblio-cartographic reference to the mountain is likely that of Marie Penelope Rose Clementi (wife of Cecil Clementi), circa 1920,[7] who recounted how its location was determined with a prismatic compass during an English expedition of 1915.[3]
| Name | Extent | Depth | Altitude |
|---|---|---|---|
| Sima de los Guácharos de Wei-Assipu-tepui | 1,194 m (3,917 ft) | 111 m (364 ft) | 2,280 m (7,480 ft) |
| Sima Wei-Assipu-tepui Oeste | 280 m (920 ft) | 92 m (302 ft) | ~2,100 m (6,900 ft) |
| Abrigo Superior de Wei-Assipu-tepui | 136 m (446 ft) | 20 m (66 ft) | 2,355 m (7,726 ft) |
| Hotel de Wei-Assipu-tepui | 54 m (177 ft) | 4 m (13 ft) | 2,330 m (7,640 ft) |
| "Gruta de la Colecta" de Wei-Assipu-tepui | 20 m (66 ft) | 3 m (9.8 ft) |
See also
References
- MacCulloch, R.D., A. Lathrop, R.P. Reynolds, J.C. Señaris & G.E. Schneider (2007). "Herpetofauna of Mount Roraima, Guiana Shield region, northeastern South America" (PDF). Herpetological Review 38(1): 24–30.
- McPherson, S., A. Wistuba, A. Fleischmann & J. Nerz (2011). Sarraceniaceae of South America. Redfern Natural History Productions, Poole.
- (in Spanish) Carreño, R., J. Nolla & J. Astort (December 2002). Cavidades del Wei-Assipu-tepui, Macizo del Roraima, Brasil. Boletín de la Sociedad Venezolana de Espeleología 36: 36–45.
- (in Spanish) Villarreal, O., C. Señaris & C. DoNascimiento (December 2002). Contribución al conocimiento faunístico del Wei-Assipu-tepui, Macizo del Roraima, con énafasis en la anurofauna y opiliofauna. Boletín de la Sociedad Venezolana de Espeleología 36: 46–50.
- Urbani, F., P. Compère & L. Willems (December 2005). Opal-A speleothems of Wei-Assipu-tepui, Roraima Province, Brazil. Boletín de la Sociedad Venezolana de Espeleología 39: 21–26.
- Señaris, J.C., C. DoNascimiento & O. Villarreal (2005). A new species of the genus Oreophrynella (Anura; Bufonidae) from the Guiana Highlands. Papéis Avulsos de Zoologia 45(6): 61–67. doi:10.1590/S0031-10492005000600001
- "Mrs. Cecil Clementi" (c.1920). Through British Guiana to the Summit of Roraima. E. P. Dutton and Company, New York.
Further reading
- (in Spanish) Carreño, R., J. Nolla & J. Astort (2001). Resultados preliminares de la expedición espeleológica Italo-Venezolana al Macizo del Roraima. VI Jornadas Venezolanas de Espeleología, Noviembre 2001, Maracay. Resúmenes, pp. 19–21.
- Désamoré, A., A. Vanderpoorten, B. Laenen, S.R. Gradstein & P.J.R. Kok (30 September 2010). Biogeography of the Lost World (Pantepui region, northeastern South America): insights from bryophytes. Phytotaxa 9: 254–265.
- Kok, P.J.R., D.B. Means & F. Bossuyt (30 June 2011). A new highland species of Pristimantis Jiménez de la Espada, 1871 (Anura: Strabomantidae) from the Pantepui region, northern South America. Zootaxa 2934: 1–19.
- Kok, P.J.R., R.D. MacCulloch, D.B. Means, K. Roelants, I. Van Bocxlaer & F. Bossuyt (7 August 2012). "Low genetic diversity in tepui summit vertebrates" (PDF). Current Biology 22(15): R589–R590. doi:10.1016/j.cub.2012.06.034 ["supplementary information" (PDF).]
External links
- Return to the Tepuis — National Geographic film about expedition to Wei-Assipu-tepui
На других языках
- [en] Wei-Assipu-tepui
[fr] Tepuy Wei-Assipu
Le tepuy Wei-Assipu est un des tepuys situé au Guyana, non loin de la frontière avec l'État du Roraima au Brésil et avec l'État de Bolívar au Venezuela.Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.
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