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Publication Date

January 2014

Abstract

A total of, 160 terrestrial troglobiont species are known to date in the Canary Islands. These species are mainly located on the youngest islands that have abundant volcanic tubes (Tenerife, La Palma and El Hierro). On Gran Canaria, an older island with few volcanic caves, the hypogean fauna was considered poor until recent explorations in the mesocavernous shallow substratum and water mines were carried out, with remarkable results. The island covers an area of 1,560 km² and has a maximum height of 1,949 m. As ecological diversity is high, it is fundamental to identify the best areas to conduct effective sampling. Software for species habitat modelling such as MaxEnt, can be useful to select such areas, creating species distribution maps from environmental data. We obtained a potential distribution map using MaxEnt and including all the known troglobiont species of the island. This predictive map is statistically significant and accurately classifies a high percentage of the observed data. Lithology and average rainfall are the two variables that best predict the presence of these species. Basaltic materials —preferably modern— and gravitational landslides are good places for finding subterranean fauna. Locations with high average rainfall appear to be the most appropriate for this purpose.

Notes

Arxius de Miscel·lània Zoològica, Vol. 12 (2014).

Keywords

Troglobionts, Fauna, Modelling, Sdm, Habitat, Gran Canaria, Canary Islands

Description

RDA

Subject: topical

Troglobionts; Fauna; Modelling; Sdm; Habitat; Gran Canaria; Canary Islands

Type

Article

Genre

serial

Identifier

K26-05753

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