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El gènere Leptoneta Simon, 1872 (Araneae, Leptonetidae) a Mallorca : apunts biogeogràfics |
| Autor/es | Pons Buades, Guillem Xavier |
| Matèries en català: | Biologia. |
| Matèries en anglès: | Biology. |
| Resum-Abstract: | [cat] Se donen noves citacions de Leptoneta infuscata Simon, 1872 (Araneae, Leptonetidae), a l’illa de Mallorca. S'amplia la seva àrea de distribució de Mallorca, coneguda fins aleshores de la Serra de Tramuntana, a la Serra de Llevant. S'analitza l’ecologia i corologia de l’espècie a les coves de Mallorca. Hom fa una discussió biogeogràfica de la família Leptonetida. [eng] Karren landforms, as an effect of solutional erosion on limestone rocks controlled by a couple of physico-chemical factors, should have great interest in ecological studies providing information about past or present climates and yielding evidence of deforestation processes in karstic areas. A first approach to this use of different karren types to evaluate some ecological conditions has been essayed in the northern mountain ridge of Mallorca, named Serra de Tramuntana. Preliminary results obtained from 98 locations in the Serra suggest that a vertical zonation of karren landscapes can be easily established, and they also agree with the distribution of plant communities as well as with the main climatic gradients, like mean temperature and amount of precipitations. The most outstanding data have been provided by nearly 2000 morphometrical observations of rillenkarren measured in 40 different locations: they show significantly how longer rills appear at lower altitudes on warmer places whilst rills are only found widespread in karstic outcrops receiving more than 800 mm of annual rainfall. |
| Font: | Endins 1992, Vol. 17-18, pp. 61-66 |
| Identificador: | e-ISSN: 2386-7299 |
| Tipus de document: | info:eu-repo/semantics/article ; info:eu-repo/semantics/publishedVersion |
| Avís legal: | all rights reserved ; info:eu-repo/semantics/openAccess |