Juan A. Torres

La vegetación edafohigrófila del distrito Guadiciano-Bastetano (Granada-Jaén, España)

Se realiza un estudio fitosociologico, sinfitosociologico y geosinfitosociologico de la vegetacion edafohigrofila desarrollada en las zonas humedas del distrito Guadiciano-Bastetano (sector Guadiciano-Bacense, subprovincia Betica, provincia Betica). Se reconocen dos geoseries y una microgeoserie de vegetacion que contienen un total de 46 fitocenosis. La peculiaridad de este distrito radica en su relacion con otras zonas semiaridas del centro, este y sudeste peninsular, que se refleja en la presencia de numerosas comunidades vegetales compartidas con los territorios aragoneses, manchegos y murciano-almerienses. No obstante, tambien contiene fitocenosis y taxones endemicos que aumentan su originalidad.

Analysis of the Juniperus oxycedrus L. communities in the centre and south of the Iberian peninsula (Spain and Portugal)

Abstract The survey deals with juniper groves of Juniperus oxycedrus, i. e. the edaphoxerophilous communities dominated by J. oxycedrus subsp. oxycedrus and J. oxycedrus subsp. lagunae in the centre and south of the Iberian Peninsula. The study of the vegetation has been carried out using the phytosociological method, complemented by a multivariate analysis to statistically process both bibliographical and field relevés. As a result, a new phytosociological alliance (Juniperion oxycedro-lagunae) encompassing four new associations (Pistacio terebinthi—Juniperetum lagunae, Stipo tenacissimae—Juniperetum lagunae, Echinosparto iberici—Juniperetum lagunae and Cytiso eriocarpi—Juniperetum lagunae) and the community of Phlomis purpurea and J. oxycedrus subsp. lagunae is proposed. These juniper groves are plant formations of general interest for the European Union and exhibit interesting endemic flora and vegetation.

Aportaciones al estudio de la alianza Trachynion distachyae Rivas-Martínez 1978 en el sector Subbético (Andalucía-España)

Torres, J. A., Garcia-Fuentes, A., Salazar, C. & Cano, E. Contribution to the study of the alliance Trachynion distachyae Rivas-Martinez 1978 in the Subbaetic sector (Andalusia, Spain). Lazaroa 21: 19-23 (2001). We have carried out a study on short pioneer xerophilous therophytic grasslands that colonise calcareous, non-nitrified soils that are poor in organic matter in the Subbaetic sector (Baetic subprovince); they belong to the phytosociological alliance Trachynion dystachiae. We propose a new association for the oro-Mediterranean thermotype (Jonopsidio prolongoi-Hornungietum petraeae) by providing information about its structure, synecology, synchorology, syntaxonomy and dynamics. betico-Maginense (TORRES, 1997), donde constituye