Browsing by Subject "Bryophyte"

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    The bryophyte diaspore bank in soils affected by the Aznalcóllar (Seville, SW Spain) mine disaster
    (Murcia: Universidad de Murcia, Servicio de Publicaciones, 2003) Ordóñez Sánchez, Alejandro; Cano Bernabé, María Jesús; Guerra Montes, Juan; Biología Vegetal; Facultad de Biología
    The tailings dam failure of the pyrite mine in Aznalcóllar released toxic tailings slurries and liquid that contaminated soils and water throug hout the Guadiamar basin. In this study we attempt to ascertain the recovery state of the zone four years after the dam failure, based on a study of the soil diaspore bank and the method of cultivating soil plots and determining the germinated species. Four localities were selected in the middle zone of the basin. Once the plots were established (five in each locality), they were divided into four groups, depending on the culture conditions. Soil samples were also taken for the analysis of heavy metals and edaphic parameters. Data seem to show that four years after the dam failure soils have started a slow recovery and hea vy metal levels are decreasing.
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    Schistidium convergens (Grimmiaceae, Bryophyta), a new species from southern Spain and Morocco
    (Schweizerbart Science Publishers, 2019-04-25) Jiménez-Martínez, Juan F.; Alonso García, Marta; Cano Bernabé, María Jesús; Gallego Morales, María Teresa; Guerra Montes, Juan; Biología Vegetal
    Schistidium convergens is described as a new species from southern Spain and northern Morocco, based on morphological and molecular data. The species is fully described and illustrated, its affinities are discussed in detail, and its current distribution mapped. The species is distinguished morphologically by its usually smooth leaf margins, sometimes with short papillae towards the leaf apex, recurved from the leaf base to the apex on both sides, rectangular basal leaf cells, quadrate to short-rectangular, subhyaline basal marginal cells with slightly thickened transverse walls, and irregular, isodiametric, quadrate to short rectangular, sometime oblate distal and medial exothecial cells. A table with characters to distinguish this species from S. apocarpum, the morphologically most similar species, and a phylogenetic analysis in order to detect relationships of the new species with nearby taxa based on the rDNA ITS region are provided. The new species is located in a clade with S. confertum, S. marginale and S. frigidum, among others.