ISSN: 2310-2799
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546,196 artículos
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Año:
1993
ISSN:
2340-5074, 0210-9506
Cabezudo, Baltasar; Pérez Latorre, Andrés V.; Navarro, Teresa; Nieto Caldera , José M.
http://publicacionesydivulgacion.uma.es/
Resumen
A phenomorphological analysis based on the study of phenological phases for persisting species in a Q. suber community was carried out. In order to do this, data from starting and maintenance of phenophases were taken for each species (flower buds formation, flowering, fruit setting, seed dispersal, brachyblast vegetative growth, dolichoblast vegetative growth, leaf shedding brachyblast and leaf shedding dolichoblast) as well as some ecomorphological characters: life form, seasonality, fruit type and leaf consistency. As an outcome, more favourable and unfavourable seasons for the community and the relation among phenological phases and local climate were characterized. Spring is the most favourable season for the community while Summer is the most unfavourable one. Vegetation shows multiseasonal phenological behaviour. Some species show different phenological pattern from community general pattern.
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Año:
1993
ISSN:
2340-5074, 0210-9506
El Oualidi, Jalal; Puech , Suzette
http://publicacionesydivulgacion.uma.es/
Resumen
The section polium of the genus Teucrium (Lamiaceae) is composed of groups of taxa that set problems of determination. This difficulty is the direct consequence, for a great number of taxa, of a lack of stable characters at the level of the species. This paper presents some morphological markers at different integration levels, the taxonomic value of which was tested in a biosystematic study we carried out, based on multiple characters.
Among these diagnostic characters we quote the proximal lobes and the trichomes of the throat of the corolla at the level of the subsection ; the leaves crenellated from the base, the shape of the calyx at the level of the group of species ; the simple and bifide trichomes at once, the presence of adventive roots at the level of polytypical species ; and some other characters at the level of non-dimensional species (or reduced-areas species) such as the plagiotropism of secondary and tertiary axes of inflorescence, the flower architecture, the presence more or less marked of proximal lobes and the seed surface.
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Año:
1993
ISSN:
2340-5074, 0210-9506
San Martín Padovani, Cristina; Medina Jaramillo, Ricardo; Ojeda Nempu, Pedro; Ramírez García , Carlos
http://publicacionesydivulgacion.uma.es/
Resumen
A phytosociological study of the aquatic and swampy vegetation of the Nature Sanctuary of «Río Cruces» in Valdivia, Chile is given. Three submersed associations (Potametum lucentis, Egerietum densum and Myriophylletum aquaticutn), three floating associations (Polygono-Ludwigietum peploidis, Myriophyllo- Potametum linguatii and Utriculario-Nymphaetum albae) and three emerged associations (Scirpetum caltforniae, Alismo-Sagittarietum montevidensis and Loto-Cyperetum eragrostidae) were determinated. Also, two prairies associations (Juncetum microcephalii and Juncetum procerii) and one forest association (Blepharocalyo-Myrceugenietum exsuccae) were described and the presence of one scrub association (Rubo-Blechnetum chilensis) were established. Finally, the syntaxonomical and spatial-temporal position of each plant association in the littoral zonation and succession were analyzed.
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Año:
1993
ISSN:
2340-5074, 0210-9506
Aparicio , Abelardo
http://publicacionesydivulgacion.uma.es/
Resumen
Conserving plant diversity in nowadays a main goal for Man due to the magnitude of ecological deterioration in the Biosphere. The present paper is an pioneer study in preserved areas in Spain dealing with the chorological, ecological, karyological and, to some extent, biological analysis of 57 taxa in the Parque Natural de la Sierra de Grazalema. Seed and seedlings are also described and UICN categories are proposed.
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Año:
1993
ISSN:
2340-5074, 0210-9506
Arista , Montserrat
http://publicacionesydivulgacion.uma.es/
Resumen
Seed germination and seedling survival of Abies pinsapo Boiss. were studied in three diferent habitats of Sierra de Grazalema (Cádiz): in a gap-forest, under canopy and outside forest. Highest germination of seeds took place outside forest, but seedlings died quickly. Inside forest, the gap was the best place for germination of seeds and seedling survival.
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Año:
1993
ISSN:
2340-5074, 0210-9506
Muñoz Colomina , Itziar
http://publicacionesydivulgacion.uma.es/
Resumen
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Año:
1993
ISSN:
2340-5074, 0210-9506
Monasterio Huelin , Elena
http://publicacionesydivulgacion.uma.es/
Resumen
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Año:
1993
ISSN:
2340-5074, 0210-9506
Rodríguez Nozal , Raúl
http://publicacionesydivulgacion.uma.es/
Resumen
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Año:
1993
ISSN:
2340-5074, 0210-9506
Ríos Ruiz, Segundo; Robledo Miras, Antonio; Alcaraz Ariza, Francisco
http://publicacionesydivulgacion.uma.es/
Resumen
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Año:
1993
ISSN:
2340-5074, 0210-9506
Ríos, Segundo; Robledo, Antonio; Alcaraz , Francisco
http://publicacionesydivulgacion.uma.es/
Resumen
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