Canadell J, López Soria L (1998) Lignotuber reserves support regrowth following clipping of two Mediterranean shrubs. Functional Ecology 12:31-38.
CREAF (1998) CREAF 1988-1998. CREAF, Bellaterra, 80 pp.
Ribas A, Filella I, Gimeno BS, Peñuelas J (1998) Evaluation of tobacco cultivars as bioindicators and biomonitors of ozone phytotoxical levels in Catalonia. Water, Air and Soil Pollution 107:347-365.
Ribas A, Peñuelas J, Gimeno BS, Filella I (1998) Climate change and plant ozone damage in the mediterranean region. The Earth's Changing Land GCTE-LUCC Open Science Conference on Global Change Abstracts. Institut Cartogràfic de Catalunya, Barcelona, pp. 187.
Avila A, Alarcón M, Queralt I (1998) The contribution of North African inputs to a holm oak forest ecosystem biogeochemical cycle. Annales Geophysicae 15:
Avila A, Gallart F (1998) La recerca hidrològica en petites conques instrumentades. Mètodes i utilitat aplicada. Espais 44:17-22.
Marcer A, Pons X (1998) Park GIS implementation. In Proceedings of the International Conference and Exhibition on Geographical Information,GisPlaNet'98. Lisboa, edició en CD-ROM, paper 068.
Marcer A, Pons X, Vicens J, Falgarona J (1998) Proyecto " Vulcà" . Desarrollo de un Sistema de Información Geográfica para la Gestión del Parque Natural de la " Zona Volcànica de la Garrotxa"
Broncano M.J., Riba M., Retana J. (1998) Seed germination and seedling performance of two Mediterranean tree species, holm oak (Quercus ilex L.) and Aleppo pine (Pinus halepensis Mill.): A multifactor experimental approach. Plant Ecology. 138: 17-26.EnllaçDoi: 10.1023/A:1009784215900
A two-level multifactor experimental approach was used to compare seed germination and seedling performance of two Mediterranean tree species: the early successional aleppo pine (Pinus halepensis Mill.) and the late successional holm oak (Quercus ilex L.). In a first experiment germination rate was evaluated under the combined effects of shade, nitrogen availability, and pine or holm oak leaf litter. In a second experiment we tested for the effects of shade, nutrient availability, and litter type on seedling survival, growth and biomass allocation. Holm oak showed higher germination rates under shaded than under unshaded conditions, while Aleppo pine showed no differences between shaded and unshaded conditions. Nitrogen availability and litter type had no significant effect on germination of either species. Both species showed increased RGR, but also higher mortality rates, when grown in an enriched nutrient environment. While Aleppo pine showed no differences in RGR and mortality rate under different shading levels, RGR decreased and mortality increased for holm oak in full light. Increased radiation decreased LAR, SLA and height:diameter ratio, and increased RWR and R/S in both species, although Aleppo pine showed more pronounced changes. Unlike Aleppo pine, holm oak responded to increased nutrient availability by decreasing R/S and increasing LAR. From these results, no seed-seedling conflicts were found in either species, but a trade-off does seem to exist for holm oak between biomass allocation traits deployed in response to increased nutrient availability and radiation. Aleppo pine outperformed holm oak under most environmental conditions tested and showed a wider regeneration niche.
Barrantes O, Moliner E, Plaza M, Gracia C (1998) Effects of ozone and sulphur dioxide fumigations on Aleppo pine (Pinus halepensis Mill.) seedlings in open-top chambers. The Earth's Changing Land GCTE-LUCC Open Science Conference on Global Change Abstracts. Institut Cartogràfic de Catalunya, Barcelona, pp. 58-59.
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