244 resultados para Landscape ecology -- Catalonia -- Alta Garrotxa
Resumo:
On the basis of two parallel data sets refering to phenological events in open scrubs and pastures at two sites (Balaguer and Vic), the authors present a comprehensive report of the phenology of these Mediterranean communities. Four main phenophases (vegetative growth, flowering, fruiting and resting) were recorded monthly in 11 communities over 15 months. The results allow comparisons to be drawn between localities and communities, both at community and species levels, and to consider the effects of contemporary climatic data. This yielded useful information on general trends and on the particular responses of each community type to their corresponding constraints.
Resumo:
This work offers an approach to the vegetation of the Pyrenean area mentioned above according to three successive and related levels -vascularflora, plant communities and plant landscape. The study area stretches over 147.5 square km (projected surface), nearly 70% belonging to Cadí-Moixeró Natural Park. Altitudes rise from 720 m a.s.l. (Southern part) and 1100 m a.s.l. (Northern part) to 2536 m a.s.l. at the top ofla Tosa d'Alp. Limestone, the most common substrate, constitutes the highest mountain ranges in the area and also the roughest relief. Slate, carbonated slate, marl, sandstone and different kinds of conglomerate are also present. The bioclimate of lower parts is axeromeric sub-mediterranean type in the Gaussen scale, with a marked continental factor in the Northern sector (Cerdanya district). High parts have high mountain climates -cold axeric, subalpine and alpine types.
Resumo:
diverse and in most cases including lakes, snow beds and fens.