Four lighting models are characterized and typified in plant communities form the regenerative series of the thermic oak grove in Valencia, Spain (Rubio longifoliae - Quercetum rotundifoliae Costa, Peris & Figuerola 1982). The relative levels of photosynthetically active radiation are studied under several plant canopies: coniferous trees (Pinus halepensis Miller), lauroid shrubs (Arbutus unedo L. and Viburum tinus L.), evergreen trees (Quercus rotundifolia Lam.) and a compound of great shrubs (Pistacia lentiscus L.) and decidious trees (Fraxinus ornus L.), starting from four different height data (0,00, 0,25, 0,50 and 1,00m). The relationships between these relative levels and the phenology of the dominant species, are also studied.... [Leer más...]