Floristic fluctuations in annual pastures: the role of competition at the regeneration stage

摘要: . Many studies have shown the existence of large between-year fluctuations in floristic composition annual Mediterranean pastures, and these been linked to autumn rainfall patterns. It has postulated that differing interannual weather patterns may play a decisive role competitive processes, especially during period germination seedling establishment. Removal experiments conjunction with manipulation phytotron were conducted test whether competition affects mortality under different patterns, pastures at three successional stages after last being ploughed. Early late rains affect as certain species germinate better conditions than others each stage. In general, however, is not manifested through inhibition new once space occupied, density-dependent found only for few species.