Rapid changes in tree composition and biodiversity: consequences of dams on dry seasonal forests

摘要: Plants in a seasonal environment that become close to the artificial lake after dams construction may have enhanced growth or die due new conditions. Changes mortality rates lead changes community diversity, and we do not know if functions will change; our main hypothesis was few years impoundment, species richness diversity increase because increased supply of water would favor establishment water-associated species. Therefore, evaluated consequences proximity three dry forests table damming, with dynamic evaluation studied understand these areas. We sampled 60 plots 20×10 m each forest measured all trees diameter equal greater than 4.77 cm before damming 2 4 damming. calculated compared during periods. also using Shannon index rarefaction curves. Many had high many specialists died; conversely, others rates. Some typical riparian were found only enhancing deciduous forests. In general, communities seemed change forest, but specialist still recruitment rate, maintaining traits, such as dispersion by wind deciduousness forests, where an entire transformation did occur. conclude even increment basal area species, impacts consequent never same forest.