Area effect on bird species richness of an archipelago of wetland fragments in Central Italy

摘要: Wetlands are naturally patchy habitat types that in fragmented landscapes usually immersed inside a sea of anthropogenic matrix. Decrease patch size area and increase isolation two important components wetland fragmentation. We investigated the effects fragment on bird species richness at four-level assemblages highly Mediterranean system Central Italy. Our results indicate influenced differently for distinct fragments. Area was significantly correlated to total richness, vagrant, breeding Phragmites -related (PBS). A comparison various regression equations showed log-log relationship best-fitted model amount variation ( R 2 line) much higher PBS breeders than vagrants. This pattern confirmed when including vagrants studies based equilibrium theory island bioge...