<正>DEAR EDITOR:The species-area relationship(SAR)describes the phenomenon whereby the number of plant and animal species found in an area of wild habitat is strongly correlated with the size of that area.As one of the few ecological laws,the SAR plays a vital role in the design and assessment of biodiversity protection regions(Lomolino et al,2010;Ladle&Whittaker,2011).Increasing area and habitat promote species richness(Triantis et al,2003)and both these mechanisms have
DEAR EDITOR:The species-area relationship(SAR)describes the phenomenon whereby the number of plant and animal species found in an area of wild habitat is strongly correlated with the size of that area.As one of the few ecological laws,the SAR plays a vital role in the design and assessment of biodiversity protection regions(Lomolino et al,2010;Ladle&Whittaker,2011).Increasing area and habitat promote species richness(Triantis et al,2003)and both these mechanisms have