Effects of habitat fragmentation on genetic structure of plant populations and implications for the biodiversity conservation
生境片断化对植物种群遗传结构的影响及植物遗传多样性保护

Habitat fragmentation is the phenomenon that large,continuous habitat was destroyed into several spatially distant patchy habitats.Genetic effects of habitat fragmentation on plant populations include the sampling effect during habitat fragmentation and small population effect .Theoretical studies predict that genetic variation decreases and the genetic differentiation between remnant populations increases when habitats were fragmented.Empirical studies,however,are not always consistent with theoretical predictions.It suggests the role of many other factors,such as generation length,duration of fragmentation,size of fragmented population,change of gene flow,etc.We discussed the approaches of conserving genetic diversity of plant populations in fragmented habitats.