POPULATION GENETIC CONSEQUENCES OF SMALL POPULATION-SIZE - IMPLICATIONS FOR PLANT CONSERVATION

Although the potential genetic risks associated with rare or endangere d plants and small populations have been discussed previously, the pra ctical role of population genetics in plant conservation remains uncle ar. Using theory and the available data, we examine the effects of gen etic drift, inbreeding, and gene flow on genetic diversity and fitness in rare plants and small populations. We identify those circumstances that are likely to put these plant species and populations at genetic risk. Warning signs that populations may be vulnerable include change s in factors such as population size, degree of isolation, and fitness . When possible, we suggest potential management strategies.