Abstract
Recently, many authors have focused on the role of population genetics in the management and conservation of threatened species (see Soulé & Wilcox, 1980; Frankel & Soulé, 1981; Schonewald-Cox et al., 1983; Soulé, 1985, 1987 for reviews). There is one concept in the current theoretical framework of conservation biology that includes genetical aspects—Minimum Viable Population size (hereafter MVP). Conservation biologists have for a long time known that the smaller the population, the more susceptible it is to extinction by various causes. The MVP concept constitutes one of the major foci of current conservation biology (Simberloff, 1988) because the increasing fragmentation of the landscape caused by man will in the future reduce population size. Many of the factors that affect population dynamics, and thus, potentially, the likelihood of extinction, contain elements of uncertainty. Shaffer (1981) summarized the sources of uncertainty into four classes: demographic and environmental stochasticity, natural catastrophes and genetic stocliasticity. Different sources of uncertainty interact in extremely complex ways (Shaffer, 1987). We will in this chapter review the current knowledge of the conservation biology of plants with the focus on genetic stochasticity, i.e. genetics of small populations, and gene flow among populations.
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Widen, B., Svensson, L. (1992). Conservation of Genetic Variation in Plants—The Importance of Population Size and Gene Flow. In: Hansson, L. (eds) Ecological Principles of Nature Conservation. Conservation Ecology Series: Principles, Practices and Management. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-3524-9_4
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