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Demographic Viability Of Populations Of Silene Regis In Midwestern Prairies: Relationships With Fire Management, Genetic Variation, Geographic Location, Population Size And Isolation, Eric S. Menges, Rebecca W. Dolan
Demographic Viability Of Populations Of Silene Regis In Midwestern Prairies: Relationships With Fire Management, Genetic Variation, Geographic Location, Population Size And Isolation, Eric S. Menges, Rebecca W. Dolan
Rebecca W. Dolan
We studied the demographic viability of populations of a long-lived iteroparous prairie perennial, Silene regia, in relation to management regimes, population sizes, geographical region (Ohio and Indiana vs. Missouri and Arkansas), degree of isolation and amount of genetic variation. Demographic data were collected from 16 populations for up to 7 years. This species has high survivorship, slow growth, frequent flowering and episodic seedling recruitment. Matrix projection methods were used to summarize population performance with and without recruitment. Median finite rates of increase by population varied from 0.57 to 1.82 and from 0.44 to 0.99, respectively. Populations with the highest rates …