Question: The ability of ecologists to identify regions of greatest species
The ability of ecologists to identify regions of greatest species richness could have an impact on the preservation of genetic diversity, a major objective of the World Conservation Strategy. The article “Prediction of Rarities from Habitat Variables: Coastal Plain Plants on Nova Scotian Lakeshores” (Ecology : 1852– 1859) used a sample of n = 37 lakes to obtain the estimated regression equation
where y = species richness, x1 = watershed area, x2 _ shore width, x3 = drainage (%), x4 = water color (total color units), x5 = sand (%), and x6 = alkalinity. The coefficient of multiple determination was reported as R2 = .83. Use a test with significance level .01 to decide whether the chosen model is useful.
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