NATR 320 Lecture Notes - Lecture 27: Curve Fitting, Biodiversity Hotspot, Biogeography
6 Oct 2020
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Document Summary
Exchange of terrestrial fauna and flora between north & south america that resulted from emergence of the isthmus of panama about 3. 5 billion years ago. Endemic: limits a species to a specific geographical area. Native species faced w new predators, new competitors and new parasites. Increased dispersal rates and also increased extinction rates. Intentional and accidental: people move species. Introduced species often lead to extinction of native species and loss of biodiversity. Because many of the same species are introduced over and over again, many areas of. Many ecologists argue that introduced species are a major component of human-caused global change. More species near the equator, and fewer near the poles. Seems some fundamental process favors more species at lower latitudes. Linear regression analysis will find the line that best fits these data. Goodness of fit: measured by the coefficient of determination.
