Many species live in a patchwork of local populations separated by inhospitable habitat. Local populations naturally go
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Many species live in a patchwork of local populations separated by inhospitable habitat. Local populations naturally go extinct (but can be later recolonized). Probability of extinction can be affected by the distance between locales. Jousimo et al. (2014) studied these effects with a large number of local populations of a fungus (Podosphaera plantaginis) that attacks plants (Platago lanceolata). They measured the “connectivity” of each local population (a measure of the distance to, and number of, nearby populations) and its fate during 2012. The data and regression curve are shown in the figure below. A value of 1 indicates a local population that went extinct in 2012, whereas a value of 0 indicates a local population that survived. Results of a statistical analysis of the data are shown in the tables.
a. Identify the type of analysis that was conducted here.
b. What assumptions did this analysis make?
c. Interpret the results. Does connectivity predict extinction probability? What is the direction of the relationship?
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The type of analysis that was conducted here is a logistic regression This is a type of regression a...View the full answer
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