Many species live in a patchwork of local populations separated by inhospitable habitat. Local populations naturally go

Question:

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.

InterceptIntercept Connectivity Connectivity NULLNULL df Deviance Estimate -1.88-1.88 0.00580.0058 Residual

ConnectivityConnectivity 1 1 7.377.37 183183 210.49210.49 0.0070.007

Extinction probability 1.00 0.75 0.50 0.25 0.00 DOGOD 100 mem. 200 Connectivity 300

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?

Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Related Book For  book-img-for-question

The Analysis Of Biological Data

ISBN: 9781319226237

3rd Edition

Authors: Michael C. Whitlock, Dolph Schluter

Question Posted: