What This Document Is
This document provides detailed solutions to a laboratory assignment for Integrative Biology 200B (Ecology and Evolution) at the University of California, Berkeley. It focuses on practical applications of phylogenetic comparative methods, specifically addressing challenges encountered when analyzing correlated character evolution. The assignment centers around a practical investigation using real biological data and statistical analyses.
Why This Document Matters
This resource is invaluable for students enrolled in advanced ecology and evolution courses, particularly those dealing with phylogenetic analysis. It’s most helpful when reviewing your own work on the lab assignment, clarifying areas of confusion after attempting the problems independently, and solidifying your understanding of the statistical reasoning behind phylogenetic comparative analyses. It’s designed to help you learn from your mistakes and deepen your grasp of complex concepts.
Topics Covered
* Hypothesis testing in phylogenetic contexts
* Non-parametric correlation methods (Kendall’s and Spearman’s)
* Brownian Motion (BM) model assumptions and testing
* Phylogenetic Independent Contrasts (PICs) and their application
* Statistical correction for multiple testing (Bonferroni correction)
* Interpretation of statistical results in evolutionary biology
* Identifying and addressing violations of statistical assumptions
* Visualizing character correlations on phylogenies
What This Document Provides
* A comprehensive walkthrough of the assignment questions.
* Detailed explanations of the rationale behind chosen statistical tests.
* Discussion of potential issues encountered during data analysis.
* Insights into interpreting the output from statistical software.
* Guidance on identifying potential sources of spurious correlations.
* Clarification on the proper application of specific statistical corrections.
* Discussion of the impact of data transformations on analysis outcomes.
