1 / 13

Hypothesis Testing

Hypothesis Testing. Are two species identical? Are they more similar than you ’ d expect based on the distribution of environmental variables in their allopatric ranges?. Hypothesis testing. Actual Overlap. Distribution of overlaps under null hypothesis. OCCURRENCE RANDOMIZATION.

bina
Download Presentation

Hypothesis Testing

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Hypothesis Testing • Are two species identical? • Are they more similar than you’d expect based on the distribution of environmental variables in their allopatric ranges?

  2. Hypothesis testing Actual Overlap Distribution of overlaps under null hypothesis

  3. OCCURRENCE RANDOMIZATION Observed overlap Overlap for pseudoreplicate

  4. A. coelestinus A. chlorocyanus

  5. Incumbency • Steep environmental gradient • Ribbon of unsuitable habitat (tension zone)

  6. Regularization and # Parameters

  7. Model selection • ENMTools includes functions for calculating information criteria, so that models may be selected based on a combination of fit and complexity • AICc • BIC

  8. Simulated Data

  9. Simulated Data “Truth” + Inference

  10. Other tools • Useful measurements • ENM “breadth” • Range overlap • Variable correlation • Removal of duplicate occurrences • Jackknife, bootstrap, spatial cross-validation

More Related