302 notes 2

302 notes 2 - 4 (C) Disruptive Selection (C) Disruptive...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
1 ECOL 302 Dr. Mitchell Pavao-Zuckerman • Office hours: M & W 2-3; or by appointment • Biosciences West Rm 414 • Email: mzucker@email.arizona.edu Course site: d2l.arizona.edu Evolution and Ecology Goals • Understand links and relationships between ecology and evolution • Refresh major concepts of evolutionary theory for ecological understanding What is Evolution?
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 Microevolution Mechanisms: • Mutation • Genetic drift • Gene flow • Natural Selection Natural Selection generation 1 generation 2 (1) Replication (2) Excessive units (3) Survival dependent on a trait (4) Trait can be transmitted Evolution Acts to Maximize Fitness • Not absolute • More than reproduction • Not short term • More than individual traits Genetic Frequencies Traits Natural Selection
Background image of page 2
3 (A) Directional Selection (A) Directional Selection e.g. Peppered Moth (B) Stabilizing Selection (B) Stabilizing Selection e.g. human birth weight
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 4
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 6
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 4 (C) Disruptive Selection (C) Disruptive Selection e.g. Grasses on toxic mine soils High mortality: Less resistant plants + contaminated soil More resistant plants + uncontaminated soil Selection Produces Organisms that Are Adapted to Their Environment Niche vs. Habitat G.E. Hutchinson 1965: The Ecological Theater and the Evolutionary Play Ecological Interactions Evolution 5 Ecological interactions can cause evolutionary change Coevolution Resistance to defenses More defenses Cultural Coevolution Genes Behavior Culture Evolution can alter ecological interactions New environment Units of Selection Darwinian selection: individuals (1) Replication (2) Excessive units (3) Survival dependent on a trait/attribute (4) Trait can be transmitted 6 Units of Selection Kin selection Group selection?...
View Full Document

Page1 / 6

302 notes 2 - 4 (C) Disruptive Selection (C) Disruptive...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online