Lab4. Population ecology

Lab4. Population ecology - Biol 1209 Lab 4 Population...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
2/13/12 1 + Biol 1209 Lab 4. Population Ecology + Today ` s lab n Quiz n Turn in writing assignment 1 with quiz n Introduction to Population Ecology n Chlamydomonas experiments
Background image of page 1

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

View Full DocumentRight Arrow Icon
2/13/12 2 + Population ecology n The study of the dynamics of a single species and how they interact with the environment. n Population – a collection of organisms of the same species occupying a defined geographic area Trumpeter Swan Populations + Population size n Population size is a dynamic process - always changing over time n Population growth rate : rate at which the number of individuals in a population increase over time (Popula)on at end of period – Popula)on at beginning of period± Popula)on at beginning of period Rate r =
Background image of page 2
2/13/12 3 + Factors affecting population size birth immigration death emmigration Population size environment resources Limiting factors : Any essential resource that is in short supply All limiting factors acting on a population dictate sustainable population size + Population growth models Exponential growth Logistic growth Difer in assump)ons made Similar in ini)al rate oF increase Continuous reproduction (e.g., no seasonality) All organisms are identical (e.g., no age structure- all are able to reproduce at a given time) Environment is constant in space and time (e.g., resources are unlimited) Seasonality in reproduction Individuals need to reach maturity to reproduce Not random mating Reproduction is affected by changes in environmental conditions, distribution of resources
Background image of page 3

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

View Full DocumentRight Arrow Icon
2/13/12 4 Birth exceeds death Time (generations) Population size Birth and death rate independent of population size Ignores migration Assumes unlimited resources
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 11

Lab4. Population ecology - Biol 1209 Lab 4 Population...

This preview shows document pages 1 - 5. Sign up to view the full document.

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