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Lecture Slides on Ecology of Populations - General Biology III | BI 103, Study notes of Biology

Central Oregon Community CollegeBiology

Material Type: Notes; Class: General Biology III; Subject: Biology; University: Central Oregon Community College; Term: Unknown 1989;

Typology: Study notes

Pre 2010

Uploaded on 08/19/2009

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koofers-user-q3n 🇺🇸

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Population Dynamics
Ecology of Populations
populations growth
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Download Lecture Slides on Ecology of Populations - General Biology III | BI 103 and more Study notes Biology in PDF only on Docsity!

Ecology of Populations

populations growth

Exponential Growth

Carrying Capacity

Carrying Capacity

Some populations fluctuate

  • Some populations shoot past their carrying capacity--boom phase--then crash well below it--bust phase.

Range and Density of Western

Tanager

Habitat: Douglas fir, pine, spruce and aspen forests.

Summer range

Range and Density of Sage

Grouse

Habitat: sage brush and native steppe

Uniform Dispersion

Random Dispersion

Age Structure & Population

Trends

Age at First Reproduction

  • When females begin breeding can strongly affect population numbers over time (but not shape of curve)

Age and Reproductive Success

Age in years Leach’s storm-petrel

Age at Death (Senescence)

  • Probability of dying over time influences all of the above life history traits
  • Survival curves used to make predictions about other life history traits.