Lecture 14 Outline_25Feb2011

Lecture 14 Outline_25Feb2011 - 1. 2. 3. 4. Example of the...

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ECOLOGY 326 Outline Lecture 14 (Chapter 10) February 25, 2011 Population Dynamics I. Dynamics = Population dynamics are generated by _____________________ What processes cause populations to increase and decrease? Life tables = Cohort = Three main ways to estimate patterns of survival: 1. 2. 3. Survivorship curves Type I Type II Type III Age distributions indicate whether or not populations are replacing themselves, stable or declining. Examples with trees Examples with birds II. Techniques to estimate population growth rate Birth rate = fecundity schedule = net reproductive rate (R o ) = geometric rate of increase ( λ ) =
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ECOLOGY 326 Outline Lecture 14 (Chapter 10) February 25, 2011 non-overlapping (discrete) generations = overlapping (continuous) generations = generation time ( T ) = per capita rate of increase ( r ) = R o versus r Dynamic R o r population increasing population stable population decreasing III. What are four characteristics of “invasive species”?
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Unformatted text preview: 1. 2. 3. 4. Example of the use of Biological Control to reduce the population of a pest species In 1859, European rabbits were introduced to Australia for sport by Thomas Austin. .. Australians have been cursing him ever since. Myxomatosis is caused by the myxoma virus. The disease was discovered in South America in 1896 where it had devastating effect on the European rabbit, imported early that century. The myxoma virus was endemic to the local wild rabbit population which was mostly resistant to the disease and acted as the natural reservoir. Myxomatosis virus (from South American jungle rabbits) was introduced to Australia in 1950 - 1951, killed ~ 99.8% of the infected rabbits in the first epidemic. The following season 90%, the third year 40-60%. Why did the lethality of myxomatosis decrease?...
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Lecture 14 Outline_25Feb2011 - 1. 2. 3. 4. Example of the...

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