Lecture 16 - Lecture 16: Dealing with Limitations...

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Lecture 16: Dealing with Limitations Relationship between limitation and the strategies that organisms can use I. Key Words A. Environmental Resistance - B. Determination - C. Regulation - D. Extrinsically - E. Intrinsically - F. Feedback - G. Time Lag - H. Stochastic Events - I. Diffuse Interactions - J. Higher-Order Interactions - II. Key Concepts A. Population growth can be limited by ___________________________________. B. The strength of population determination is ______________________________, but the strength of population regulation is ______________________________. C. Population determination is __________________________________________ (on or off, _______________________________________________________), and population regulation ____________________________________________ (regulation is ________________________________when population size is low, but ______________________________________ when population size is high). D. ______________________________ and _______________________________ are possible mechanisms of regulation. E. When organisms develop strategies to increase their fitness, they have to pay attention to _______________________________________________________. III. General Outline A. Useful Concepts 1. R 0 and r a. Population growth rate can be measured with_R0_____ and ___r____ b. These metrics are related by: r~~log e R 0 /G c. Therefore, we can use metric r for population growth, no matter what the life history 2. r and r max a. Population growth rate can be slowed by the effects of the abiotic environment, a species-population on itself, and other species-population . b. The potential growth rate, in the absence of these effects, is called _____ rmax __ c. r max - r is called __ environmental resistence _ d. We want to figure out exactly how environmental resistance restricts population growth B. Two Basic Ways to Limit Population Growth 1. Determination and Regulation a. The difference between determination and regulation relates to the idea of density dependence that we developed earlier
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b. The strength of population determination is not related to
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This note was uploaded on 04/19/2008 for the course PCB 3043 taught by Professor Mccoy during the Fall '07 term at University of South Florida - Tampa.

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Lecture 16 - Lecture 16: Dealing with Limitations...

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