Chapter 12

Chapter 12 - Chapter 12 Temporal and Spatial Dynamics of...

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Chapter 12- Temporal and Spatial Dynamics of Populations Fluctuation in natural populations o Variation in density depends on: Magnitude of fluctuation in the enviro Diatoms in the seas with changing seasons Intrinsic stability of the population Sheep on Tasmania constant for a century Sheep have a greater capacity for homeostasis and can better resist physiological effects of enviro change b/c they’re bigger Longer life span also, evens out birth and death rates o Turnover- high mortality rates and high birth rates in a population, depends on continued reproduction sensitive to food, predation, enviro. . o Periodic cycles- intervals between successive highs and lows in often regular patterns Temporal Variation affects age structure o Sizes of age classes provide history of population changes in past o History of a forest- pines vs hardwoods Response of populations to their own densities o Once at carrying capacity, populations will oscillate back and forth across
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This note was uploaded on 03/22/2012 for the course PB 360 taught by Professor Wentworth during the Fall '08 term at N.C. State.

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Chapter 12 - Chapter 12 Temporal and Spatial Dynamics of...

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