Unit2 Ecology Ib Populations Ppt2003

[object Object],[object Object],[object Object],[object Object]

Population size ,[object Object],The passenger pigeon was once North America’s most numerous bird, but it is now extinct.

Population density ,[object Object],In the 19th century, the flocks of passenger pigeons showed high population density.

Population distribution ,[object Object],[object Object],[object Object],[object Object]

Population growth ,[object Object],[object Object],[object Object],[object Object]

Two Modes of Population Growth ,[object Object],[object Object],[object Object]

Exponential Growth ,[object Object],[object Object],[object Object]

Exponential growth in a growth curve ,[object Object],[object Object]

Biotic Potential ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],(Drum roll…)

ANSWER: ,[object Object],Do you need a cat?

Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Biotic Potential J curve Time Population Carrying Capacity ,[object Object],[object Object],[object Object],[object Object],Can Populations Grow Forever?

[object Object],[object Object],[object Object],[object Object],[object Object]

Malthusian Growth ,[object Object],[object Object],[object Object]

Population growth: Oscillations ,[object Object]

Population growth: Dampening oscillations ,[object Object]

r-Selected Species ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Examples of r-Selected Species ,[object Object]

Logistic Growth ,[object Object],[object Object],[object Object]

K-Selected Species ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Examples of K-Selected Species ,[object Object]

What Determines Population Size or Carrying Capacity? ,[object Object],[object Object],[object Object]

Environmental resistance Carrying capacity Stabilized population size Exponential growth Limiting factors: Water Space Food Predators Disease LE 4-11

Predator – prey cycles ,[object Object]

Density dependence ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Exponential Growth Example Caribou Population ,[object Object],[object Object],What we observed (actual data):

Exponential Growth Example ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

QUESTION: Review ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

QUESTION: Review ,[object Object],[object Object],[object Object],[object Object],[object Object]

Unit2 Ecology Ib Populations Ppt2003

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Unit2 Ecology Ib Populations Ppt2003