Esa Unit3

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

Biogeography ,[object Object],[object Object]

Range Expansion ,[object Object]

Species Transplants ,[object Object],FRANKLIN, N.J. — The black carcasses of dead starlings still pepper the snowy roads and lawns of central New Jersey’s rural Griggstown community three days after federal officials used a pesticide to kill as many as 5,000 of the birds.Many residents Monday were still getting over their shock from the sudden spate of deaths. Some were unaware that the deaths resulted from an intentional culling and that the pesticide used was harmless to people and pets.“It was raining birds,” said Franklin Township Mayor Brian Levine. “It got people a little anxious.”The U.S. Department of Agriculture called local police last week and the Somerset County Health Department to warn them that a culling program was under way, but there was no notice that dead birds could fall from the sky, Levine said.“A lot of us are concerned because it’s so odd,” said Chris Jiamboi, 49, as his vehicle idled along a stretch of road in Griggstown marked with the flattened remains of dead starlings. “There were a lot of them dead in the roads and no one drives fast enough around here to kill a bird. Then they started showing up dead in people’s backyards.”

Population Change Factors: Births Deaths Migration Flux

Reproductive Rates ,[object Object],[object Object],[object Object],[object Object],[object Object]

Mating Schemes ,[object Object],[object Object],[object Object]

Growth Strategies R-select K-select Short life Long life Rapid Growth Many small offspring Little parental investment Population fluctuation Usually prey Environmentally adaptable Slower growth Fewer, larger offspring Higher parental care Population size stable Predator or highly competitive Adapted to stable environment

Malthus 1797: Essay on Population As population rises . . . . . Labor Glut ----> Unemployment Prices Rise ------> Hunger, Food Shortages Voluntary Limit on Families

Drop in Death Rate Due to : Vaccines Antibiotics Better diet Lifestyle choices Safety considerations

Population Dynamics ,[object Object],[object Object],[object Object],[object Object],[object Object]

World Population ,[object Object],[object Object]

Doubling Time ,[object Object],[object Object],[object Object],[object Object]

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

Esa Unit3

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Esa Unit3