What is population ecology Population Ecology the study

Population Ecology • the study of how plant and animal populations within a community

Population Density • the measure of how crowded organisms are in their environment How

Age • a population can be classified by its age • 3 groups of

Distribution • a description of how organisms are distributed within their community How does

Population Growth • increase in the number of organisms who inhabit an area •

Increasing, Decreasing, or Stays the Same… # of immigrants > # of emigrants #

Competition • the use of the same resources by different organisms to live •

Predation • one living organism serving as food for another organism How does predation

Carrying Capacity • the maximum population size of the species that the environment can

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What is population ecology?

Population Ecology • the study of how plant and animal populations within a community affect each other • What affect population ecology? • density • age • distribution • growth • competition • predation

Population Density • the measure of how crowded organisms are in their environment How does population density • organisms compete for resources, keeping a affect ecology? balance ispopulation important If the population is too high, some organisms will _____. die

Age • a population can be classified by its age • 3 groups of age classes are 1. preproductive – young and have not reproduced 2. reproductive – in the process of reproducing 3. postproductive – past the stage of reproducing How does age affect population ecology? To be productive, a community should contain each of these three age groups.

Distribution • a description of how organisms are distributed within their community How does distribution affect population ecology?

Population Growth • increase in the number of organisms who inhabit an area • population growth is determined by immigration – the act of angrowth organism How 1. does population moving into a habitat affect population ecology? 2. emigration – the act of an organism moving out of a habitat 3. natality – the production of new individuals in a habitat (birth rate) 4. mortality – the death rate in a population

Increasing, Decreasing, or Stays the Same… # of immigrants > # of emigrants # of immigrants = # of mortalities # of natalities < # of mortalities # of immigrants + # of emigrants = # of natalities + # of mortalities

Competition • the use of the same resources by different organisms to live • What are the 3 major limiting resources for animals? Howfood, does competition shelter, and water affect population • What are the 3 major limitingecology? resources for plants? nutrients, sunlight, and water

Predation • one living organism serving as food for another organism How does predation affect population ecology?

Carrying Capacity • the maximum population size of the species that the environment can sustain indefinitely, given the food, habitat, water and other necessities available in the environment

Predator-Prey Graph