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Populations and Ecosystems

Populations and Ecosystems. Science for Teachers. Ecology. Study of the relationships between organisms ( biotic ) and their nonliving ( abiotic ) environment. Biotic Factors. Abiotic Factors. Nonliving part of the environment Soil Water rocks Climate Temperature Air Sunlight.

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Populations and Ecosystems

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  1. Populations and Ecosystems Science for Teachers

  2. Ecology • Study of the relationships between organisms (biotic) and their nonliving (abiotic) environment

  3. Biotic Factors Abiotic Factors Nonliving part of the environment Soil Water rocks Climate Temperature Air Sunlight • Living part of the environment • Plants • Animals • Fungi • Bacteria • Protists

  4. Habitat • Where an organism lives • Organism’s home • Describe various habitats • Adaptations

  5. Niche • Organism‘s way of life • How the organism fits into its environment

  6. Levels of Organization • Organism—single complete living thing

  7. Levels of Organization • Population—group of individuals of the same species that live in the same area

  8. Levels of Organization • Community—all the populations of different species that live in an area

  9. Levels of Organization • Ecosystem—all of the organisms that live in a particular place along with the nonliving, physical environment

  10. Levels of Organization • Biosphere—all the living an nonliving things on Earth

  11. Producers • Autotrophs • Organisms that use energy from sunlight or chemicals to produce their own food • Includes plants, algae, and some bacteria

  12. Consumers • Heterotrophs • Organisms that cannot make their own food • includes animals, fungi, and bacteria

  13. Types of Consumers • Herbivores—eat only plants • Cows, caterpillars, deer • Carnivores—eat only animals • Wolves, owls, lions • Onmivores—eat both plants and animals • Humans, bears, crows

  14. Decomposers • Breaks down dead organisms for food • Recycles nutrients • Includes fungi and bacteria

  15. Food chain • Shows who eats whom in an ecosystem • Steps that show the transfer of energy

  16. Food Web • Several connected food chains • Aquatic • Terrestrial

  17. Food Web Stress • Overgrazing • Overpopulation • Natural Disaster • Non-native species • Human impact • Positive • Negative

  18. Competition • Organisms of the same or different species attempt to use the same resources

  19. Carrying Capacity • Largest number of individuals of a population that a given environment can support

  20. Limiting Factors • Causes the growth of a population to decrease • Factor that restricts the number of individuals in a population • Food • Space • Water • Shelter

  21. Relationships • Predator-prey • Parasitism • Mutualism • Commensalism • Interdependence

  22. Survival • Living • Extinct • Endangered • http://www.agfc.com/wildlife-conservation/endangered.aspx#list

  23. Nitrogen cycle

  24. Carbon cycle

  25. Carbon dioxide-oxygen cycle

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