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The Organization of Life

The Organization of Life. Section #1: Ecosystems: Everything is Connected. What is an ECOSYSTEM?. all of the organisms living in an area together with their physical environment Examples: and oak forest a coral reef a median strip between the interstate a park.

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The Organization of Life

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  1. The Organization of Life Section #1: Ecosystems: Everything is Connected

  2. What is an ECOSYSTEM? • all of the organisms living in an area together with their physical environment • Examples: • and oak forest • a coral reef • a median strip between the interstate • a park

  3. Video Clip:Introduction to Ecosystems

  4. ECOSYSTEM • connected -- not isolated • no clear boundaries • if the components are affected, then the entire system can be affected

  5. Ecosystem Components • Biotic Factors = the living and once living parts • includes plants & animals (alive & dead), plus their waste products • Abiotic Factors = the nonliving parts • includes water, air, rocks & sand (soil), and energy (heat & light)

  6. Abiotic Factors Water Air Soil Light Heat

  7. Organisms vs. Species • organisms = an individual living thing • species = a group of organisms that are closely related and can mate to produce fertile offspring

  8. Populations • all the members of the same species that live in the same place at the same time • ex. - all the field mice in a VA corn field is one population but they will probably never interact with a field mice population in Iowa • note: individuals in a population will usually only mate with other individuals in the same population

  9. Communities • a group of various species that live in the same place and interact with each other • examples: • a pond community • a pine forest community

  10. From Organism to Ecosystem

  11. Habitats • the place an organism lives • a.k.a. “the address” • has specific characteristics that organism needs to survive • organisms are best suited to their natural habitat and will often die when forced to move or their habitat is destroyed

  12. Populations - Habitats - Niches

  13. Interactions Within Ecosystems

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