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Ecologists study environments at different levels of organization.

STANDARD SB.4.a – Investigate the relationships among organisms, populations, communities, ecosystems & biomes KEY CONCEPT Ecology is the study of the relationships among organisms and their environment. Ecologists study environments at different levels of organization.

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Ecologists study environments at different levels of organization.

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  1. STANDARD SB.4.a – Investigate the relationships among organisms, populations, communities, ecosystems & biomesKEY CONCEPT Ecology is the study of the relationships among organisms and their environment.

  2. Ecologists study environments at different levels of organization. • Ecology is the study of the interactions among living things, and between living things and their surroundings.

  3. Organism Organism • An organism is an individual living thing, such as an alligator.

  4. Population Population Organism Organism • A population is a group of the same species that lives in one area.

  5. Community Community Population Population Organism Organism • A community is a group of different species that live together in one area.

  6. Ecosystem Ecosystem Community Community Population Population Organism Organism • An ecosystem includes all of the organisms as well as the climate, soil, water, rocks and other nonliving things in a given area.

  7. Biome Ecosystem Ecosystem Community Community Population Population Organism Organism • A biome is a major regional or global community of organisms characterized by the climate conditions and plant communities that thrive there.

  8. Ecological research methods include observation, experimentation, and modeling. • Observation is the act of carefully watching something over time. • Observations of populations can be done by visual surveys. • Direct surveys for easy to spot species employ binoculars or scopes. • Indirect surveys are used for species that are difficult to track and include looking for other signs of their presence.

  9. Experiments are performed in the lab or in the field. • Lab experiments give researchers more control. • Field experiments give a more accurate picture of natural interactions.

  10. Ecologists use data transmitted by GPS receivers worn by elephants to develop computer models of the animal’s movements. • Modeling allows scientists to learn about organisms or ecosystems in ways that would not be possible in a natural or lab setting. • Computer and mathematical models can be used to describe and model nature.

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