Your SlideShare is downloading. ×
Unit 14a Relationships, biotic, and abiotic factors
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×

Introducing the official SlideShare app

Stunning, full-screen experience for iPhone and Android

Text the download link to your phone

Standard text messaging rates apply

Unit 14a Relationships, biotic, and abiotic factors

6,952
views

Published on


0 Comments
1 Like
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total Views
6,952
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
144
Comments
0
Likes
1
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. KEY CONCEPT Ecology is the study of the relationships among organisms and their environment.
  • 2. Ecologists study environments at different levels of organization. What are some of the different levels of organization called?
    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.
  • Community
    Community
    Population
    Population
    Organism
    Organism
    • A community is a group of different species that live together in one area.
  • 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.
  • 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.
  • Ecological research methods include observation, experimentation, and modeling.
    Observation is the act of carefully watching something over time. Give one example.
    Observations of populations can be done by visual surveys. What kinds of things would you observe?
    • Direct surveys for easy to spot species employ binoculars or scopes.
    • 5. Indirect surveys are used for species that are difficult to track and include looking for other signs of their presence. E.g. wolf howling
  • Experiments are performed in the lab or in the field.
    • Lab experiments give researchers more control.
    • 6. Lab experiments are not reflective of the complex interactions in nature. Why?
    • 7. Field experiments give a more accurate picture of natural interactions.
    • 8. Field experiments may not help determine actual cause and effect.
  • Ecologists use data transmitted by GPS receivers worn by elephants to develop computer models of the animal’s movements.
    Computer and mathematical models can be used to describe and model nature.
    • Modeling allows scientists to learn about organisms or ecosystems in ways that would not be possible in a natural or lab setting.
  • KEY CONCEPT Every ecosystem includes both living and nonliving factors.
  • 9. An ecosystem includes both biotic and abiotic factors.
    Biotic factors are living things. Give three examples.
    plants
    animals
    fungi
    bacteria
  • 10. Abiotic factors are nonliving things. Give three examples.
  • Changing one factor in an ecosystem can affect many other factors. How – give an example.
    Biodiversity is the assortment, or variety, of living things in an ecosystem.
    Rain forests have more biodiversity than other locations in the world, but are threatened by human activities.
  • 15. What is one drawback of a field experiment?
    A. It does not reflect complex interactions.
    B. It cannot be controlled.
    C. It is difficult to determine cause and effect.
    D. There are no manipulated variables.
  • 16. What is one drawback of a field experiment?
    A. It does not reflect complex interactions.
    B. It cannot be controlled.
    C. It is difficult to determine cause and effect.
    D. There are no manipulated variables.
    Correct Answer = C
    Which of the following is ordered correctly from largest to smallest?
    A. organism, population, community, ecosystem, biome
    B. ecosystem, biome, community, population, organism
    C. biome, ecosystem, community, population, organism
    D. biome, ecosystem, population, community, organism
  • 17. What is one drawback of a field experiment?
    A. It does not reflect complex interactions.
    B. It cannot be controlled.
    C. It is difficult to determine cause and effect.
    D. There are no manipulated variables.
    Correct Answer = C
    3. Which of the following is ordered correctly from largest to smallest?
    A. organism, population, community, ecosystem, biome
    B. ecosystem, biome, community, population, organism
    C. biome, ecosystem, community, population, organism
    D. biome, ecosystem, population, community, organism
    Correct Answer = C
  • 18. What is one drawback of a field experiment?
    A. It does not reflect complex interactions.
    B. It cannot be controlled.
    C. It is difficult to determine cause and effect.
    D. There are no manipulated variables.
    Correct Answer = C
    3. Which of the following is ordered correctly from largest to smallest?
    A. organism, population, community, ecosystem, biome
    B. ecosystem, biome, community, population, organism
    C. biome, ecosystem, community, population, organism
    D. biome, ecosystem, population, community, organism
    Correct Answer = C
  • 19. Review
    • Ecology is the study of how the living and non-living factors in an environment interact
    • 20. Levels of organization in ecology going from general to specific = biome, ecosystem, community, population, organism
    • 21. Observations include careful watching over time
    • 22. Lab experimentation and field experimentation have different benefits and downfalls
    • 23. Biotic factors are living things
    • 24. Abiotic factors are non-living things
    • 25. Biodiversity is important for survival of organisms in changing circumstances