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Intro to Ecology
Transcript of Intro to Ecology
Biodiversity: is the variety, of living things in an ecosystem.
Changing one factor in an ecosystem can affect many other factors.
Every ecosystem includes living and nonliving factors.
Ecology: is the study of the relationships among organisms and their environment.
Keystone species: a species that has an unusually large effect on its ecosystem.
Organism: an individual living thing.
Ecologists: study environments at different levels of organization.
Abiotic factors: are nonliving things.
Biotic factors: are living things.
An ecosystem includes both biotic and abiotic factors.
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.
nesting sites for birds
Keystone species form and maintain a complex web of life.
Population: a group of the same species that lives in one area.
Field experiments may not help determine actual cause and effect.
Field experiments give a more accurate picture of natural interactions.
Lab experiments are not reflective of the complex interactions in nature.
Lab experiments give researchers more control.
Experiments are performed in the lab or in the field.
Indirect surveys are used for species that are difficult to track and include looking for other signs of their presence.
Direct surveys for easy to spot species employ binoculars or scopes.
Observation is the act of carefully watching something over time.
Observations of populations can be done by visual surveys.
Ecological research methods include observation, experimentation, and modeling.
Community: a group of different species that live together in one area.
Ecosystem: Includes all the organisms AND climate, soil, water, rocks and other nonliving things in an area.
Biome: a major regional or global community of organisms.
* Characterized by the climate and plant life.
Name 3 biotic factors
Name one abiotic Factor
Why is biodiversity important?
have more biodiversity than other locations
Cover less than 7% of the earths ground
Accounts for more than 50% of the earths plant and animal species
*because its cool and PRETTY!
Under threat by humans
Explain why this is a population.
Explain why this is a community
name an ecosystem!
Point to the Mediterranean biome
Where is the tropical rain forest?
What other biomes do you see?
*Keystone species form and maintain a complex web of life