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Ecosystem
All the living band non living things I that interact in a particular area
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3 things all organisms need from their habitat to live, grow and reproduce
Water, food, shelter
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Organism
Living things in an ecosystem
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Population
All members of the same species in a particular area
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Community
All the interacting populations that live together in an area
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Biotic factor
Living parts of an ecosystem
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Abiotic factors
Non living parts of an ecosystem
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Photosynthesis
When plants use the light from the sun, store it and use it for energy
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Species
Group of organisms that are all physically the breed and breed with each other
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Ecology
Study of how living things interact with their environment
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Direct observation
Counting one by one
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Limiting factor
- environmental factor that causes a population to decrease
- lack of food
- lack of water
- bad weather
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Indirect observation
Counting all the nesting sites in an area
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Sampling
Used if population is large and hard to ffind it is an estimate
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Mark and recapture
- Capture, mark and release first group
- Capture another group
- the % marked indicates the population size
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Immigration
Coming INTO an area
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Emigration
Leaving a population
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Limiting factor
- Environmental factor that causes population to decrease
- lack of water
- lack of food
- bad weather
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Carrying capacity
The largest population that an environment can support
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Adaptations
- Behaviors and physical characteristics of species that allow them to live successfully in their environment
- fur on polar bear
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Natural selection
Changes that make organisms better suited for their environment
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Symbiosis
- Close relationships between 2 species that benefits at least 1 of them
- plankton and whale
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Predation
One organism kills and eats another
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Niche
Where an organism fits area an area
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