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Definition
| an enviroment that provides the things an organism needs to live, grow , and reproduce |
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Definition
| the living parts of a habitat |
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| the nonliving things in a habitat |
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| All the members of one species in a perticular area |
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| A group of organisms that are physically similar and can mate with each other and reproduce |
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Definition
| Count the number of organisms in a small area |
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| an approximation of a number based on reasonable assumptions |
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Definition
| counting EVERY MEMBER of a species in a perticular area |
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| observe the signs of a perticular species |
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Definition
| all the different populations that live together in an area |
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| the community of organisms that live in a perticular area, along with their nonliving surroundings |
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| the study of how living things INTERACT WITH EACH OTHER and their enviroments |
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| a person who studys ecology |
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Definition
| the largest population an area can support |
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Definition
| the role of an organism in its habitat OR how it makes it living |
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| the nuber of individuals in an area of specific size |
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| factor that causes a population to decrease |
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Definition
| a behavior or physical characteristics that allow an organism to survive in their enviroment |
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Definition
| stuggle to survive in a habitat with limiting resources |
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Definition
| one organism kills and eats another |
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Definition
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| the one that does the killing |
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Definition
| close relationship 2 species where at least one benifits |
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| one benefits another is neither helped nor harmed |
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Definition
| one organism lives on or in another and harming it |
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Definition
| smaller than host - benefits from relationship |
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Definition
| parasite lives on or in this organism |
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Definition
| the series of changes that occur in an area where there was NO ecosystem |
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Definition
| first species to populate an area |
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Definition
| the series of changes that occur in an area where there WAS an ecosystem |
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Term
| What is the equation used to caculate population density? |
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Definition
| # of individuals divided by the unit area |
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| An ecologist counts 75 cardinals in an area measuring 15 square kilometers. What is the population density of the cardinals? |
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Definition
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| List the levels of organization from smallest to largest. |
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Definition
1.Organisms
2.Population
3.Community
4.Ecosystem |
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| What are the 4 limiting factors for populations? |
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Definition
| food, weather, space, and water |
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| What abiotic factors are needed for plants to make their own food in photosynthesis? |
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Definition
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| All abiotic and biotic factors in an area together make up a(n) _________ |
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