Cornell Notes Template



Name: __________________________ Topic: ________4.2____________

|Essential Question: |

|Questions/Main Ideas: |Notes: |

|1. |A niche is the range of physical and biological conditions in which a species lives and the way the species |

| |obtains what it needs to survive and reproduce |

| |Aka it’s role in the ecosystem |

| |Niche-Involves: |

| |Resources available-any necessity of life |

| |En 2: Give an example of a resource: |

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| |Physical factors-how it interacts with abiotic factors |

| |En 3: Give an example of an abiotic factor an organism interacts with: |

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| |biological aspects-how it interacts with biotic factors |

| |En 4: Give an example of a biotic factor an organism interacts with: |

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| |tolerance-the ability to survive and reproduce under a range of environmental circumstances |

| |When an environmental condition extends beyond an organisms optimum range, it experiences stress |

| |This means more energy is used for homeostasis, and less for growth/reproduction |

| |The species’ tolerance determines where its habitat is |

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|Questions/Main Ideas: |Notes: |

|2. |2. By causing species to divide resources, competition helps determine the number and kind of species in a |

| |community and the niche each species occupies |

| |a. intraspecific competition-competition among members of the same species |

| |b. interspecific competition-competition among members of different species |

| |Non native species can become invasive species if introduced into a new environment |

| |May have no natural predators |

| |grow out of control |

| |Monopolize resources |

| |Competitive exclusion principle-no two species can occupy exactly the same niche in exactly the same habitat |

| |at exactly the same time |

| |The species that is better at competing for resources will survive |

| |Organisms may divide resources instead of competing for them, each forming their own niche |

| |En 5: How did the North American warblers divide their resource? |

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|3. | |

| |3a. Predators |

| |affect the size of prey populations |

| |determine where the prey can live and feed |

| |3b. Herbivores |

| |affect the size and distribution of plant populations |

| |determine the places certain plants can survive and grow |

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| |-Keystone species-species whose population dramatically affects the structure of a community |

| |En 6: Explain how otters are a keystone species |

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| |4. There are 3 main classes of symbiotic (where organisms live together) relationships: |

| |a. Mutualism: relationship where both species benefit |

| |b. Parasitism: relationship where one organism lives inside or on another and harms it |

| |c. Commensalism: relationship where one organism benefits, and the other is neither helped nor harmed |

| |En 7: give an example for each of the 3 symbiotic relationships: |

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| |Type of relationship: |

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| |Species 1 |

| |Species 2: |

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| |Mutualism |

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| |Parasitism: |

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| |Commensalism: |

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|Summary |

|In your own words and in complete sentences, write a 3 – 4 sentence summary paragraph. Your summary should cover the main concepts of the notes, be accurate, and |

|have adequate details. |

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