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Published byLeona Gallagher Modified over 6 years ago
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Warm Up 10 4/7 ______ is the day to day condition. 2. ________ is the average, year after year condition. List the 3 main gases of the greenhouse effect that trap in heat to keep Earth warm. What are the 3 main climate zones? Which one are we in? Heat is transported in the biosphere by ______ & ______ currents.
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4.2 What Shapes an Ecosystem
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Biotic factor: biological influence on organisms within an ecosystem
Ex: predators, competition, bacteria, trees, plants
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Abiotic factor: nonliving factor that shapes an ecosystem
Ex: Soil type, rainfall, temperature, sunlight, winds, cave, nutrient availability
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Abiotic or Biotic factor?
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Habitat: area where an organism lives (includes abiotic & biotic factors)
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Niche: full range of physical & biological conditions in which an organisms lives & the way they use those conditions (occupation) Ex: 3 types of warblers have own niche in tree food, how it obtains, how it reproduces, where it needs to live
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Resource: any necessity of life
Ex: Water, nutrients, light, food, or space Competition: organisms of same or different species attempt to use same resource at same time
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Competitive exclusion principle: no 2 species can occupy the same niche in the same habitat at the same time
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Predation: one organism captures & feeds on another organism
Ex: snake eats frog
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Any necessity of life (water, shelter, mates)
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nonliving factor that shapes an ecosystem
Ex: Soil type, rainfall
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Where an organism lives
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biological influence on organisms within an ecosystem
Ex: predators, competition, bacteria,
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full range of physical & biological conditions in which an organisms lives & the way they use those conditions (occupation)
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one organism captures & feeds on another organism
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no 2 species can occupy the same niche in the same habitat at the same time
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organisms of same or different species attempt to use same resource at same time
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Symbiosis any relationship in which two species live closely together
“living together”
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Mutualism (+/+) both species benefit from the relationship
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Commensalism (+/0) one member of the association benefits and the other is neither helped nor harmed
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Parasitism (+/-) one organism lives on or inside another organism and harms it
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