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25 Cards in this Set
- Front
- Back
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What id ecology?
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the scientific study of interactions among organisms and between organisms and their environment
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What is the biosphere?
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the place on the planet where all life exists
-8k into sky and 11k below surface of ocean |
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What are the levels of organization?
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-species
-population -community -ecosystem -biome |
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What are a species?
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organisms that can be interbred
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What are populations?
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same species living in the same area
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What are communities?
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groups of different populations living in the same area
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What is an ecosystem?
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all living and non-living things in an area
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What is a biome?
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groups of ecosystems with the same climate and dominant population
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What is an ecological pyramid?
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a pyramid that shows the realtive amounts of energy and nutrients at each trophic level
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What are autotrophs/producers?
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organisms that can capture energy from sunlight or chemicals and use that energy to produce food
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What are heterotrphs/consumers?
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organisms that rely on other organisms for their energy and food supply
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What are the three levels of consumers?
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primary, secondary, tertiary
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What are decomposers?
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organisms that break down organic matter for their energy
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How much energy is passed on/lost from one trophic level to the next?
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10% moves on to each level, 9o% escapes to the earth as heat
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How much nutrients move in an ecosystem compared to energy?
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100% of the nutrients move on in an ecosystem compared to energy (recycled)
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How much toxic substances canbuildup in an ecosystem?
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the toxic substances are passed through an ecosystem and accumulate (100% passed)
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What is a habitat?
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the specific surroundings where an organisms lives
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What is a niche?
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the role that an organisms plays in the ecosystem
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What is competition (for resources)?
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when members of the same/different species compete for resources in the same environment
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What are two different results of competition?
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1. local extinction
2. survival |
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What is a fundamental niche?
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the full potential niche that an organisms would occup under ideal conditions
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What is a realized niche?
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the actual niche that an organism can occupy when it's competing with something else
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What is the Competitive Exclusion Principle?
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No 2 species can occupy exactly the same niche at the same time. One species will always out-compete the other species.
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Refering to the pond water lab, what does respiration do for the water?
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respiration takes away oxygen from the water
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Referring to the pond water lab, what does photosynthesis do for the water?
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photosynthesis adds oxygen to the water
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