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Chap. 55 Ecosystems

Campbell Biology Chapter 55: Ecosystems and Restoration Ecology

QuestionAnswer
Law of Conservation of Energy Energy cannot be created or destroyed.
Ecosystem Consists of the community plus the abiotic factors. Characterized by energy flow and chemical cycling.
Eutrophication Occurs in lakes polluted by excess amounts of nutrients.
Actual evapotranspiration Increases with the amount of precipitation in a region and amount of solar energy available.
Primary producers This trophic level consists of autotrophs
Primary consumers This trophic level consists of herbivores
Secondary consumers Carnivores that eat herbivores.
Detritivores Consumers that get their energy from nonliving organic material such as remains of dead organisms, feces, fallen leaves, and wood.
Green World Hypothesis Herbivores consume relatively little plant biomass because they are held in check by limiting resources, predators, parasites and other forces.
Gross primary production The amount of light energy that is converted to chemical energy by photosynthesis.
Net primary production Equal to gross primary production minus energy for respiration.
Biological magnification Toxins become more concentrated in successive trophic levels of the food web
Organic material Decomposes faster in tropical rain forests than in temperate forests.
Energy Cannot be recycled, so an ecosystem must have a continuous influx of energy.
Decomposition The process of decay caused by bacterial or fungal action. Separation of a substance into two or more substances that may differ from each other and from the original substance. The rate of decomposition is controlled by temperature, moisture, and nutrie
Energy flow The transfer or flow of energy through a biological food chain.
Created by: 1756311159
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