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34 Cards in this Set
- Front
- Back
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Ecology
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the scientific study of how organisms interact with their environments.
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Abiotic
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Nonliving chemical and physical factors
Temperature Light Water Minerals Air |
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Biotic components
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Living factors
All the other organisms that are part of an individual’s environment E.g. competitors, predators, prey, etc. |
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Organismal ecology
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– the study of the evolutionary adaptations that enable individual organisms to meet the challenges posed by their abiotic environments.
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Population ecology
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the study of how members of a population interact with their environment
Focus: factors influencing population density and growth |
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Community ecology
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the study of how interactions between species affect community structure and organization.
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Ecosystem ecology
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– the study of energy flow and the cycling of chemicals among the various biotic and abiotic factors in an ecosystem
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Biosphere
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the global ecosystem; envelope of life
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DDT
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powerful insecticide
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Population
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a group of individuals of the same species in a given area at a given time.
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Dispersion pattern
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the way individuals are spaced within a population’s geographic range
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growth rate
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rate of change in population size
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density
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number of individuals per unit area or volume)
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Population Growth
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# of births – # of deaths
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growth rate
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change in population size per time interval
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carrying capacity
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the number of individuals that the environment can sustain
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desnsity -dependent facotrs
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population-limiting factors whose effects intensify as the population increases in density.
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Intraspecific comptetion
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– competition between the same species for the same limited resources
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denstiy independent factor
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population-limiting factors whose intensity is unrelated to population density.
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Biodevirsity
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all of the variety of life
concerned with: |
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species Richness
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total number of different species in a community
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speices diversity
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the number and relative abundance of species in a biological community.
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Biodiversity Crisis
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the current rapid decline in the variety of life on earth, largely due to the effects of human culture.
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monoculture
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cultivation of single plant variety in a large area
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ecological footprint
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a measure of human demand on the Earth's ecosystems.
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per capita
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ecological footprint is a means of comparing consumption and lifestyles, and checking this against nature's ability to provide for this consumption.
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eutrophication
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ecological footprint is a means of comparing consumption and lifestyles, and checking this against nature's ability to provide for this consumption.
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hypoxia
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low oxygen levels
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anoxia
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no oxygen
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global warming
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A slow but steady rise in Earth’s surface temperature
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greenhouse effect
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the warming of the atmosphere caused by greenhouse gasses (including carbon-dioxide) that absorb infrared radiation and slow its escape from earth’s surface
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risk management
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is the identification, assessment, and prioritization of risks followed by coordinated and economical application of resources to minimize, monitor, and control the probability and/or impact of resoucres events.
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Alternative enegry
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Fuel source not derived from fossil fuels
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renewable enegry
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Energy resources that are naturally replenishing but flow-limited.
inexhaustible in duration limited in the amount of energy that is available per unit of time. |
