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39 Cards in this Set
- Front
- Back
any basic, unique form of matter
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element
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pathways which move matter essential to living organisms through ecosystems
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biogeochemical cycles
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process which converts the energy of the sun into chemical energy
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photosynthesis
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the process used to convert molecules into usable energy
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cellular respiration
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the dry weight of all material in an ecosystems
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biomass
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the rate at which biomass is made in an ecosystem
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productivity
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the position of a species in a food chain is it's...
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trophic level
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species which feed on only plants
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herbivores
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species which occurs only in one community is called
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endemic
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a species which comes into a community and significantly changes it is called
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invasive
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a group of organisms with similar characteristics that can interbreed and product fertile offspring
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species
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organsims which get their energy direclty from the tissues of plants
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herbivores
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organisms which return the organic matter of dead organisms to the environment
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detritivores
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all members of a particular ecosystem
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community
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the vegetation in an ecosystem
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landscape
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the crust of the earth
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lithosphere
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a transitional area between ecosystems
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ecotone
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a terrestrial ecosystem
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biome
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broad leafed trees, midlatitudes, precipitation throughout the year
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temperate deciduous forest
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very little rainfall, rain often in isolated storm months or years, driest biome
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desert
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long, cold winters and short, cool summer. a few species of evergreens dominate a broad area
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boreal forest
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mild, wet winters; warm, dry summers, patches of evergreen shrubs, often dense, frequent fires
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chaparral
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year round rain and warm temperatures, high biodiversity, different species of trees
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tropical rain forest
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extreme to moderate temperature differences between winter and summer, diminished rainfall
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temperate grassland
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extremely cool winters with little daylight, dry cool summers, with long days, permafrost
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tundra
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warm year round with relatively low rainfall, half year wet and dry seasons, trees
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temperate rainforest
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holds the structure of the ecosystems together, often tertiary producers
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keystone species
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a species whose numbers are so low that they may not be able to produce a next generation
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endangered species
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species that colonize bare ground in the process of primary succession
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pioneer species
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an evironment's maximum population size
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carrying capacity
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an economist whose description of a "struggle for existence" in human populations greatly influenced Darwin's theory of evolution
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Thomas Malthus
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biologist who independently developed a theory similar to Darwin's
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Algred Russell Wallace
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all material in the universe that has mass and occupies space
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matter
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an intangible phenomenon tha tcan change the position, physical composition, or temperature, of matter
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energy
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organisms which make their own food from energy in the environment
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autotrophs
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the process which accomplishes this using the energy of the sun
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photosynthesis
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the specific environment in which an organism lives
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habitat
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an organism's use of resource and it's functional role in a community
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niche
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major regional complex of similar communities
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biome
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