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28 Cards in this Set
- Front
- Back
the study of the interactions of living organisms with one another and with their environment
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Ecology
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place where a particular population of a species lives
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Habitat
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the many different species that live together in a habitat
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Community
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ecological system encompassing a community and all the physical aspects of its habitat
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Ecosystem
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physical aspects of a habitat
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Abiotic factor
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living organisms in a habitat
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Biotic facter
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the variety of species living within an ecosystem
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Biodiversity
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small, fast-growing plants that are the first organisms to lice in a new habitat
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Pioneer species
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the regular progression of species replacement that occurs after disturbance or the development of new habitat
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Succession
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succession that occurs in a newly formed habitat that has never before sustained life
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Primary succession
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an episode of succession that occurs in areas where there has been previous growth, such as abandoned fields or forest clearings
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Secondary succession
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the amount of organic material that the photosynthetic organisms of an ecosystem produce
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Primary productivity
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organism that makes its own food from energy and carbon atoms in its environment; autotroph
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Producer
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organism that must obtain energy to build its molecules by consuming other organisms; heterotroph
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Consumer
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a group of organisms that have the same source of energy; a step in a food chain
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Trophic level
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linear pathway of energy transfer in an ecosystem
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Food chain
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organism that eats only plants or algae
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Herbivore
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flesh-eating organism
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Carnivore
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animal that eats both plants and animals
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Omnivore
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organism that obtains its energy by feeding on dead organisms or wastes
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Detritivore
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organism that causes decay
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Decomposer
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a network of interconnected food chains in an ecosystem
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Food web
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diagram that depicts each trophic level in an ecosystem and how much energy is stored in each trophic level
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Energy pyramid
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the dry weight of tissue and other organic matter found in a specific ecosystem
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Biomass
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cycle in which a substance, such as carbon or water, enters into an environment’s living reservoir where it remains for a certain period of time and is returned to a nonliving reservoir
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Biogeochemical cycle
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water found beneath Earth’s surface
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Ground water
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loss of water from a plant through its stomata
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Transpiration
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process of combining nitrogen gas with hydrogen to form ammonia
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Nitrogen fixation
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