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35 Cards in this Set
- Front
- Back
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Abiotic Factor |
Non-living organisms in an environment |
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Biotic Factors |
Living organisms in an environment. |
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Habitat |
It is the natural environment in which an organism lives, or the physical environment that surrounds a species population. |
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Herbivore |
An organism that only eats plants. |
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Omnivore |
An animal that includes both plants and animals in its normal diet. |
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Producer |
organisms that can make their own energy through biochemical processes |
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heterotroph |
depend either directly or indirectly on autotrophs for nutrients and food energy. |
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Food Chain |
the sequence of transfers of matter and energy in the form of food from organism to organism |
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Population Density |
The measure of the number of organisms that make up a population in a defined area. |
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Population Model |
a type of mathematical model that is applied to the study of population dynamics. |
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Density Independent Factor |
Any factor limiting the size of a population whose effect is not dependent on the number of individuals in the population. |
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Biome |
a large naturally occurring community of flora and fauna occupying a major habitat. |
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Community |
a group of actually or potentially interacting species living in the same place. |
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Organism |
An individual form of life. |
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consumer |
organisms that get their energy from eating other organisms. |
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detritivore |
An organism that feeds on and breaks down dead plant or animal matter, returning essential nutrients to the ecosystem. |
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decomposer |
organisms that break down dead or decaying organisms. |
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Primary Consumer |
herbivores, feeding on plants and fungus. |
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Tertiary Consumer |
a carnivore at the topmost level in a food chain that feeds on other carnivores. |
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Population size |
the actual number of individuals in a population. |
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Dispersion |
when individuals or seeds move from one site to a breeding or growing site. |
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Exponential Growth Curve |
A curve on a graph that records the situation in which, in a new environment, the population density of an organism increases rapidly in an exponential or logarithmic form, but then stops abruptly as environmental resistance. |
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Density Dependent Factor |
Any factor limiting the size of a population whose effect is dependent on the number of individuals in the population. |
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Biosphere |
the global ecological system integrating all living beings and their relationships, including their interaction with the elements of the lithosphere, geosphere, hydrosphere, and atmosphere. |
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Ecosystem |
a biological community of interacting organisms and their physical environment. |
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Population |
a group of interbreeding individuals of the same species, which is isolated from other groups. |
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carnivore |
An animal that only eats meat. |
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trophic levels |
comprising organisms that share the same function in the food chain and the same nutritional relationship to the primary sources of energy. |
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autotroph |
an organism that serves as a primary producer in a food chain. |
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Secondary Consumer |
mainly carnivores, and prey on other animals. |
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Food Web |
a system of interlocking and interdependent food chains. |
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Carrying Capacity |
the maximum population size of the species that the environment can sustain indefinitely. |
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Logistic Model |
a statistical model; in epidemiology, a model of risk as a function of exposure to a risk factor. |
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r-strategist |
those that place an emphasis on a high growth rate, and, typically exploit less-crowded ecological niches, |
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k-strategist |
species whose populations fluctuate at or near the carrying capacity (K) of the environment in which they reside.. |
