Term
| Intraspecific Competition |
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Definition
| organisms of the same species compete for the same resources |
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Term
| Interspecific Competition |
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Definition
| organisms of different species compete for the same resources |
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Definition
Only 10% of the energy one receives is passed on to the next trophic level
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Definition
| Organic matter used as a fuel |
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Definition
An animal's feeding position on the food chain
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Definition
An organism that absorbs the sun's energy and converts it into food.
E.g. grass, wheat phytoplankton |
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Definition
Animals that get their energy from producers
(Basically animals that eat plants; herbivores)
E.g. deer, cows, rabbits |
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Definition
Animals that get their energy from primary consumers
(Animals that feed on plant-eating animals; Carnivores)
E.g. lions, foxes, snakes |
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Definition
Animals that eat secondary consumers
(Carnivores)
E.g. killer whales, sharks |
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Definition
| A species that plays a critical role in maintaining the structure of an ecological community and whose impaxt on the community is greater than would be expected based on its relative abundance |
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Term
| Density Dependent Factors |
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Definition
Factors whose effects vary with population density.
E.g. parasitism, food, disease |
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Term
| Density Independent Factors |
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Definition
Factors that affect the size of the population does not depend on the original size of the population
E.g. natural disasters |
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Definition
| The preying of one animal on others |
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Definition
A symbiotic relationship between two organisms of different species in which one (the parasite) benefits from a prolonged association with the other (the host)
E.g. mosquitoes, tapeworm |
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Definition
An association between two organisms in which one benefits and the other gets neither benefit or harm
E.g. a bird living in a tree |
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Definition
An association between two organisms in which both benefit from it
E.g. sea anemones and hermit crab |
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Definition
| An interaction between organisms or species in which the fitness of one is lowered by the presence of the other |
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Definition
| Interaction between two different organisms living in close physical association, typically to the advantage of both |
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Definition
| The maximum, (equilibrium) number of organisms of a particular species that can be supported indefinitely in a given environment |
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Definition
| The branch of biology that deals with the relations of organisms to one another and their physical surroundings |
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Definition
| Produced, relating to, or caused by living organisms |
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Definition
| Not derived from living organisms; physical rather than biological |
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Definition
A group of organisms of the same species living and interbreeding in the same area.
May change due to different factors such as death, births and movement of individuals between separate populations. |
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Definition
The reproductive rate of an organism or population measured by the number of sperm and egg
A measure of fertility. |
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Definition
Population growth in which the growth rate decreases with the increasing number of individuals.
When at maximum, growth rate is zero.
Population is limited by limiting factors such as shortage of food shelter and space |
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Definition
A growth in which the rate is proportional to the increasing number or size in an exponential or logarithmic progression
(Steady growth rate --limiting factors are out of the picture--) |
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| The action of coming to live permanently in a foreign country |
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Definition
| The act of leaving one's own country to settle permanently in another |
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