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12 Cards in this Set
- Front
- Back
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Def: Intraspecific Competition |
is an interaction in population ecology, whereby members of the same species compete for limited resources. Two bulls fight for a mate Two of the same species fighting for the same thing |
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Def: Interspecific Competition |
is a form of competition in which individuals of different species compete for the same resources in an ecosystem. A cat and a dog fight each other for your affection. Two different species fight for the same thing |
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Def: Density-Dependent Factors |
affects a population through increasing or decreasing birth and death rates, in a way that is directly related to the density of the population. A wolf population goes up from reproduction and deer population goes down because the wolves eat the dear and if there is more dear than there are more wolves |
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Definition: Density-Independent Factors |
It is when something outside the ecosystem affects the population usually in a negative way (Neg) Humans set a forest on fire leading to a decline of wildlife and vegetation, Local flooding forces animals to migrate to a different location (Pos) Humans feeding wild birds, Farm |
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Def: Carrying Capacity |
The maximum amount of occupants that can live
in a specific area The max amount of wolves has been reached because of the limits of resources, area, etc. |
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Discuss the effects of species introduction/extinction on a food chain: |
Two predators prey on two different prey. One prey gets extinct than there is more competition for the prey resulting in all parties resulting in a reduction of population. anything that connects to the prey will decline in population |
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Four factors that affect carrying capacity: |
Materials and energy Food chains Competition Density (Space) |
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State why exotic species are most successful than native species: |
They might not have any natural predators, therefore, dominating the ecosystem |
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Give Reasons for population crashes: |
scarcity of environmental resources that are needed for survival, growth and reproduction, predation, and waste accumulation. It can also be caused by an initially overpopulated group and competition between members of the same species.
Depletion of resources, density-independent factors, reduce carrying capacity |
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S Curve: |
The Pop. slows down and oscillates around the carrying capacity resulting in an "S curve" |
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J Curve: |
The pop. Increases rapidly above the carrying capacity, deplete the available resources and collapses resulting in a J curve. If the Environment is damaged beyond repair than the carrying capacity gets reduced |
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3 histograms and their charts: |
Growing: Wide base and a triangular shape Stable: Narrow base and a triangular shape Decline: Oval shape with a narrow base and top |
