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Biology-19-Populations In Ecosystems > Competition > Flashcards

Flashcards in Competition Deck (5)
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1

When does intraspecific competition occur

When individuals of the same species compete with one another for resources such as food, water, breeding sites

2

What determines the size of a population

The availability of such resources.

The greater the availability, the larger the population

The lower the availability, the smaller the population

3

When does interspecific competition occur

When individuals of different species compete for resources such as food, light, water

4

When populations of two species are competing with each other what tends to happen

One will normally have a competitive advantage over the other. The population of this species will gradually increase in size while the population of the other will diminish

5

What does the competitive exclusion principle state ?

That where two species are competing for limited resources, the one that uses these resources most effectively will ultimately eliminate the other.

No two species can occupy the same niche indefinitely when resources are limiting