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Niche partitioning

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Competition Prep

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Last updated

6 years ago

Date created

Mar 1, 2020

Cards (15)

Section 1

(15 cards)

Niche partitioning

Front

Competing species use the environment differently in order to reduce interspecific competition

Back

How do warblers on pine trees reduce interspecific competition?

Front

Niche partitioning - each species occupies a different part of the tree

Back

6 mechanisms by which competition occurs

Front

Consumption Preemption Overgrowth Chemical interaction Territorial Encounter

Back

Character displacement

Front

Differences between similar species with overlapping geographic ranges are accentuated in regions where both species occur, but minimised in regions where ranges don't overlap

Back

Realised niche

Front

Set of conditions under which an organism actually lives (smaller than fundamental niche due to interspecific competition)

Back

Scramble competition

Front

All competing individuals get some of the limiting resource, so quantity per individual decreases with increasing population density (so all individuals decline in fitness)

Back

Interference competition

Front

Direct physical interactions over resources

Back

Gause's principle of competitive exclusion

Front

2 species with identical niches cannot coexist indefinitely

Back

Territory

Front

Defended area of an animal's home range

Back

Exploitative competition

Front

One individual inhibits the use of a resource by another individual by accessing it first

Back

Fundamental niche

Front

Set of conditions under which an organism could potentially live

Back

What is a benefit of character displacement?

Front

Reduces interspecific competition

Back

Home range

Front

Area in which an animal normally ranges

Back

Self-thinning rule

Front

Plants decrease in population density (self-thin) as the total biomass of the population increases

Back

Contest competition

Front

The limited resource is only obtained by the fittest individuals

Back