Ecology Test3 Ch 13

Front 1

Modes of Compitition

Back 1

1)Interference
2)Intraspecific
3)Interspecific

Front 2

Interference

Back 2

Direct aggressive interaction btwn individuals

Front 3

Intraspecific

Back 3

competition btwn individuals of the same species

Front 4

Interspecific

Back 4

competition btwn members of different species, reduces fitness of both

Front 5

Self-Thinning

Back 5

Higher population densities causing mortality among competing plants

Front 6

Niche

Back 6

summarizes environmental factors that influence growth, survival, and reproduction of a species

Front 7

Principle of Competitive Exclusion

Back 7

2 species with the same niches cannont coexist indefinitely
-one will ultimately be a better competitor

Front 8

n-dimensional hyper-volume

Back 8

-n equates the number of environmental factors important to survival and reproduction of a species

+Fundamental niche- hypervolume
+Realized niche- includes interaction that restricts environments where a species can live

Front 9

Lotka Volterra

Back 9

Effect of interspecific competition on population growth of each species

-predicts coexistance of 2 species when inter- is less than intraspecific competition

Front 10

Competitions and Niches

Back 10

Can restrict species to their realized niches.
-if strong and persuasive enough can cause evolutionary changes. change fundamental niches.

Front 11

Character Displacement

Back 11

Interspecific competition has been predicted to lead to directional selectionfor reduced niche overlap

Front 12

Character Displacement
(ness criteria)

Back 12

-Morph diff btwn sympatric species are greater than allopatric populations
-Diff btwn sympatric and allopatric species have genetic bias
-Diff bwtwn both evolved in place, and do not come from diff founder groups already differing in the character
-Variation in the character must have a known effect on use of resources
-Must be demonstrated competition for the resource and it must be directly correlated with character similarity
-Diffs in character cannot be explained by differences in resources available to each of the populations