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Plant Ecology
29 Ch. 10: Competition
8
Biology
Undergraduate 3
04/23/2009

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Term
1) Direct (interference) competition
2) Exploitation competition
Definition
Types of Competition
Term
– 1) Energy (light): aboveground
– 2) Water: soil
– 3) Nutrients: mostly soil
– 4) Mutualists: pollinators, seed dispersers, etc.
Definition
What plants compete for?
Term
Serpentine versus normal soils

Granite outcrop: depth of soil in soil pools
Definition
Examples of stress gradients
Term
Lichen: partnership between fungi and unicellular photosynthesizer (green alga or cyanobacteria)
Definition
Mutualism example
Term
Intraspecific competition
Definition
competition between members of one species
Term
Alpha: competition coefficient
Definition
Expresses effect of individual of species 2 on individual of species 1
Term
Beta: competition coefficient
Definition
Expresses effect of individual of
species 1 on individual of species 2
Term
Competition often asymmetric
Definition
effect of species 1 on species 2
is not same as that of species 2 on species 1
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