community stability
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ability to stay or return to structure & function after disturbance
trophic facilitation
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a consumer receives indirect benefit due to a positive
interaction between its prey and another species
,Dynamic equilibrium model
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Disturbance freq, intensity + competitive displacement rate combine to
determine species diversity.
Max when disturbance and displacement are roughly equivalent.
keystone species
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has a large effect on species diversity of communities despite their small
size and abundance; usually by indirect effect
e.g. sea otter
community differences in species accumulation
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some need much greater sampling effort to estimate the
overall species richness. (Richness of soil bacteria so high,
each sample was a new species)
turnover
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The change in
species diversity and composition
from one community type to
another across the landscape
(beta diversity)
high turnover (little overlap of alpha and gamma???) = high beta diversity
competition
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Non-trophic interaction where all individuals/species are harmed
gamma diversity
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regional biodiversity over a large area with many types of habitats
Hutchinson's model
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tc = time one species to outcompete another
te = time environmental variation to act on growth of competing species
tc<<te, exclusion too fast
Give this one a try later!
ability to stay or return to structure & function after disturbance
trophic facilitation
Give this one a try later!
a consumer receives indirect benefit due to a positive
interaction between its prey and another species
,Dynamic equilibrium model
Give this one a try later!
Disturbance freq, intensity + competitive displacement rate combine to
determine species diversity.
Max when disturbance and displacement are roughly equivalent.
keystone species
Give this one a try later!
has a large effect on species diversity of communities despite their small
size and abundance; usually by indirect effect
e.g. sea otter
community differences in species accumulation
Give this one a try later!
some need much greater sampling effort to estimate the
overall species richness. (Richness of soil bacteria so high,
each sample was a new species)
turnover
, Give this one a try later!
The change in
species diversity and composition
from one community type to
another across the landscape
(beta diversity)
high turnover (little overlap of alpha and gamma???) = high beta diversity
competition
Give this one a try later!
Non-trophic interaction where all individuals/species are harmed
gamma diversity
Give this one a try later!
regional biodiversity over a large area with many types of habitats
Hutchinson's model
Give this one a try later!
tc = time one species to outcompete another
te = time environmental variation to act on growth of competing species
tc<<te, exclusion too fast
