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Chapter 26: Community Ecology, Predator-Prey Interactions, prey dependent …
Chapter 26: Community Ecology
Diversity
Diversity and Latitude
near equator
high diversity
far from equator
low diversity
temperate conditions- new conditions
earth was warmer
Metapopulations in Patchy Environments
Metapopulations
local populations
assumptions
many discrete livable patches
high quality patch
source habitat
sink habitat
low quality patch
possibility to become extinct
usually low
assisted dispersal
helping migration of animals or plants
difficult to guess correct patches
fugitive species
survives by colonizing new patches
some patches occupied, some not
death of patches and regrowth
Predator-Prey Interactions
Apparent Competition
the increase in one plant species, associated w the decrease in others
One Predator, One Prey
paradox of enrichment
too much improvement
loss of both species
maximum sustained yield
fixed effort harvesting
fixed quota harvesting
zero growth isocline
coexisting
line indicating population stability
predator
consumer
functional response
handling time
consumption time
feeding rates
time finding new prey
prey
producer
prey density
Competition Between Species
resource
a factor that leads to increased growth rates
competition
invasive
interference
restricts organisms but does not have to use resource
exploitation
restricts organisms by consuming shared resource
maximum equilibrium
Predator Selection Among Multiple Prey
factors to selecting
the probability that a particular prey will be encountered
the decision by the predator to attack an individual when encountered
successful consumption
optimal foraging theory
examines interactions to help understand why.
optimal diet model
predictions for choices
prefer prey yielding most energy per unit of handling time
if high-yield prey become scarce, then the predator would be more successful by broadening its diet to include prey that are low in energy.
less profitable prey will be ignored if more profitable prey is available
some prey items will always be eaten if encountered, others will never be eaten even if easy to obtain
prey dependent
