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Ecology
Exam 1
14 cards·by alecia
population
a group of organisms of the same species in one location, at a given time
community
multiple opulations of different species
Biomes
biological regions of the Earth shaped by their physical environment
Subsidence
High pressure, dry, air falls toward surface. Arrid, desert regions
Uplift
Low pressure, wet, air moves upward, carries moisture with it & forms storms. Cold and dry
tundra
Altitudinal Zones
Less dense, warm air rises up the mountains. Atm loses moisture as you increase in altitude and
it rains.
reaction norm
the whole range of variation
Examples of avoidance
Desert plants, Skunk cabbage
Example of tolerance
Torpor/hibernation
"Darwinian Monster"
The perfect organism-would begin producing copious, well-endowed offspring immediately
after birth and continue to do so through a long life
Cole's paradox
Why be iteroparous? An immortal organism would have just as much reproductive success if it
increased reproduction by one & then died.
Lambda
Finite rate of increase. Per Capita Population Growth Rate
Discrete models
Show how population size changes from one time to the next (over discrete time intervals).
Continuous models
Show how population size changes over extremely small intervals