Chapter 6 Test
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Exponential Growth Curve
J - shaped
Logistic Growth Curve
S- shaped /Carrying capacity=K
Overshoot
When population is over K
Die off
Population crash (limiting factors used up)
Keystone species
Have massive effect on ecosystems if removed (starfish/otters)
K -selected species
Protective of their few offspring, large life spans, usually bigger (Humans/elephants) Type 1 curve
R - selected species
Not protective of offspring, lots of offspring, low survival rate and life expectancy (Frogs) Type 3 curve
Primary succession
colonization of lifeless area with no previous inhabitants and no topsoil (bare rock)
Secondary succession
colonization of lifeless area with topsoil that was previously disturbed or destroyed
Aquatic succession
When a body of water becomes land over large period of time
Intrinsic growth rate
Maximum potential for population growth with ideal conditions unlimited resources
Pioneer species
Species that first populate an area in succession (lichen/moss)
Competitive exclusion principle
When two species that compete for the same resources must result in one species having a higher population than the other when in the same area. No two species can occupy
Metapopuation
Populations that are distributed spatially but are linked with occasional movements (butterflies)
Temporal resource partitioning
Using the same resource at different times
Spatial resource partitioning
Using different areas of the same resource
Morphological resource partitioning
Evolving
Density independent factors
Factors impact population size that are not influenced by a population size (chance) Disasters
Density dependent factors
Factors impact population size reliant on population size (disease, resources, competition etc.)