Download Ecology Powerpoint Review

The Science Test
Individual
Population
Ecosystem
Population – group of a single species living in
the same place
Communities - group of interacting
populations
Ecosystem – the community and its
environment
Biome – group of ecosystems with the same
communities
Biosphere – the circle of life
Food Chains – one
path of energy flow
 Food Webs –
complex model that
expresses all the
possible feeding
relationships in a
community
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Predation + - Predator kills the
prey for food
Competition - - both compete for
same resources
Parasitism + - parasite lives in or
on host
Mutualism + + symbiotic
relationship in which both benefits
Commensalism + 0 symbiotic
relationship in which one benefits
and the other is not harmed
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Climate – temperature and rainfall
6 major biomes
 Tundra
 Coniferous Forest
 Deciduous Forest
 Grasslands
 Desert
 Tropical Rainforest

Amount of light, oxygen
and salinity
 Lakes
 Ponds
 Wetlands
▪ Marshes
▪ Swamps
▪ Estuaries
 Coral Reefs
 Deep Ocean

Primary Succession: The process of creating
life in an area where no life previously existed.
 New volcanic islands, glacial retreat, rocks

Secondary Succession: The process of restabilization that follows a disturbance in an
area where life has formed an ecosystem.
 Abandoned farms, forest fires, volcanic eruptions
1st year
Horseweed
dominant;
crabgrass,
pigweed
2nd year
Asters
dominant;
crabgrass
3rd to 18th
year
Grass scrub
community;
broomsedge
grass, pines
coming in
during this
stage
19th to 30th
year
Young pine
forest
30th to 70th
year
Mature pine
forest;
Understory
of young
hardwoods
70th to 100th
year
Pine to
hardwood
transition
100th year
plus
Climax oakhickory forest