Unit 3 Module 3 Communities, Biomes and Ecosystems

30 percent freshwater found in the ice caps.

less than 3 percent freshwater containing no salt.

50 percent found in the oceans and ice caps

ecological succession

tropical succession

end point

primary community

secondary community

climax community

primary organisms

pioneer species

succession plants

desert

wetland

savanna

desert

wetland

savanna

wetland

grassland

boreal forest

temperatures

biodiversity

ability

dominant low-energy community likely to be an estuary

Communities adapted to shifting sands due to incoming waves

Communities stratified from the high-tide line to the low-tide line

Zone 1 = littoral

Zone 2 = limnetic

Zone 3 = profundal

Zone 1 = limnetic

Zone 2 = littoral

Zone 3 = profundal

Zone 1 = limnetic

Zone 2 = profundal

Zone 3 = littoral