Biomes and Aquatic Ecosystems

an area where freshwater from rivers mixes with salt water from the ocean

• eutrophication

• stream

• estuary

• pond

when large algae blooms deplete the oxygen in a water system, causing fish to die

• salinity

• estuary

• zooplankton

• eutrophication

A measure of how much salt is in water

• eutrophication

• estuary

• zooplankton

• salinity

microscopic animals that float freely in water

• benthos

• nekton

• zooplankton

the uppermost trees or branches in a forest

• benthos

• canopy

• estuary

• eutrophication

Lakes, ponds, and wetlands are __________ systems because they are still water

• lotic

• lentic

Streams, rivers, and creeks are _______ systems because they are flowing

• lotic

• lentic

Two of the most important factors that classify biomes are temperature and _______________.

• condensation

• vegetation

• precipitation

• evaporation

Which biome is characterized by both high temperatures and high levels of precipitation?

• desert

• boreal forest

• savanna

• tropical rainforest

Which biome is the only one that has permafrost?

• deciduous forest

• taiga

• tundra

• savanna