Transcript Slide 1

RIVERS
LAKES
BIOMES
OCEANS
Created by Jill Lenten
WETLANDS
REGIONS OF THE AQUATIC BIOME
The aquatic biome covers 75% of the earth’s surface.
Lake Superior
TEMPERATURE
Pacific Ocean
Although water temperatures can vary widely, aquatic areas tend
to be more humid and the air temperature on the cooler side.
Variants/Factors in Aquatic Biomes
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salinity
depth (pressure)
light
temperature
Marine biome
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75% of Earth is water
Contains the largest amount of biomass
Oceans vary in light, pressure, temperature
and nutrients.
lack of sediments in the water is a key factor
for marine species= light
Most important features in marine
biomes….
• LIGHT!
Ocean layers
• Euphotic Zone- surface waters
– Nutrient-rich water
– producers
• Aphotic Pelagic Zone- no light
– (below 650 feet)
• Benthic Zone- sea floor
– Sessile organisms (attached to sea floor)
Photic Zone
• Water penetrated by
light
• Includes open ocean
• Plankton
Aphotic zone
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Dark
High pressure
90 % of ocean
Adapted to living
in the deep
Freshwater Biomes
• Plant life
– shoreline
– Shallow water highly productive
• Temperature varies with depth
• Light
– Deep lakes = no photosynthesis
• Decay
– Takes place on the bottom
– Decomposers (bacteria) recycles nutrients