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Life Zones

Across
Bottom of the littoral zone
Chemical oxygen demand
Related to living things
An organism that makes its own food
How murky the water is
Aquatic biome
Aphotic zone
How much salt is dissolved in the water
Zone where sunlight reaches the bottom
Down
A non-living component of an ecosystem
An organism that eats other organisms
Water that is not salty
Waste produced by organims
Lives in the sediment
This range describes how much change in an environment an organism can take
Oxygen in water
Mix of fresh and marine water
Sunlit without a bottom
Lives ON the sediment
Biological oxygen demand