Biology / Bio 3501 · Atom · ~20 seconds
Aquatic Biome Classification by Salinity and Zone
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Aquatic biomes classify by salinity into freshwater and marine systems, and within each by zone — the depth light and nutrients define, such as an ocean's intertidal, photic, and aphotic zones.
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The photic zone supports photosynthesis; the aphotic zone below receives no usable light.
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An aquatic biome's zone, not salinity alone, determines which adaptations residents need.