Ch. 6 Aquatic Biodiversity
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Transcript of Ch. 6 Aquatic Biodiversity
Ch. 6 Aquatic Biodiversity
Where does the color of the coral come from?
What are benefits of coral reefs?
75% of Earth is covered with waterSalinity of the water determines the type of life that can
survive
Benefits of a marine ecosystem.
Levels of ocean feeders:Plankton
PhytoplanktonZooplanktonUltraplankton
NektonTurtlesfish
Benthos- bottom dwellersOysters, lobsters, crabs, worms
DecomposersSpecialized bacteria
Ocean LayersEuphotic zone: brightly lit surface layer.
Nutrient levels low, dissolved O2 high, photosynthetic activity.
Bathyal zone: dimly lit middle layer.No photosynthetic activity, zooplankton and
fish live there and migrate to euphotic zone to feed at night.
Abyssal zone: dark bottom layer. Very cold, little dissolved O2.
Estuary and Coastal WetlandsEstuaries are rivers that meet the sea where
seawater mixes with freshwater.
Coastal wetlands are land areas covered with water some or all of the year.river mouths, inlets, bays, sounds, salt
marshes=temperate zonesMangrove forests=tropical zones
Mangrove Forests
The coastal zone
Types of LakesOligotrophic- lacking nutrients, cold, clear,
low NPPtrout
Eutropic- well nourished, shallow, murky, high NPP
Mesotrophic- between two extremesCultural eutrophication- when runoff from
farmland and building sites increases nutrients in lakes quickly
Benefits of Inland wetlandsReplenish streams during droughtReplenish aquifersMaintain biodiversitySupply products like fish, timber