Chapter 8: Aquatic Biodiversity

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64 Terms

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Euphotic zone
________: Phytoplankton, nutrient level low, dissolved oxygen levels high.
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Formation
Tiny animals (polyps) and algae have mutualistic relationships
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Warmer ocean temperatures leading to coral bleaching
Kill algae and thus the polyps
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Saltwater
The global ocean is divided into 4 areas
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Freshwater
Any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids
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Saltwater life zones (marine life zones)
Oceans, estuaries, coastlands, shorelines, coral reefs, and mangrove forests
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Freshwater life zones
Lakes, rivers, streams, and inland wetlands
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Plankton
Free floating
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Phytoplankton
Primary producers for most aquatic food webs
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Zooplankton
Primary and secondary consumers
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Ultraplankton
Tiny photosynthetic bacteria
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Nekton
Strong swimmers
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Examples
Fish, turtles, whales, etc
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Benthos
Bottom dwellers
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Examples
Oysters, sea stars, clams, lobsters, crabs, etc
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Decomposers
Mostly bacteria
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Turbidity
Degree of cloudiness in the water, inhibits photosynthesis
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Coastal zone
Warm, nutrient-rich, shallow
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Estuaries/Coastal Wetlands
Where rivers meet the sea and seawater mixes with freshwater (ex
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Seagrass Beds
Grow underwater in shallow areas, support a variety of marine species, stabilize shorelines, and reduce wave impact
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Mangrove forests
Along tropical and subtropical coastlines, 69 different tree species grow in saltwater
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Intertidal zone
Rocky shores or sandy shores which have barrier beaches
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Euphotic zone
Phytoplankton, nutrient level low, dissolved oxygen levels high
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Bathyal zone
Dimly lit, zooplankton and smaller fishes
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Abyssal zone
Dark and cold, high levels of nutrients, little dissolved oxygen, deposit feeders, filter feeders
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Point source pollution
Discharge pollutants at specific locations
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Standing (lentic) bodies of freshwater
Lakes, ponds, inland wetlant=ds
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Flowing (lotic) systems of freshwater
Streams and rivers
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Littoral zone
Near shore where rooted plants grow, high biodiversity,
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Examples
Turtles, frogs, crayfish, and some fish
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Limnetic zone
Sunlight area away from shore, main photosynthetic zone, some larger fish
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Profundal zone
Deepwater too dark for photosynthesis, low oxygen levels, with some fish
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Benthic zone
Decomposers, detritus feeders, and some fish, nourished primarily by dead matter
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Oligotrophic Lakes
Low levels of nutrients and low NPP with very clear water
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Eutrophic Lakes
High levels of nutrients and high NPP and murky water with high turbidity
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Mesotrophic Lakes
Commonly clear water lakes and ponds with beds of submerged aquatic plants and medium levels of nutrients
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Cultural Eutrophication
This occurs when sewage, detergents, fertilizers, and other nutrient sources are introduced into the ecosystem as a result of human water pollution, accelerating the aging process
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Freshwater
Any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids.
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Saltwater life zones (marine life zones)
Oceans, estuaries, coastlands, shorelines, coral reefs, and mangrove forests.
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Freshwater life zones
Lakes, rivers, streams, and inland wetlands
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Phytoplankton
Primary producers for most aquatic food webs
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Zooplankton
Primary and secondary consumers. Single-celled to large invertebrates like jellyfish
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Ultraplankton
Tiny photosynthetic bacteria
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Benthos
Bottom dwellers
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Turbidity
Degree of cloudiness in the water, inhibits photosynthesis
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Coastal zone
Warm, nutrient-rich, shallow. Shore to the edge of a continent shelf.
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Estuaries/Coastal Wetlands
Where rivers meet the sea and seawater mixes with freshwater (ex. river mouths, inlets, bays, sounds, salt marshes, and mangrove forests.)
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Seagrass Beds
Grow underwater in shallow areas, support a variety of marine species, stabilize shorelines, and reduce wave impact.
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Mangrove forests
Along tropical and subtropical coastlines, 69 different tree species grow in saltwater
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Intertidal zone
Rocky shores or sandy shores which have barrier beaches
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Euphotic zone
Phytoplankton, nutrient level low, dissolved oxygen levels high.
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Bathyal zone
Dimly lit, zooplankton and smaller fishes
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Abyssal zone
Dark and cold, high levels of nutrients, little dissolved oxygen, deposit feeders, filter feeders
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Point source pollution
Discharge pollutants at specific locations
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Standing (lentic) bodies of freshwater
Lakes, ponds, inland wetlands
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Flowing (lotic) systems of freshwater
Streams and rivers
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Littoral zone
Near shore where rooted plants grow, high biodiversity,
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Limnetic zone
Sunlight area away from shore, main photosynthetic zone, some larger fish
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Profundal zone
Deepwater too dark for photosynthesis, low oxygen levels, with some fish
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Benthic zone
Decomposers, detritus feeders, and some fish, nourished primarily by dead matter
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Oligotrophic Lakes
Low levels of nutrients and low NPP with very clear water
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Eutrophic Lakes
High levels of nutrients and high NPP and murky water with high turbidity
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Mesotrophic Lakes
Commonly clear water lakes and ponds with beds of submerged aquatic plants and medium levels of nutrients
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Cultural Eutrophication
This occurs when sewage, detergents, fertilizers, and other nutrient sources are introduced into the ecosystem as a result of human water pollution, accelerating the aging process.