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Env Sci

Chapter 7

What is a wetland? An area where land is periodically underwater.
What are plankton? Organisms that cannot swim against currents, so they are drifters.
What are two types of plankton? Phytoplankton (drifting plants) and zooplankton (drifting animals).
What are nekton? Free-swimming organisms.
What are benthos? Bottom-dwelling organisms.
What is the littoral zone? Nutrient-rich zone in a lake or pond near the shore with diverse and abundant life.
What is the benthic zone? Bottom of a lake or pond which is inhabitated by decomposers, insect larvae, and clams.
What is eutrophication? An increase in the amount of nutrients in an aquatic ecosystem.
What are the two main types of freshwater wetlands? Marshes and swamps.
What is an estuary? An area where fresh water from a river mixes with salt water from the ocean.
What is a barrier island? An island that ofter runs parallel to sandy shores and protects the mainland and the coastal wetland from storms and ocean waves.
What is a coral reef? Limestone ridges built by tiny coral animals called coral polyps and the algae that live inside them.
What is coral bleaching? If the surrounding water is too hot or cold for too long, or if it is too muddy, polluted, or high in nutrients, the algae that live in the corals will leave or die and the coral turns white.
What are some threats to aquatic ecosystems? Sewage, industrial waste, agricultural runoff, overfishing.
What are the three groups of aquatic organisms? Plankton, nekton, and benthos.
What are the three groups of aquatic organisms? Plankton, nekton, and benthos.
Created by: msrowan