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21.2

TermDefinition
aphotic zone the deeper parts of the ocean where there is so little light that plants cannot carry out photosynthesis
benthic zone the bottom region of oceans and bodies of fresh water
estuary an area where fresh water from rivers mixes with salt water from the ocean' the part of the river where the tides meet the river current
eutrophic lake a lake that contains a large amount of decaying organic matter and lacks oxygen as a result
freshwater wetland an area of land that is covered in freshwater for at least part of a year
intertidal zone an area along ocean shorelines hat lies between low and high water lines
oceanic zone the regions of open sea that lie beyond and between the continental shelves
oligotrophic lake a lake that lacks organic nutrients and, as a result, contains high levels of dissolved oxygen in its lower layer
plankton the mass of mostly microscopic organisms that float or drift freely in the waters of aquatic environments
pelagic zone the upper, central, or open region of a body of water
photic zone the area of an aquatic system the receives enough light for photosynthesis to occur
neritic zone a shallow marine environment that is near the shore or over the continental shelf and that is rich in minerals and nutrients produced by biotic activity
Created by: Addaleigh