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| is a general term for the tiny, free floating organisms that live in both freshwater and saltwater enviorments |
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| is an ecosysytem in which water either covers the soil or is present at or near the surface of the soil for at least part of the year |
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| are wetlands formed where rivers meet at sea |
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| is made up of tiny pieces of organic material that provide food for organisms at the base of the estuary's food web |
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| are temperate zone estuaries dominated by salt tolerant grasses above the low tide line and by sawgrasses under water |
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| are coastal wetlands the are wiespread across tropical regions |
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| photosynthesis is limited to this well lit upper layer |
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| below the photic zone and is permanently dark |
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| is the prominent horizontal banding of organisms that live in a particular habitat |
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| a giant brown alga that can grow at extrodinary rates |
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| extends from the low tide mark to the outer edge of the contienentel shelf |
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| animal whos hard calcium carbonate skeletons make up their primary structure |
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| organisms that live attached to or near the ocaen floor |
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| is a complex of terrestrial communities that covers a large area and is charcterized by certain soil and climate conditions |
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| or ability to survive and reproduce under conditions that differ from their optimal conditions |
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| climate in a small area that differs from the climate around it |
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| top layer in the rain forest |
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| the second layer of shoter trees and vines |
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| a tree that sheds its leaves during a particular season of each year |
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| trees or conifers produce seed bearing cones and most have leaves shaped like needles |
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| a material formed from decaying leaves and other organic matter that makes up soil |
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| a material formed from decaying leaves and other organic matter that makes up soil |
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| temperate zone of dense evergreen forests of coniferous trees |
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| a layer of permantly frozen subsoil |
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