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chapter 21 vocab

chapter 21: ecosystems

TermDefinition
aphotic zone the deeper part 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 freshwater
biome a large region characterized by a specific type of climate and certain types of plant and animal communities
canopy the layer of treetops that shade the forest floor
chaparrel a type of vegetation that includes broad leafed evergreen shrubs and that is located in areas with hot dry summers and mild wet winters
epiphyte a plant that uses another plant for support but nor for nourishment
deciduous tree a tree that sheds and regrows its leaves in response to seasonal changes
desert a region that has little or no vegetation long periods of no rain and extreme temperatures usually found in warmer climates
estuary an area where freshwater from rivers mixes with salt water from the ocean; the part of the river were the tides meet the river current
freshwater wetland an area of land that is covered in freshwater for at least part of each year
intertidal zone an area along ocean shorelines that lies between low and high water lines
neritic zone a shallow marine environment that is near the shore or over the contenential shelf and that is rich in minerals and nutrients produced by biotic activity
oceanic zone the regions of the open sea that lies beyond and between the contenential shelves
oligotrophic lake a lake that lacks organic nutrients and as a result contains high levels of dissolved oxygen in its lower layer
permafrost in arctic regions the permanently frozen layer of soil and subsoil
pelagic zone the upper central or open region of a body of water
photic zone an area of an aquatic system that receives enough light for photosynthesis to occur
plankton the mass of mostly microscopic organisms that floaat or drift freely in the waters of aquatic (freshwater and marine) environments
taiga a region of evergreen coniferous forest below the arctic and subarctic tundra regions
temperature grasslands a region that has cold winters and rainfall that is intermediate between that of a forest and a desert
savanna a plain full of grasses and scatered trees and shrubs; found in tropical and subtropic habitats and mainly in regions with dry climates such as east africa
coniferous tree a tree belonging to a group of tree species that bear their seeds in cones and tend to be evergreen
eutrophic lake a lake that contains a large amount of decaying organic matter and lacks oxygen as a result
tropical forest a region of forest or jungle that is located near the equator and that is characterized by large amounts of rain and little variation in temperature
tundra a treeless plain that is located in the arctic or antarctic and that is characterized by very low winter temperatures, short cool summers and vegetation that consists of grasses likens and perennial herbs
temperature deciduous forest a region of forest that has pronounced seasons moderate temperatures and moderate precipitation; characterized by trees that shed their leaves in the fall
Created by: campbellm19