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Chapter 6

TermDefinition
biome a group of ecosystems that share similar abiotic and biotic conditions
climate the average conditions, including temperature and precipitation, over long periods in a given area
weather the day-to-day conditions in Earth's atmosphere like "sunny and humid" or "cold and snowy"
climatographs the conditions in a biome
net primary production the organic matter, or biomass, that remains after cellular respiration
canopy dense covering that towers 50 to 80 meters above the ground
emergent layer the top layer of the rain forest
understory shorter trees and plants
epiphyte plant that grows on other plants instead of in soil
deciduous trees that lose their leaves and stop photosynthesis during part of the year
estivation deep, sleeplike, period of dormancy
coniferous trees that produce seed-bearing cones
hibernation a deep, sleeplike state that an animal enters for most of the winter.
permafrost underground soil that remains frozen year-round
salinity measures the amount of salts dissolved in water
photic zone the uppermost layer of an aquatic ecosystem where there is enough sunlight for photosynthesis
aphotic zone where no sunlight penetrates and photosynthesis cannot occur
benthic zone the very bottom of a body of water
littoral zone the shallow near-shore portion of the photic zone
limnetic zone farther from the shore, where there are no rooted plants
wetland area of land that are flooded with water at least part of the year
flood plain area's nearest a river's course that are flooded periodically
estuaries bodies of water, partly enclosed by land, that occur where fresh water from land drainage meets the water of an ocean or inland sea
upwelling the vertical flow of cold, nutrient-rich, water towards the surface, occurs where horizontal currents diverge, or flow away from one another
Created by: ellisha
 

 



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