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Ch. 20 Earth's Ecosy

The earth's ecosystems

TermDefinition
abiotic describes nonliving factors in the environment
biome large region with specific climates, certain plants, and animals
savanna tropical grassland biome with scattered clumps of trees
desert hot/dry biome with organisms in high temperatures without rains
tundra far-northern biome characterized by long, cold winters; permafrost
permafrost permanently frozen ground below the soil surface in the arctic tundra
marine describes an ecosystem based on salty water
phytoplankton microscopic photosynthetic organism that floats near the surface
zooplankton protozoa that consume, form the base of the ocean's food web
estuary area where fresh water from streams/rivers spills into the ocean
tributary a small stream or river that flows into a larger one
littoral zone the zone of a lake/pond closest to the edge of the land
open-water zone from the littoral zone across the top only as deep as light reaches
deep-water zone zone of a lake/pond below the open-water zone with no light
wetland area of land where water level is near or above ground
marsh treeless wetland ecosystem with plants as cattails and rushes grow
swamp a wetland ecosystem in which trees and vines grow
Created by: swhite2015