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47 Cards in this Set

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abyssal ecosystem
the collection of organisms and the conditions that exist in the deep portions of the ocean
alpine tundra
the biome that exists above the tree line in mountainous regions
benthic
desrives organisms that live on the bottom of marine and freshwater ecosystems
benthic ecosystem
a type of marine or freshwater ecosystem consisting of organisms that live on the bottom
biochemical oxygen demand
the amount of oxygen required by microbes to degrade organic molecules in aquatic ecosystems
biome
a kind of plant and animal community that covers large geographic areas
boreal forest
a broad band of mixed coniferous and deciduous trees that stretches across North America;its northermost edge is integrated with the arctic tundra
climax community
last stage of succession; a relatively stable, long-lasting, complex, and interrelated community of plants, animals, fungi, and bacteria
coral reef ecosystem
a tropical, shallow-water, marine ecosystem dominated by coral organisms that produce external skeletons
desert
a biome that receives less than 25 centimeters of precipitation per year
emergent plants
aquatic vegetation that is rooted on the bottom but has leaves that float on the surface or protrude above the water
estuary
marine ecosystem that consists of shallow, partially enclosed areas where freshwater enters the ocean
euphotic zone
the upper layer in the ocean where the sun's rays penetrate
eutrophic lake
a usually shallow, warm water lake that is nutrient rich
freshwater ecosystem
aquatic ecosystem that has low amounts of dissolved salts
grassland
areas receiveing between25-75 centimeters of precipitation per year
limnetic zone
region that does not have rooted vegetation in a freshwater ecosystem
littoral zone
region with rooted vegetation in a freshwater ecosystem
mangrove swamp ecosystem
marine shoreline ecosystems dominated by trees that can tolerate high salt concentrations
marine ecosystem
aquatic ecosystems that have high salt content
marsh
area of grasses and reeds that is either permanently flooded or flooded for a major part of the year
northern coniferous forest
see boreal forest
oligotrophic lake
deep, cold, nutrient poor lakes that are low in productivity
pelagic
those organisms that swim in open water
pelagic ecosystem
a portion of a marine or freshwater ecosystem that occurs in open water away from the shore
periphyton
attached organisms in freshwater streams and rivers, including algae, animals and fungi
permafrost
permanently frozen ground
phytoplankton
free-floating, microscopic, chlorophyll-containing organisms
pioneer community
the early stages of succession that begin the soil-building process
plankton
tiny aquatic organisms that are moved by tides and currents
prairie
grasslands
primary succession
succession that begins with bare mineral surfaces or water
savanna
tropical biome having seasonal rainfall of 50-150 cnetimeters per year
secondary succession
succession that begins with the destruction or disturbance of an existing ecosystem
seral stage
a stage in the successional process
sere
a stage in succession
steppe
a grassland
submerged plants
aquatic vegetation that is rooted on the bottom and has leaves that stay submerged below the surface of the water
succession
regular and predictable changes in the structure of a community, ultimately leading to a climax community
successional stage
a stage in succession
swamp
area of trees taht is either permanently flooded or flooded for a major part of the year
taiga
biome having short, cool summers and long winters with abundant snowfall
temperate deciduous forest
biome tha thas a winter-summer change of seasons and that typically receives 75-150 centimeters or more of relatively evenly distributed percipitation throughout the year
tropical rainforest
a biome with warm, relatively constant temperatures where there is no frost. more then 200 centimeters of rain per year
tundra
a biome that lacks trees and has permanately frozen soil
zooplankton
weakly swimming microscopic animals
succession
the idea that communities modify through predictable changes over time