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aphotic zone
biodiversity
biome
chaparral
chemosynthesis
climate
coral reef
desert
desertification
estuary
eutrophic lake
grassland
gyre
hydrothermal vent community
kelp forest
intertidal zone
limnetic zone
littoral zone
nearshore zone
northern coniferous forest
oligotrophic lake
open ocean
ozone hole
ozone layer
permafrost
photic zone
phytoplankton
plankton
profundal zone
rain shadow
savanna
temperate deciduous forest
temperate rain forest
tropical deciduous forest
tropical rainforest
tropical scrub forest
tundra
upwelling
wetlands
zooplankton
