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