aphotic zone

biodiversity

chemosynthesis

chaparral

climate

deserts

desertification

estuaries

Eutrophic lakes

ozone layer

ozone hole

rain shadow

gyres

tropical deciduous forests

tropical rain forest

tropical scrub forest

savanna

grassland

temperate deciduous forest

temperate rainforest

northern coniferous forest

tundra

permafrost

plankton

phytoplankton

zooplankton

littoral zone

limnetic zone

profundal zone

wetlands

photic zone

Oligotrophic lakes

intertidal zone

nearshore zone

open ocean

kelp forests

coral reefs

hydrothermal vent community

Upwelling