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Pollutants from human production activity can buildup and run into lakes and streams. This damages both the animal and plant population of the aquatic habitat.

-Thomas

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Lakes

Wetlands

Streams and Rivers

Estuaries

Intertidal Zones (Oceanic)

Ocean Pelagic Zone (Oceanic)

Coral Reefs (Oceanic)

Marine  Benthic Zone (Oceanic)

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cnidarians - a Phyllum
Coral Reefs generate large amounts of oxygen

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Includes coral reefs, a biome created by a group of cnidarians that secrete hard calcium carbonate shells, which vary in shape and support the growth of other corals, sponges, and algae. Coral reefs are among the most productive ecosystems on Earth.

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2 types-
#1 Standing bodies of water, such as lakes or wetlands
In lakes communities are distributed according to the water depth.
Oligotrophic lakes are deep lakes that are nutrient poor and oxygen rich and contain sparse phytoplankton.
Eutrophic lakes are shallower, and they have higher nutrient content and lower oxygen content with a high concentration of phytoplankton

#2 Moving bodies of water, such as streams and rivers
the prominent physical attribute is the current. Organisms are distributed in vertical
zones and from the headwaters to the mouth.
Estuaries are areas where freshwater streams or rivers MERGE with the ocean. Estuaries are among the most productive habitats on Earth.

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Make up the largest part of the biosphere because water covers roughly 75% of Earth's surfaces.  These biomes are classified into freshwater biomes and marine biomes. Most aquatic biomes displa vertical stratification. For example, the photic zone includes teh upper layer of water in which there is enough light for photosynthessi to occur, whereas the aphotic zone is characterizd by very low light penetration.