freshwater pollution
41Water conflict — Water war redirects here. For the type of mock combat, see Water fight. Water conflict is a term describing a conflict between countries, states, or groups over an access to water resources.[1][2][3] The United Nations recognizes that water… …
42Demersal fish — Bluespotted ribbontail ray resting on the seafloor Demersal fish live on or near the bottom of the sea or lakes.[1] They occupy the sea floors and lake beds, which usually consist of mud, sand, gravel or rocks …
43Coral reef fish — The fish that inhabit coral reefs are numerous and diverse. Coral reef fish are fish which live amongst or in close relation to coral reefs. Coral reefs form complex ecosystems with tremendous biodiversity. Among the myriad inhabitants, the fish… …
44Oyster — For other uses, see Oyster (disambiguation). Crassostrea gigas from the Marennes Oléron basin in France The word oyster is used as a common name for a number of distinct groups of bivalve molluscs which live in marine or brackish habitats. The… …
45Seabird — This article is about the animal. For the alternative rock band of the same name, see Seabird (band). The Sooty Tern is highly aerial and marine and will spend months flying at sea, returning to land only for breeding.[1] Seabirds (also known as… …
46Water quality — A rosette sampler is used to collect samples in deep water, such as the Great Lakes or oceans, for water quality testing. Water quality is the physical, chemical and biological characteristics of water.[1] It is a measure of the condition of… …
47river — river1 riverless, adj. riverlike, adj. /riv euhr/, n. 1. a natural stream of water of fairly large size flowing in a definite course or channel or series of diverging and converging channels. 2. a similar stream of something other than water: a… …
48Upwelling — If the wind in blows parallel to the coast in the southern hemisphere (such as along the coast of Peru, where the wind blows North), then Ekman transport produces a net movement of surface water 90 degrees to the left. This can result in coastal… …
49Marine snow — Underway recovery of a sediment trap used to collect marine snow and estimate export production In the deep ocean, marine snow is a continuous shower of mostly organic detritus falling from the upper layers of the water column. It is a… …
50Marine conservation — Coral reefs have a great amount of biodiversity. Marine conservation, also known as marine resources conservation, is the protection and preservation of ecosystems in oceans and seas. Marine conservation focuses on limiting human caused damage to …
