WATER POLLUTION SOURCES

Categories of water pollution  Point source -can easily identify the source  Nonpoint can’t identify the source of the pollutant. It may have occurred at another location and filtered, moved, to the current location.

1.Industry 4 Main Sources  THERMAL Pollution  Leaks into Ground Water  Ocean dumping  Eutrophication

1. Thermal Pollution  When temperature in water increases  Power Plants use water from lakes & rivers to cool their equipment down –Released water is warmer, but cleaner. However,…  Warmer water reduces the O 2 in the water  As temperature O 2 decreases  This affects organisms in the water

2. GROUND WATER POLLUTION Gasoline, Sewage, Toxins

3. Ocean Pollution 88885% of all ocean pollution comes from land – c– c– c– cars leaking, littering, storm drains. CCCCruise Ships –a–a–a–are legally allowed to dump waste & garbage at sea Oil Tanker Spills

SPILLS FROM OIL TANKERS Affect Wildlife

4.Eutrophication Excess Nutrients in Water

Artificial Eutrophication- when humans cause the problem  Over abundance of nutrients in H2O  use of fertilizer nitrogen & detergents with phosphate  Creates an algae bloom  Eventually, the algae die and go to the benthic zone  The bacteria in the benthos metabolize the algae take in O2 and give off CO 2.  This can lead to a fish kill due to depleted O 2 in the water.

1. Over abundance of nutrients In the water from Fertilizer or detergents 3. The algae die & sink to the benthic zone in the H2O where bacteria are. 2. Leads to an Algae Bloom 4. Decomposer bacteria eat the Algae. The bacteria take in O2 & release CO2 5. Reduced O2 in H2O May kill fish & other organisms. Steps of Artificial Eutrophication

ESTUARIES

ESTUARY  AREA WHERE FRESH WATER MIXES WITH SALT WATER  WHERE THE TWO MEET RICH IN SEDIMENT, NUTRIENTS  BECOMES A NUTRIENT TRAP  PLANKTON IS ABUNDANT  SHELL FISH & BIRDS LIVE & BREED IN THEM  REEDS/GRASSES FILTER POLLUTANTS IN THEIR ROOTS  THE PLANTS ALSO PREVENT EROSION OF THE LAND

ENDANGERED SPECIES  WHEN an animal is threatened with extinction  HOW do animals become endangered?  HUNTING  DISEASES  HABITAT DESTRUCTION leading cause

WHY SAVE ENDANGERED SPECIES?  MEDICINAL USES- TOP 100 drugs from PLANTS  Balance food webs & diversity, –ECOSYSTEM is MAINTAINED  If a KEYSTONE species is lost, example salmon, it could effect many other organisms in the food web.