4. notes and revision

this is a system of waterflows and storages that may be disrupted by human activity

flooding

freezing condensation evapotranspiration because its both from trees and water bodies

ocean lakes rivers

Water pollution Intense irrigation DEFFORESTATION GWEICO

These are movements of water both vertically and horizontally.

These are moved by the wind

these are moved by the ocean belt

This is when there is insufficient water to meet the needs of a population this is the reduction of water levels

This is the reduction of water quality making it unsustainable for use

GWEIC Global warming Waterpollution intense irrigation Eutrophication Climate change = less rain Low water level in water bodies due to evapouration due to increasing global temperatures Fertilizers polluting streams Intensive irrigation; water evapourates even before reaching plants

Increase reserviours Rainwater harvesting Plant drought resistant crops reduce pesticide use Education Legislation restoration

The continental shelf is the extension of continents under the seas and oceans.

Phytoplankton are single-celled organisms that can photosynthesize

Benthic – living on or in the sea bed

Pelagic – living surrounded by water from above the sea bed to the surface.

aquaculture is the farming of aquatic organisms with interventions in the rearing process.

Impacts of fish farms include: ●➔ loss of habitats ●➔ pollution (with feed, antibiotics and other medicines added to the fish pens) ●➔ spread of diseases ●➔ escaped species including genetically modified organisms which may survive to interbreed with wild fish ●➔ escaped species may also outcompete native species and cause the population to crash. reducing biodiversity

the tragedy of the commons is when the selfish actions of the individual to exploit common resources affect society as a whole.

A maximum sustainable yield (MSY) is the greatest amount of yield that can be exploited each year without depleting the original stock.

This is the contamination of a waterbody by pollutants either directly or indirectly.

Point source/ non-point source organic eg human waste/ inorganic eg nitrates

BLEW Water borne disease Eutrophication (pollutingfertilizers with phosphates) Bioaccumulation/ Biomagnification in food chain Lossof aquatic life