marine ecosystems 🪸 Flashcards
(27 cards)
ecosystem
a community and the interactions of living and nonliving things in an area.
biotic
parasitism
fouling
predation
competition for food
competition for space
abiotic
salinity ( extreme ph levels )
exposure to air
extreme temperatures
currents , turbulence and pressure
lack of sunlight
uv radiation
structure of the ocean
abyssal plains
continental rise
submarine canyon
continental slope
shoreline
continental shelf
costal plain
ocean current
a great surface movement of water in a well defined direction.
drift
a change in the direction of current caused by friction between wind and water.
upwelling
areas where minerals at the ocean floor are brought to the surface by currents.
surface current
movement of the surface water of the sea in a constant direction.
Northern hemisphere currents
the ocean currents move in a clockwise direction.
how are ocean currents named
ocean currents are named after the direction of the current , oceans , continental areas and after countries.
Southern hemisphere currents
the ocean currents move is a anti-clockwise direction.
factors that influence ocean currents
wind, earth’s rotation, water density, and gravity.
importance of ocean currents
regulate global climate, helping to counteract the uneven distribution of solar radiation reaching Earth’s surface.
economic exclusion zone
the zone around a country’s coastline that is under the control of that country.
quota
the legal limit in the amount of fish that can be caught.
cod end
the closed end of a fish net.
pelagic
fish that live near the ocean surface.
demersal
fish that are bottom dwellers.
fishing methods
farm fishing
pole and line(a fishing method used to catch tuna and other large pelagic (midwater) species one fish at a time.)
fly fishing
trapping
trawl net
is dragging a net through the water behind a boat. The fishery targets whiting, red hake, dogfish, crab, shrimp, and flounder.
combat overfishing
the government could implement closed seasons and protect some areas.
education for the larger population of the negative effects of overfishing.
jobs that depend on fishing
fisher man
sea food sellers
restaurant
ice production
fertiliser companies
people who sell fishing equipment
5 major fishing grounds
southafrica
east Asia
north of Madagascar
north west of Africa
north west of Europe
bottom trawler
a fishing method that uses a large net dragged along the ocean floor to capture fish and other marine life.
