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Marine Science Test 3
Marine Science Test 3
64
Science
Undergraduate 1
05/02/2012

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Term
Diurnal Tide
Definition
A tide where there is only one high and low tide per day.
Term
Semi-Diurnal Tide
Definition
A tide with two high and low tides per day.
Term
Semi Diurnal Mixed Tide
Definition
A tide with two low and high tides per day that have different heights.
Term
Tidal Dattum
Definition
A reference zone for tides, where the tide equals zero.
Term
Equilibrium Tidal Theory
Definition
A theory that calculates tide forces involving the sun and moon.
Term
Dynamic Tidal Theory
Definition
Based off of the Equilibrium Tidal Theory but takes into account the Coriolis effect.
Term
Tidal Day
Definition
Each day earth moves an extra 12 degrees or 50 minuets, so a day is 24 hours + 50 minuets.
Term
Standing Rotary Tide
Definition
A tide that is a result of a standing wave moving around the central node of a basin.
- A high tide wave where the tide rotates counter Clockwise, the currents flow clockwise.
Term
Cotidal Line
Definition
A line of equal wave height.
Term
Corange Lines
Definition
Lines of equal tidal range in a rotary tide.
Term
Rotary Current
Definition
A tidal current that continousosly changes its direction of flow during a tidal period.
Term
Tidal Bore
Definition
A high tide crest that travels up an estuary or river as a breaking wave.
Term
Seasonal Tidal Changes
Definition
The summer months usually have a lower tidal range than the winter months. The summer berm is always below the winter berm.
Term
Berm
Definition
A nearly horizontal portion of the beach with an abrupt face, formed by wave movements.
Term
Long-Shore Transport
Definition
When the waves break at an angle to the coast.
Term
Drift Sector
Definition
The portion of long-shore transport that carries sediments.
Term
Rip Currents
Definition
A very strong tide/current that forms when two long-shore currents meet.
Term
Estuaries
Definition
Semi-isolated portion of ocean that is mixed with freshwater from the land.
Term
Fjord Estuary
Definition
An estuary with deep basins with limited mixing and high stratification.
- Can have low levels of Oxygen.
Term
Temperate Zone Estuaries
Definition
An estuary with lower salinity near the rive and higher salinity near the ocean.
Term
Flushing Time/Residence Time
Definition
The average time water is spent in an estuary.
Term
Causes of Climate Change
Definition
The major causes of climate change are attributed to CO2 and the burning of fossil fuels.
Term
Green House Gases
Definition
The two most common green house gases are carbon dioxide and methane.
- Methane is a stronger green house gas.
Term
Current Rates of Climate Change
Definition
Over history, temperature has Fluxuated do to levels of GHG in the atmostshpere. Today the rate is going faster than ever.
Term
Melting Ice
Definition
The excess heat is causing the ice to melt but only melting of land based sea ice will raise the total sea level.
Term
Hurricanes
Definition
Hurricanes only form where the water is 27 degrees C or higher.
Term
Gulf of Mexico Dead Zone
Definition
A portion of the Gulf of Mexico where the water is hypoxic. This is due to an influx of nutrients coming from the Mississippi river.
Term
Eutrophication
Definition
An area of water than has an over abundance of nutrients.
Term
Solid Wastes
Definition
Solid waste is a major environmental issue in the united states.
- Solid Waste - 1500 T
- Sewage - 65 T
- Dredged Material - 1075 T
- Industrial Waste - 1500 T
Term
Oil Spills
Definition
Another serious environmental issue. When this happens less than 10% of the oil actually gets cleaned up.
Term
Bioremediation
Definition
The addition of bacteria to a spill site, the purpose is for the bacteria to break down the oil.
Term
Wet Lands
Definition
A natural buffer between the land and the ocean. These recently have been filled in for development.
Term
Biological Invaders
Definition
Any ornganisims that invade and area where they aren't from.
- Crabs, muscles
Term
Photic Zone
Definition
A layer of water that revives ample sunlight and is usually less than 100m deep.
Term
Mesopealgic Zone
Definition
An oceanic zone from 200-1000m.
Term
Bathypelegic Zone
Definition
An oceanic zone from 1000m - 4000m
Term
Abyssopelagic Zone
Definition
A zone of the ocean which stretches from 4000m to the sea floor.
Term
Pelegic Water
Definition
The open ocean area of the ocean.
Term
Nertitic Zone
Definition
The area of the ocean right near the continental shelf.
Term
Small Organisms in the Ocean
Definition
Small organisms can exchange components with surrounding water by diffusion.
Term
Bacteria
Definition
Single celled organisms.
Term
Archaea
Definition
Very flexable organisms that can survive where most cannot.
- Thermal Vent Organisms
Term
Eukarya
Definition
All of the animal species.
Term
Plankton
Definition
Organisms that live in the water column and are moved by the moving ocean.
Term
Nekton
Definition
Organisms that live in the water column but are able to move with in it.
- Fish, Sharks
Term
Benthos
Definition
Organisms that live on the sea floor.
- Crabs, starfish
Term
Symbiosis
Definition
Close interactions between different organisms.
Term
Commensalism
Definition
A relationship where one organism benefits and the other is unaffected.
Term
Mutualism
Definition
Both organisms benefit.
Term
Parasitism
Definition
One of the organisms benefits while the other is harmed.
Term
Factors That Influence Marine Life
Definition
Factors can include light, available nutrients, salinity etc.
Term
Light and the Ocean
Definition
Available light in the ocean fluxuates with seasons and latitudes.
- Turbidity and water color can affect penetration.
Term
Autotrophs
Definition
Organisms that make their own food.
- Plants
Term
Hetrotrops
Definition
Organisms that need to eat others to consume energy.
Term
Buoyancy
Definition
Buoyancy is controlled by water density.
- Lower density water -> Float
- Higher Density Water -> Sink
- Organisms use oil/gas sacks to control this.
Term
Chemosynthsis
Definition
A form of production that uses hydrogen sulfide as the driving force.
Term
Limiting Factors on Primary Production
Definition
Some limiting factors include;
- Temperature of the water
- Available nutrients
- Available light
Term
Production in Polar Seas
Definition
The production depends on the amount of available light.
Term
Production in Tropical Waters
Definition
Production is limited by available nutrients.
Term
Production in Tropical Waters
Definition
Production is limited by available nutrients.
Term
Production in Temperate Waters
Definition
Production in temperate waters is limited by temperature and available nutrients.
Term
Ocean Gyre
Definition
A large rotating system of ocean currents
- Center has down-welling
- Clockwise in the NH
- N/S currents wind driven
Term
Red Clay
Definition
A sediment found where there is very little biological activity occurring.
Term
Compensation Depth
Definition
Where production of photosynthesis equals consumption.
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