Why Does Coastal Upwelling Lead To High Biological Productivity?

Why Does Coastal Upwelling Lead To High Biological Productivity??

Why does coastal upwelling lead to high biological productivity? It brings cold nutrient-rich water to the surface where phytoplankton reside. … This is where wind direction forces surface water away from the shore.

What does coastal upwelling lead to high biological productivity?

Water that rises to the surface as a result of upwelling is typically colder and is rich in nutrients. These nutrients “fertilize” surface waters meaning that these surface waters often have high biological productivity. Therefore good fishing grounds typically are found where upwelling is common.

Why are upwelling zones generally more productive than coastal oceans?

***Why are upwelling zones generally more productive than coastal oceans? … MORE TURBIDITY in coastal waters which limits the depth reached by solar radiation. Remembering that {sunlight & nutrients are necessary for photosynthesis} upwelling brings cold nutrient-rich waters up from depth to the surface.

How does an upwelling promote growth of organisms?

The deeper water that rises to the surface during upwelling is rich in nutrients. These nutrients “fertilize” surface waters encouraging the growth of plant life including phytoplankton. … Upwelling can also play an important role in the movement of marine animals.

Does upwelling and high biological productivity occur along the equator?

divergence of currents along the geographical equator cause upwelling of cold nutrient rich water. because this type of upwelling is common along the equator (especially in Pacific) it is called equatorial upwelling (high productivity).

Why are coastal areas more productive?

Another well-known mechanism for coastal productivity is river outflow. Natural and manmade nutrients—principally nitrates and phosphates—run off the land and fertilize marine plants. … These nutrient-rich oxygen-poor waters become dead zones driving animals to migrate or die.

Why do coral reefs tend to have such high biological productivity?

Why are algae beds coral reefs and tropical rainforests so productive? They are minimally affected by human activities. Primary producers in these areas have few predators. They are located near warm ocean currents that provide the primary producers with nutrients.

Why does upwelling increase biological productivity quizlet?

Why does upwelling increase biological productivity? It provides nutrients used by phytoplankton. Where on the globe does deep-water formation occur? The floats that are programmed to measure deep currents are called what?

Why is the productivity of the oceanic zone high even though nutrient levels are low?

Productivity in intertidal and neritic zones is high because sunlight is readily available and because nutrients are available from estuaries and deep-ocean currents. … The deepest part of the oceanic zone may have nutrients available from the substrate but lacks light to support photosynthesis.

Why are the world’s most productive fisheries located in areas of coastal upwelling?

Why are the world’s most productive fisheries located in areas of coastal upwelling? Nutrient-rich waters from the deep ocean are transported into the photic zone.

Why does coastal upwelling occur?

Winds blowing across the ocean surface often push water away from an area. When this occurs water rises up from beneath the surface to replace the diverging surface water. This process is known as upwelling. … Major upwelling areas along the world’s coasts are highlighted in red.

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Why are Downwellings important for marine environments?

Currents also are a major factor in ocean ecosystems. Two types of current motion upwelling and downwelling strongly influence the distribution and abundance of marine life. … When currents upwell or flow up to the surface from beneath they sweep vital nutrients back to where they’re needed most.

Why are upwelling zones productive?

Upwelling regions are often measured by their productivity due to the influx of nutrients to the surface mixed layer and euphotic zone (sunlit layer) by upwelling currents. This drives photosynthesis of phytoplankton (tiny alga) which form the base of the ocean food web.

Why biological productivity is so high in the equatorial region?

To replace it nutrient-rich water is drawn up from the ocean depths bringing a steady supply of nutrients to the sunlit surface and producing a band of consistently high primary productivity at the equator. Historically high sperm whale abundance has been recorded in this area.

What are most likely the effects of ocean upwelling group of answer choices?

Effects of Upwelling

Because the deep water brought to the surface is often rich in nutrients coastal upwelling supports the growth of seaweed and plankton. These in turn provide food for fish marine mammals and birds. Upwelling generates some of the world’s most fertile ecosystems.

Is the productivity higher on the eastern coast or the western coast of the Galapagos Islands?

Areas of high productivity occur along the South American coast as the Humbolt current joints the Equatorial Current and on the western sides of the larger Galapagos Islands. The windward sides of the islands the southeast receive more moisture than the leeward sides.

Why coastal waters are more productive than the open ocean?

Coastal waters are more productive than the central ocean for two main reasons. First runoff from land often contains a high abundance of nutrients which get deposited in coastal waters and stimulate production.

What factors affect productivity in the ocean?

Ocean Productivity. Abiotic factors like solar radiation and nutrients and biotic factors like zooplankton predation may affect ocean primary productivity. Productivity varies with the season and also locally and globally.

Is productivity higher on the land or in the sea?

(1) estimate that there is roughly 80 times more biomass on land than in the oceans. … The lower productivity of the ocean per unit area is due largely to poorer light penetration in water (2).

Why is the marine environment productive?

The most productive waters of the world are in regions of upwelling. Upwelling in coastal waters brings nutrients toward the surface. Phytoplankton reproduce rapidly in these conditions and grazing zooplankton also multiply and provide abundant food supplies for nekton.

What are three environments that have exceptionally high biological productivity in the tropical ocean Why are they so productive?

Three environments that have exceptionally high biological productivity in the tropical oceans are equatorial upwellings coastal upwellings and coral reefs. – Equatorial Upwelling – Have high productivity due to trade winds driving westerly equatorial currents on either side of the equator.

Why do polar regions tend to have higher primary productivity?

Primary productivity is strongly dependent upon light availability and the presence of nutrients and thus is highly seasonal in the Arctic.

Why is the open ocean so less biologically productive than the coastal zone?

Because of the density difference between surface water and the deep sea across most of the ocean ocean circulation can only very slowly reintroduce dissolved nutrients to the euphotic zone. By driving nutrients out of the sunlit buoyant surface waters ocean productivity effectively limits itself.

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Why do temperate oceans tend to be more productive than tropical oceans?

In the ocean the surface water gets very warm and remember that warm water is less dense than cold. This means the warm water in effect gets stuck above the cold water where all the nutrients are. … So the ocean is more productive in temperate zones. This also explains why the tropics have that pretty clear blue water.

Why is compensation depth significant to primary productivity in the ocean?

What is compensation depth? Why is it significant to primary production in the ocean? The point of zero net primary production. If Phytoplankton remain below the compensation depth for more than a few days they will die.

Why does the ocean have low productivity?

In ocean sunlight is the main limiting factor which decreases the rate of photosynthesis. … Minerals and nutrients can also be a retarding factor based on location of the oceans.So there will be less productivity than land which is 170 billion tons compared to 55 billion tons ion oceans.

Where in the ocean is plankton productivity the greatest Why?

Where in the ocean is plankton productivity the greatest? Why? Salt marshes and groves have the highest plankton productivity because of the vast amount of nutrients in the environment. There are more parasitic species of animals than all other sorts combined.

Which region of the ocean is most likely to be the most productive?

Although they occupy just fewer than two percent of the surface of the oceans the large coastal upwelling areas on the eastern edges of the Pacific and the Atlantic are among the most biologically productive marine areas of all.

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How does coastal upwelling enhance fish populations?

Areas of coastal upwelling have a greater supply of nutrients to support animal life. Wide continental shelves provide excellent locations for large populations too. Name an area of the world in which the ocean is rich with food resources but where those resources are not extensively harvested.

How do Downwellings and upwellings affect nutrient and oxygen contents?

Downwelling is where surface water is forced downwards where it may deliver oxygen to deeper water. … As the surface waters diverge deeper water must be brought to the surface to replace it creating upwelling zones. The upwelled water is cold and rich in nutrients leading to high productivity.

How can upwellings improve fishing for ocean fishermen?

How can upwellings improve fishing for ocean fishermen? They cause the ocean water to get warmer. They bring nutrients from the cold deep ocean waters.

Why are upwellings important to ocean ecosystems?

The deeper water that rises to the surface during upwelling is rich in nutrients. These nutrients “fertilize” surface waters encouraging the growth of plant life including phytoplankton. … Upwelling can also play an important role in the movement of marine animals.

How does coastal upwelling affect ecosystems?

Ecosystem productivity in coastal ocean upwelling systems is threatened by climate change. Increases in spring and summer upwelling intensity and associated increases in the rate of offshore advection are expected. … With upwelling intensification ocean acidity will rise affecting organisms with carbonate structures.

Why is upwelling important for the commercial fishery industry?

Why is upwelling important for the commercial fishery industry? … Upwelling brings nutrient-rich waters to nutrient-poor surface waters. 2. Upwelling takes nutrient-rich water from the surface to the bottom of the ocean.

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