Why can cyanobacteria survive in nutrient poor water?
They are nitrogen fixers, gaining nitrogen from N2 gas dissolved in the water.
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15
What is Meroplankton?
species of zoo plankton that spend only part of their lives as part of the planktonic community.
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15
Why is primary production so much higher near the equator?
Constant wind blowing parallel to the equator, which pushes surface water away, bringing up nutrient rich deep water up to the surface,
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15
What is the difference between the prefixes 'mero" and "holo"?
"mero" means part and "Holo" mean whole
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What is so beneficial about cyanobacteria?
They are picoplankton that are nitrogen fixers.
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What is vertical migration?
Daily movement of small marine organisms between the photic zone and deeper depths.
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How is the weather in India connected to the weather in Peru and Chile?
They are part of a phenomenon called El Nino Southern Oscillation (ENSO)-a sea saw effect of barometric pressure, resulting in extreme weather in both areas
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15
What is unique about the muscles of the nektonic organisms in the epipelagic?
They have red myoglobin rich interior muscles that are kept warmer for long distance swimming and white outer muscles for bursts of speed.
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What happens in tropical regions where it doesnât cool, has a distinct thermocline and doesn't have a steady wind blowing?
limited mixing
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As a rule, most overturn occurs where? When is primary production the highest?
temperate and warmer polar latitudes, during the winter. however spring has the most primary production because that is when there is more sunlight
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Which epipelagic creatures undergo vertical migration and why?
Zooplankton daily leave the photic zone to deeper depths to escape predation.
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15
What is the Neritic zone?
epipelagic waters lying over the continental shelf
