Oceanography Exam
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Primary productivity - ANSWER ✅✅✅✅conversion of carbon dioxide into organic
matter (carbon compounds, usually sugar)
Productivity energy comes from either... - ANSWER ✅✅✅✅photosynthesis (solar
energy) or chemosynthesis (chemical)
Photosynthesis - ANSWER ✅✅✅✅generates the most biomass
Chemosynthesis - ANSWER ✅✅✅✅widespread in the ocean, including water column
and hydrothermal vents
-widespread on land such as at hot springs and in soil
What do plankton nets measure? - ANSWER ✅✅✅✅Plankton nets collect plankton
samples so scientists can see what types of plankton are present (phytoplankton and
zooplankton), but they do not show how active they are or their primary productivity
rates.
Why can't plankton nets measure primary productivity? - ANSWER ✅✅✅✅Because
they only capture organisms present in the water, not how fast they are
photosynthesizing or producing energy.
How is phytoplankton biomass estimated? - ANSWER ✅✅✅✅By measuring
chlorophyll, the green pigment used in photosynthesis
How do scientists measure chlorophyll in phytoplankton? - ANSWER ✅✅✅✅They trap
phytoplankton on filters, then use solvents to extract the chlorophyll and measure how
much is present.