Why Might the Abundance of Marine Diatoms Be Related to Increased

question 30

Multiple Choice

Why might the abundance of marine diatoms be related to increased volcanism?

• A)Volcanic activity resulted in decreased sunlight, which affected the growth of all marine phytoplankton except diatoms.
• B)Volcanic activity may have resulted in the increase in silica in seawater.
• C)Increased volcanic activity warmed sea water, creating a favorable habitat for diatoms.
• D)Increased volcanism caused cooling of sea water, which created optimal conditions for diatom growth.
• E)Increased volcanism created new ecological habitats for diatoms.

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