MarBiolPHYTO

Itisincreasingbecauseoffossilfuel burning

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Unformatted text preview: p water at night to take up nutrients Note their abundance in daylight (top) near the water’s surface. At Night they swim deep to take up nutrients Some dinoflagellates are toxic and some can bioluminesce. They are Some dinoflagellates are brightest during the “new” moon. Some tropical bays have large populations of dinoflagellates that reside there and light up the whole bay (i.e. Bahia Phosphorescente in Jamaica). They bioluminesce when they think they are being They bioluminesce when they think they are being attacked. The flash is intended to startle the predator. It is a defense mechanism. There are many other classes of phytoplankton, and not enough time There are many other classes of phytoplankton, and not enough time to cover all. One other major group are the coccolithophores. They have flagella plus cover their cells with elaborate plates made of calcium carbonate. The coccoliths are white and big blooms can be seen via satellites. The calcium carbonate plates can The calcium carbonate plates can have elaborate shapes • It is not known why they produce the plates The bright water west of Alaska is a The bright water west of Alaska is a summer bloom of coccolithophores In some places coccolithophore In some places coccolithophore sediments are very thick • The White Cliffs of Dover in England are deposits of coccoliths Blackboard chalk was...
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