Exam 12: The Plankton, Productivity, and Food Webs

The coccoliths on the outside of coccolithophores are made of silica.

Comb jelly is another name for jellyfish.

Zooplankton in the deep scattering layer (DSL) ________.

Although light, nitrogen, and phosphorous are abundant in the Pacific and Southern Oceans, the plankton are less abundant due to ________.

One of the most abundant groups of microorganisms on the planet is ________.

In HNLC regions, phytoplankton blooms are typically most limited by ________.

Some phytoplankton species migrate as much as 500 m vertically every day.

If the net primary production in a region is continually consumed by herbivores, the standing stock ________.

Rates of primary productivity in the open ocean are about the same as ________.

The shorter food chains of coastal and upwelling areas generally are more efficient than longer open-ocean food chains.

The only zone of the ocean with sufficient light for photosynthesis is the ________.

If the rate of uptake of dissolved inorganic carbon by phytoplankton is measured, the rate of production of organic matter can be calculated.

Organisms that float, but cannot swim against the tides and waves, are known as ________.

When centric diatoms reproduce by simple cell division, the two new daughter cells are ________.

An increase in the chlorophyll a content of a seawater sample with time yields a measurement of ________.

Chlorophyll a absorbs energy mostly in the blue and red wavelengths.

Net plankton are larger than nannoplankton.

At midlatitudes in spring, a phytoplankton bloom is often preceded by ________.

In grams of carbon per square meter per day, the open-ocean environment is as productive as a tropical rainforest.

At higher and higher trophic levels, there are usually ________ and ________ animals.