Primary producers

What simple sugar is produced by photosynthesis from Carbon Dioxide and Water?

Glucose

What is primary production?

The net accumulation of organic matter produced by autotrophs after their own respiration needs have been met.

How much organic carbon is produced by primary producers in marine ecosystems each year?

35 - 50 billion metric tons.

If 150 gC/m2/yr is produced annually in an area of the ocean, what mass of primary producers would have generated this 150 gC/m2/yr?

1500 g of primary producers. 150/0.10 gC​=1500 g total biomass, primary producers (like phytoplankton) are about 10% carbon by mass

90 - 96 % of the carbohydrate produced by primary production in the ocean comes from _______________________.

Phytoplankton

Organisms that are capable of actively swimming are termed ____________________.

Nekton

Permanent members of the plankton are termed _______________________.

Holoplankton

Temporary members of the plankton are termed ______________________.

Meroplankton

Which of the following statements about plankton nets is not correct.

They are good for collecting gelatinous organisms.

Which of the following plankton size categories contains viruses?

Femptoplankton

Which plankton size group contains organisms responsible for up to 80% of all photosynthetic activity in the open ocean?

Picoplankton

Which plankton size group contains organisms responsible for up to 80% of all photosynthetic activity in the open ocean?

Picoplankton

What is the name of the pathway that recycles leaked dissolved organic carbon back into the food web?

Microbial Loop

Which of the following groups are most abundant in seawater?

Viruses

Which group of phytoplankton are covered with a structure made of glass?

Diatoms

What strategy do diatoms use to offset the weight of the frustule?

They synthesize oil droplets that provide buoyancy.