Unit 2: Primary Productivity

Question 1

How is solar energy a acquired and transferred by living organisms?

Answer 1

Producers take in solar energy and convert it to other forms of energy consumers can use.

Question 2

Productivity

Answer 2

The rate of energy production.

Question 3

Gross primary productivity (GPP)

Answer 3

The total amount of solar energy producers capture in a certain time.

Question 4

Net primary productivity (npp)

Answer 4

The energy producers capture minus the amount they respire.

Question 5

Productivity is measured in what unit?

Answer 5

Kg C/ m^2 / day

Question 6

What ecosystems have high primary productivity?

Answer 6

Ecosystems with lots of sunlight, water, nutrients, and warm temperatures.

Question 7

What ecosystems have a low primary productivity?

Answer 7

Colder regions, dry areas, and dark regions.

Question 8

What percent of solar energy that reaches an ecosystem is turned into chemical energy?

Answer 8

1%

Question 9

Normal range of NPP in an ecosystem

Answer 9

25-50%

Question 10

What is 60% of energy captured by producers used for?

Answer 10

Fueling its respiration.

Question 11

What is 40% of energy captured by producers used for?

Answer 11

Supporting its growth and reproduction.

Question 12

Equation for GPP

Answer 12

GPP = NPP + R

Question 13

NPP Equation

Answer 13

NPP = GPP - R

Question 14

Why do we care about primary productivity?

Answer 14

Tells us how much energy is available for the organisms in an ecosystem.

Question 15

Respiration rate equation

Answer 15

Initial DO - Dark DO / days

Question 16

Phycobiliprotiens

Answer 16

Organisms that absorb whatever light they can and turn it to red light.

Question 17

Chlorophyll require what color light?

Answer 17

Red

Question 18

Chomosynthesis

Answer 18

Organisms unable to get any light turn chemicals into organic compounds.