Ecosystem Energy Calculations

In a forest ecosystem, the total amount of energy captured by photosynthesis is 6000 kcal/m²/year. If the plants use 2000 kcal/m²/year for their metabolic processes (respiration), calculate the NPP.

• A) 4000 kcal/m²/year

• B) 5000 kcal/m²/year

• C) 6000 kcal/m²/year

• D) 2000 kcal/m²/year

Tags

NGSS.HS-LS2-4

A lake ecosystem has a NPP of 2000 kcal/m²/year and the respiration is measured to be 800 kcal/m²/year. Calculate the GPP for this ecosystem.

• A) 1200 kcal/m²/year

• B) 2800 kcal/m²/year

• C) 2000 kcal/m²/year

• D) 800 kcal/m²/year

Tags

NGSS.HS-LS2-4

In a grassland ecosystem, the GPP is 9.56 kcal/m²/day, and the NPP is 7.40 kcal/m²/day. About how much energy is being used for respiration by the plants in this ecosystem annually?

• A) 788 kcal/m²/year

• B) 6218 kcal/m²/year

• C) 3556 kcal/m²/year

• D) 2700 kcal/m²/year

Tags

NGSS.HS-LS2-3

NGSS.HS-LS2-4

A wetland ecosystem captures 6000 kcal/m²/year through GPP. If 2400 kcal/m²/year is used in respiration, what is the NPP?

• A) 3600 kcal/m²/year

• B) 8400 kcal/m²/year

• C) 6000 kcal/m²/year

• D) 2400 kcal/m²/year

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

A desert ecosystem has a NPP of 500 kcal/m²/year and the GPP is measured to be 1200 kcal/m²/year. Calculate the energy used for respiration.

• A) 700 kcal/m²/year

• B) 1700 kcal/m²/year

• C) 500 kcal/m²/year

• D) 1200 kcal/m²/year

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-4

In a marine ecosystem, the NPP is found to be 4000 kcal/m²/year, and the respiration rate is 1500 kcal/m²/year. Calculate the GPP.

• A) 2500 kcal/m²/year

• B) 5500 kcal/m²/year

• C) 4000 kcal/m²/year

• D) 1500 kcal/m²/year

Tags

NGSS.HS-LS2-4

Annually, an agricultural field ecosystem has a GPP of 7000 kcal/m². If the NPP is about 12.33 kcal/m²/day, how much energy is spent on respiration by the plants?

• A) 2500 kcal/m²/year

• B) 11500 kcal/m²/year

• C) 7000 kcal/m²/year

• D) 4500 kcal/m²/year

Tags

NGSS.HS-LS1-7

NGSS.HS-LS2-4

A tropical rainforest has a NPP of 8000 kcal/m²/year. If the GPP is 11,000 kcal/m²/year, calculate the respiration for this ecosystem.

• 3000 kcal/m²/year

• 19000 kcal/m²/year

• 11000 kcal/m²/year

• 8000 kcal/m²/year

Tags

NGSS.HS-LS2-4

In an estuary ecosystem, the respiration rate is measured at 2000 kcal/m²/year, and the GPP is calculated to be 6000 kcal/m²/year. Find the NPP.

• 4000 kcal/m²/year

• 8000 kcal/m²/year

• 2000 kcal/m²/year

• 6000 kcal/m²/year

Tags

NGSS.HS-LS2-3

NGSS.HS-LS2-4

A tundra ecosystem has a NPP of 350 kcal/m²/year and the respiration is 650 kcal/m²/year. What is the GPP of the tundra ecosystem?

• A) 1000 kcal/m²/year

• B) 300 kcal/m²/year

• C) 650 kcal/m²/year

• D) 350 kcal/m²/year

Tags

NGSS.HS-LS2-4