Suppose a forest was heavily burned by a wildfire. Predict how the NEP of this forest would change over time.

Short Answer

Expert verified

The value or change in NEP (net ecosystem production) of the forest after a fire is determined by deducting the gross primary production (GPP) with cellular respiration (RT), and the result is the value of NEP.NEP=GPR-RT

During a forest fire, the GPP decreases from pre-fire levels, and cellular respiration increases due to increased decomposing activity by breaking the remains of trees and materials. Therefore, the NEP would decline during a forest fire.

Step by step solution

01

Forest

Forest is a zone in which the large tract of land is dominantly covered with trees. These regions have such a growth of dense trees based on the temperature and rain. This kind of forest ecosystem produces a higher range of photosynthesis.

02

Net Ecosystem Production (NEP)

The total biomass accumulation in a duration of time is measured with NEP. The Gross primary production (GPP) is the total primary production from all producers, which is subtracted with the cellular respiration (RT), and the NEP determines the measure of oxygen and carbon in the region.

03

NEP changes with the burning of fire in a forest

The NEP measures the amount of loss or gains in the oxygen and carbon in the ecosystem. When there is a forest fire, it decreases the producers' net production value, thereby increasing the activity of the decomposing organism.

Thus, there is an increase in the respiration rate, then it affects the NEP value to decrease, and the region becomes a carbon-rich zone.

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Most popular questions from this chapter

The Hubbard Brook watershed deforestation experiment yielded all of the following results except which of the following?

(A) Most minerals were recycled within a forest ecosystem.

(B) Calcium levels remained high in the soil of deforested areas.

(C) Deforestation increased water runoff.

(D) The nitrate concentration in waters draining the deforested area became dangerously high.

This dung beetle (genus Scarabaeus) is burying a ball of dung it has collected from a large mammalian herbivore in Kenya. Explain why this process is important for the cycling of nutrients and for primary production.

Why is the transfer of energy in an ecosystem referred to as energy flow, not energy cycling?

(a) Draw a simplified global water cycle showing ocean, land, atmosphere, and runoff from the land to the ocean. Label your drawing with these annual water fluxes:

  • ocean evaporation, 425 km3
  • ocean evaporation that returns to the ocean as precipitation, 385 km3
  • ocean evaporation that falls as precipitation on land, 40 km3
  • evapotranspiration from plants and soil that falls as precipitation on land, 70 km3
  • runoff to the oceans, 40 km3

(b) What is the ratio of ocean evaporation that falls as precipitation on land compared with runoff from land to the oceans? (c) How would this ratio change during an ice age, and why?

Nitrifying bacteria participate in the nitrogen cycle mainly by

(A) converting nitrogen gas to ammonia.

(B) releasing ammonium from organic compounds, thus

returning it to the soil.

(C) converting ammonium to nitrate, which plants absorb.

(D) incorporating nitrogen into amino acids and organic

compounds.

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