Quick Answer: What best describes the net primary productivity of an ecosystem?

Which of the following best describes net primary productivity in an ecosystem? net primary productivity is the amount of energy lost through respiration by producers subtracted from gross primary productivity of an ecosystem.

How would you describe primary productivity?

Primary productivity is the process by which organisms make their own food from inorganic sources. … These organisms are known as autotrophs, since they can use inorganic substrates and solar energy to carry out metabolic processes and build cellular material.

What does net primary production mean?

In the process of making their own food, plants also provide the oxygen we need to breathe. … They show net primary productivity, which is how much carbon dioxide vegetation takes in during photosynthesis minus how much carbon dioxide the plants release during respiration (metabolizing sugars and starches for energy).

What is the definition of net primary production quizlet?

net primary production. the available energy in the form of organic material that is available for transfer to the next level of the food chain. This is equal to the gross primary productivity of an organism minus the energy used by that organism. niche. the role an organism has in an ecosystem.

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Which equation best represents net primary productivity?

The overall productivity of a system can be found in an equation where the Net Primary Production, or NPP, is equal to the Gross Primary Production, or GPP, minus the Respiration, or R. The formula is the NPP = GPP – R. The NPP is the overall efficiency of the plants in the ecosystem.

What is primary productivity in an ecosystem?

primary productivity, in ecology, the rate at which energy is converted to organic substances by photosynthetic producers (photoautotrophs), which obtain energy and nutrients by harnessing sunlight, and chemosynthetic producers (chemoautotrophs), which obtain chemical energy through oxidation.

How is primary productivity measured in an ecosystem?

Primary productivity can be measured from the amount of oxygen consumed by a volume of water in a fixed period of time; water for which productivity is to be determined is enclosed in sealed white and dark bottles (bottle painted dark so light would not enter).

What is net productivity in ecology?

The rate at which an ecosystem accumulates energy or biomass, excluding the energy it uses for the process of respiration. This typically corresponds to the rate of photosynthesis, minus respiration by the photosynthesizers.

What is net primary production in ecology?

Net primary production (NPP) is strictly defined as the difference between the energy fixed by autotrophs and their respiration, and it is most commonly equated to increments in biomass per unit of land surface and time. … At the regional scale, net primary production can be largely accounted for by climatic factors.

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What is net primary productivity in geography?

Net primary productivity (NPP) is defined as the net flux of carbon from the atmosphere into green plants per unit time. NPP refers to a rate process, i.e., the amount of vegetable matter produced (net primary production) per day, week, or year.

What is net primary productivity in AP environmental science?

Laboratory Investigations for AP Environmental Science. 2005 Introduction: Net primary productivity (NPP) is defined as the amount of carbon from the atmosphere that gets added to green plants per unit of time. It is a rate, the quantity of new vegetable matter added per day, per week or per year.

What is the primary productivity of an ecosystem quizlet?

The net primary productivity of an ecosystem is 1 kg C/m2/year, and the energy needed by the producers for their own respiration is 1.5 kg C/m2/year.

What is net primary productivity Why is it important quizlet?

Net primary productivity is the most important measurement because it represents the amount of chemical energy(glucose) that will be available to consumers in the ecosystem. Net primary productivity varies greatly from one ecosystem to another.