what is the relationship between net primary productivity and gross primary productivity?
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Gross primary production (GPP) is the total rate at which material is produced and net primary production (NPP) is the rate at which material is accumulated in excess of respiration. In other words, NPP is GPP minus respiration.
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The cycle of energy is based on the flow of energy through different trophic levels in an ecosystem. ... At the first trophic level, primary producers use solar energy to produce organic material through photosynthesis. The herbivores at the second trophic level, use the plants as food which gives them energy.
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Net profit reflects the amount of money you are left with after having paid all your allowable business expenses, while gross profit is the amount of money you are left with after deducting the cost of goods sold from revenue.
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C6H12O6 + 6O2 → 6CO2 + 6H2O + energy (ATPs + heat) Page 3 Experiment B-10 Photosynthesis Ver 3.2.7 3 The rate of photosynthesis can be expressed as either gross or net rates. Gross photosynthesis is the total rate of carbon fixation (reduction of CO2) without considering that some of the CO2 is lost in respiration.
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Written out, the equation for calculating GDP is: GDP = private consumption + gross investment + government investment + government spending + (exports – imports). For the gross domestic product, “gross” means that the GDP measures production regardless of the various uses to which the product can be put.
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Gross profit is your company's profit before subtracting expenses. Net profit is your business's revenue after subtracting all operating, interest, and tax expenses, in addition to deducting your COGS.
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Answer and Explanation: Gross production is the total amount a producer makes of their product while net production tells us what that number means in the context of all the...
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Deforestation and Greenhouse Gases. Human activities produce large amounts of greenhouse gases (GHGs), primarily carbon dioxide (CO2), and thus contribute to global warming. The use of fossil fuels is the primary source of CO2 emissions, but the removal of trees from forested land has also contributed.
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First, the input of more labour increases productivity (Malthus 1798, p. 11), subject to the constraints of finite resources and diminishing returns. However, whereas Malthus focuses on extensive productivity increases, Boserup (1965) highlights the intensification component of productivity increases.
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GNP: An Overview. Gross domestic product (GDP) is the value of a nation's finished domestic goods and services during a specific time period. A related but different metric, the gross national product (GNP), is the value of all finished goods and services owned by a country's residents over a period of time.
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Gross income is the revenue generated from a business's sales or an individual's labor. Net income is the profit made from that revenue when total expenses are taken out. For an individual, gross income is simply what your salary is while net income is what you actually take home in your paycheck.
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National accounts Thus gross value added is equal to net output. Net value added is obtained by deducting consumption of fixed capital (or depreciation charges) from gross value added. Net value added therefore equals gross wages, pre-tax profits net of depreciation, and indirect taxes less subsidies.
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GDP vs. GNP: An Overview. Gross domestic product (GDP) is the value of a nation's finished domestic goods and services during a specific time period. A related but different metric, the gross national product (GNP), is the value of all finished goods and services owned by a country's residents over a period of time.
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At the global scale, the productivity of terrestrial vegetation decreases from the equator to the poles, and species richness is positively correlated with productivity.
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Measuring productivity growth. Measured productivity is the ratio of a measure of total outputs to a measure of inputs used in the production of goods and services. Productivity growth is estimated by subtracting the growth in inputs from the growth in output — it is the residual.
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In ecology, productivity refers to the rate of generation of biomass in an ecosystem. ... Productivity of autotrophs such as plants is called primary productivity, while that of heterotrophs such as animals is called secondary productivity.
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Primary productivity is the process resulting from photosynthetic activity of the plants and determines biomass accumulation in forests. Net primary productivity (NPP) represents the difference between gross photosynthesis of plant foliage and energy losses due to respiration and mortality of plant tissues.