O O O In an aquatic ecosystem, 20,000 kcal / m² / year was absorbed by producers through the process of photosynthesis. If the NPP was 8,000 kcal / m² /year, how much energy was lost to respiration? * 28,000 kcal /m2 / year 16,000 kcal/m2 / year O40,000 kcal/m2 / year 12,000 kcal / m² / year GPP is defined as the amount of solar energy absorbed by producers minus the energy lost through respiration the amount of energy lost as heat between trophic levels O the amount of solar energy lost as heat from producers the amount of solar energy absorbed by producers through photosynthesis The main product of photosynthesis is FI0 F7 FB F5
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- estimate the total primary production in the oceans (in million metric tons carbon) using the following information - 92% of oceans are open ocen with an average productivity of 125 gC/m2/yr - 8% of the oceans are coastal, with an average productivity of 2,000 gC/m2/yr - remember a metric ton is 1,000 KgA family travels from New York City to Costa Rica three times a year for a vacation. The family would like to purchase some forested land in the Catskills, keeping the trees intact as an offset to the carbon dioxide they produce travelling each year. How much forest must they purchase? Use the following assumptions to measure the carbon offset provided by this intact forest. • The biomass of the forest increases at an annual rate of 2.8 × 105 kg/ha. • The forest biomass is 45% carbon by mass. • There are four people in the family. • 0.2 kg of CO2 is produced each mile per person on the flight. • The round-trip distance is 4,500 miles. • There are 2.47 acres in one hectare. 1. Calculate the mass of carbon, in kilograms, that is accumulated and stored in 1.0 ha of this forest in one year. 2. Calculate the mass of carbon, in kilograms, that is emitted by the family as a result of their round-trip flights to Costa Rica each year. 3. Calculate the number of acres of forest that must be…Approximately how many kilograms (kg) of carnivore (secondary consumer) biomass can be supported by an area of a field containing 100 kg of plant material (assuming 10% efficiency in energy transfer)? O 10 O 100 O 1 O 1,000
- Which of the following statements about gross primary production (GPP) is FALSE? O It is a rate that can be positive or negative Some forests (e.g. temperate forests) become carbon sources in the winter because GPP is less than respiration One method to estimate GPP is to monitor the change in CO, concentration, because CO2 is consumed during photosynthesis O It is the amount of photosynthesis per unit time O It is the amount of solar energy converted into chemical energy per unit timeAP Environmental Science Primary Productivity Problems Net Primary Productivity efficiency can be calculated for terrestrial producers when values for insolation energy, respiration loss and gross productivity are known. Use the equations below to answer the following problems: Net Primary Productivity = Gross Productivity – Respiration Loss Efficiency = . NPP . X 100 Insolation Energy In a rice paddy in Southeast Asia, the insolation energy is 6,000,000 calories/m2/day. The gross productivity of the rice is 0.012 grams/cm2/day, and the respiration loss is 20 percent. One gram of rice is equivalent to 1000 calories. Calculate the net primary productivity of the rice. Find the efficiency of photosynthesis by the rice. Could you mostly help me set it up and find it? So I can learn how to do it.WRITE ABOUT A THEME: Energy and MatterDecomposition typically occurs quickly in moist tropicalforests. However, waterlogging in the soil of some moisttropical forests results over time in a buildup of organicmatter called “peat.” In a short essay (100–150 words), discussthe relationship of net primary production, net ecosystemproduction, and decomposition for such an ecosystem. AreNPP and NEP likely to be positive? What do you think wouldhappen to NEP if a landowner drained the water from atropical peatland, exposing the organic matter to air?
- A family travels from New York City to Costa Rica three times a year for a vacation. The family would like to purchase some forested land in the Catskills, keeping the trees intact as an offset to the carbon dioxide they produce travelling each year. How much forest must they purchase? Use the following assumptions to measure the carbon offset provided by this intact forest. The biomass of the forest increases at an annual rate of 2.8 × 105 kg/ha. The forest biomass is 45% carbon by mass. There are four people in the family. 2 kg of CO2 is produced each mile per person on the flight. The round-trip distance is 4,500 miles. There are 2.47 acres in one hectare. Calculate the mass of carbon, in kilograms, that is accumulated and stored in 1.0 ha of this forest in one year. Show your work. Calculate the mass of carbon, in kilograms, that is emitted by the family as a result of their round-trip flights to Costa Rica each year. Show your work. Calculate the number of acres of forest…Figure 46.8 Why do you think the value for gross productivity of the primary producers is the same as the value for totall heat and respiration (20,810 kcal/ m2/yr)?(2) Name the human activity that is responsible for the greatest change to the amount of carbon (3) Explain how farming cattle to provide meat and milk may change the amount of carbon in 7.3 The carbon cycle available for cycling. buning of fossil fuels such as coal, oil anel aas 3 the atmosphere. Analyse the information proided about how human activity changes the carbon cyele o the diagram of the carbon cycle below: (a) colour in red the arrows that represent movements of carbon that would be increasendi human activity (b) colour in blue the arrows that represent movements of carbon that would be reduced be human activity Scarbon dioxide in air burning of fossil fuels for vehicles, electricity and heat burning of forests, fuel wood and organic debris photosynthesis A carbon stored in plant tissue terrestrial food chains carbon stored in animal tissue respiration < /decompoOsers coal wastes, dead organisms Tme photosynthesis (aquatic food chains) ol and gas time ----- - formation of…
- When a fossil fuel reserves decreases, the cost of fossil fuel energy will be more affordable for most people . Why is this an unlikely scenario?Given the irreversibility of burning up fossil fuel Reserve, what steps should we take to promote energy conservation? Should energy be taxed at a high rate? Should we assume that natural gas and other energy sources will become available as they are needed?Interpreting Data In a classic study, John Teal measured energy flow in a salt marsh ecosystem. The table below shows some of his results. Form of energy Kcal/m?/yr Efficiency of energy transfer (%) Sunlight 600,000 n/a Chemical energy in producers Chemical energy in primary consumers 6,585 81 Data from: J. M. Teal, Energy Flow in the Salt Marsh Ecosystem of Georgia. Ecology 43: 614-24 (1962). a. Calculate the efficiency of energy transfer by the producers. That is, what percentage of the energy in sunlight was converted into chemical energy and incorporated into plant biomass? b. Calculate the efficiency of energy transfer by the primary consumers. What percentage of the energy in plant biomass was incorporated into the bodies of the primary consumers? What became of the rest of the energy? c. How much energy is available for secondary consumers? Based on the efficiency of energy transfer by primary consumers, estimate how much energy will be available to tertiary consumers. d. Draw a…