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How could you generate an estimate of total NPP from all producers in system like a lake, pond, or stream?
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- What is Primary Production and what are the factors that limit primary production in terrestrial and aquatic ecosystems. Give examples of where some of the most productive systems are on land and in water. Distinguish between Gross Primary Productivity and Net Primary ProductivityWhat is the difference between gross primary productivity and net primary productivity.http://www.fao.org/nr/water/aquastat/data/query/index.html?lang=en. Step 1. Choose five nations (including the United States) from the enormous database by clicking the corresponding boxes. For "select variables", choose these three: 1. Under "Water Resources" choose "Total Renewable Water Resources" and within that choose only "Total Renewable Water Resources per Capita. 2. Choose "Water Use" and then "Pressure on Water Resources" . Within that subset choose only"SDG 6.4.2 Water Stress". "SDG" means the Sustainable Development Goal. This value is the percentage of total available water that is used by a nation. 3. Under "Water Use" choose "Water Withdrawal by Sector", and within that choose only "Total Water Withdrawal per Capita". Nation Resources per Capita Withdrawal per Capita % Water Stress: withdrawal vs. resources) Step 2. Based…
- Of the following benefits, which one is the main potential benefit of water markets? Group of answer choices A. More water is available for lower-income households B. More water is available for agricultural uses C. Water is used for its most highly-valued purposes D.There will be no more water forgeryIf the area of a nature reserve is 6215 km2, and the carrying capacity of the area is 0.06 individuals per km2 , what is the carrying capacity of the whole nature reserve?what areas (lake, pond, stream) would you expect to have the highest rate of productivity? The lowest? Why?
- A group of researchers are assessing energy availability in a terrestrial ecosystem. The image shows the food web for this ecosystem. They set up three plots and assess the biomass of producers, primary consumers, and secondary consumers. Rabbits and grasshoppers feed on ground cover plants that grow on the forest floor. Plot 1 is composed of mature hardwood trees, and only 25% of the sunlight reaches the shrubs and grasses compared to plots 2 and 3, which have fewer trees and allow more sunlight to reach the forest floor. Based on the food web shown here, which of the following best describes how the reduction in sunlight to the forest floor would impact the number of primary consumers (squirrel, grasshopper, rabbit, and deer) in plot 1 compared to the other plots? A - Plot 1 will show an increase in deer only because they feed on trees. B - Plot 1 will show a decrease in squirrels and rabbits, while deer and grasshoppers will increase. C - Plot 1 will show a decrease in rabbits and…The information collected in St. Paul can be used to calculate the storage rate for each watershed, which is the difference between total input rates and total output rates: Storage Rate = Total Flux In Total Flux Out Q3.2. Use the information in the figure to fill out the table below. Enter a number into each box, then click "Check Answer" for feedback. Trout Brook Check Answer Total Flux In (Inputs) Total Flux Out (Outputs) - Storage Rate Rates for Nitrogen (kg ha-1 y-¹) 1 2 3 Note: To launch your computer's calculator, select Calculator from the CONTENTS menu (button in top left corner). For calculator help, click here. Deposition 14.5 N-Fixation 1.6 Pet Waste 5.9 Fertilizer 28.2 Compost 0.9 Nitrogen Budget Suburban Nitrogen Fluxes (kg ha-¹y-¹) Atmospheric Terrestrial Hydrologic E Denitrification 5.7 Street Sweeping 0.2 Yard Waste Removal 5.6 Storm Drain 9.9 Leaching to Groundwater 7.9 Nitrogen budget for the Trout Brook watershed in St. Paul. Adapted from Hobbie et al. (2017).Only about 10 percent of the energy from each level of an energy pyramid is available to the trophic level above it. (The rest is used to power life processes or is lost as heat .) If the primary producers have ,000 units of stored energy , how much energy would you expect to be transfered to first-level , second level , and third -level consumers ? Fill in the boxes with your answers.
- Construct a biomass pyramid for the following hypothetical scenario. Be sure to include all four trophic levels in the pyramid, and provide the total biomass of living things found at each level. Be sure to include units, and label each trophic level. The shape of your pyramid should be based on the biomass of each trophic level. Levels with more biomass should be drawn wider, and levels with less biomass should be drawn thinner. Note that your biomass pyramid may or may not be a true pyramid. Scenario: Hickory Run Nature Reserve is a 150-acre conservation area filled with plants and animals native to the Mid-Atlantic region of the United States. A baseline study was done to determine the total biomass of producers and consumers living on the reserve. Baseline data will be compared to data collected in future years to determine trends in species accumulation or loss. This comparison is important because the region surrounding the reserve is experiencing a high rate of human development…This conceptual model to the right shows the flow of energy through a spring ecosystem in Silver Springs, Florida from Figure 46.8 in your textbook. 7a. Which value/number on this diagram represents gross primary productivity (GPP)? Express using the units kcal/m?/yr. Sunlight 1,700,000 kcalim?lyr Primary producers 13,187 20,810 7,618 4,250 Primary consumers 7b. Which value/number represents net primary productivity (NPP)? Express using the units kcal/m?/yr. 2,265 3,368 1,103 720 Secondary consumers 272 383 111 90 7c. What accounts for the difference in GPP and NPP? Tertiary consumers 16 21 5 Decomposers 7d. What is the efficiency of energy transfer between the primary producers and the primary consumers? Is this more or less efficient than the transfer between a 5,060 5,060 Total heat and respiration 20,810 secondary consumer and tertiary consumer? Explain. respiration + heat to decomposersCreate a bar graph that ranks the given ecosystems from least productive to most productive. Title your graph, label each axis, label each bar, and provide units of measurement. Use the data in the table below showing net primary productivity of major ecosystems of the world: Ecosystem Net Primary Productivity (kcal/m2/yr) coniferous forests 3,500 deciduous forests 6,000 deserts 500 estuaries 9,000 freshwater ecosystems 2,000 grasslands 2,500 oceans 1,000 swamps 9,000 tropical rain forests 9,000 tundra 750