What conditions produce an inverted pyramid of biomass in which the consumers have a greater biomass than the producers? Can you think of an example of an inverted pyramid of numbers in which there are, for example, more herbivores than plants on which they feed?
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What conditions produce an inverted pyramid of biomass in which the consumers have a greater biomass than the producers? Can you think of an example of an inverted pyramid of numbers in which there are, for example, more herbivores than plants on which they feed?
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- The maximum sustainable yield (MSY) is the highest rate at which a potentially renewable resource can be used indefinitely without reducing its available supply. The idea is to remove individuals while keeping the population at a constant growth rate and size, but to find the size where the harvest is maximized. The greater the growth rate, the more individuals you can remove and not change the population size. Where is the growth rate at its maximum? To find this look at your logistic model simulator. 1. Set up a hypothetical salmon population where the carrying capacity is 20,000 fish, the maximumr is 0.7. According the the maximum sustainable yield (MSY), at what population size should we maintain the salmon while fishing?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…Which of the following statements BEST describes energy transfer in an ecosystem? A. If the primary producer has 175,000 kcal available, the secondary consumer will receive 17,500 kcal from the primary consumer. B. If the primary consumer has 175,000 kcal available, the secondary consumer will receive 17,500 kcal from the primary consumer. C. If the primary consumer has 175,000 kcal available, the tertiary consumer will receive 175 kcal from the secondary consumer. D. If the primary producer has 175,000 kcal available, the tertiary consumer will receive 17,500 kcal from the secondary consumer.
- 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…A conceptual model representing the role, interaction, reaction, and density of essential ecosystem components is shown below. Examine the model and the relationships between the major players (i.e., predator, prey, producer). The structure's most important role is played by these major players. It's also worth noting that nutrition has been included in the model. This is the abiotic component that has a direct or indirect impact on the interaction. Question: Why does the organism’s interaction appear in an oscillating pattern? What does it suggest?Assume there are 1000 units of energy in the producer level of the energy pyramid. How many units of energy are available at each of the three consumer levels?
- Energy transferred from one trophic level to the next in an ecosystem is measured in calories, numbers, and in biomass. If a rangeland has a biomass of 100, 000g/m2 from the grass, how much biomass will be available in human beings who eat the cow that eat that grass?Which one of the following sentences is NOT true? Select one: Compared with other land-based food production systems, fisheries and aquaculture have a relatively small overall carbon footprint. Global fish production from capture and culture operations contributed up to 1.5% to the world’s CO2 emissions. CO2 emissions by marine and inland fishing vessels were about 0.5% of the total global emissions. Being a minor contributor in global terms, fisheries and aquaculture have no opportunities to mitigate emissions of greenhouse gases.A conceptual model representing the role, interaction, reaction, and density of essential ecosystem components is shown below. Examine the model and the relationships between the major players (i.e., predator, prey, producer). The structure's most important role is played by these major players. It's also worth noting that nutrition has been included in the model. This is the abiotic component that has a direct or indirect impact on the interaction. Question: Based on this scenario, what is the most significant role of sea otters in the marine community? Why it’s important?
- Lastly, notice the yellow graph for "Net Exports": in 2008 it was about +400, meaning the US exported 400 million gallons of biodiesel. But for the past several years "Net Exports" has been in negative territory, meaning that we IMPORT biodiesel from other countries! (this isn't surprising, notice that green consumption is consistently larger than blue production). The US first started importing biodiesel in the year U.S. Biodiesel Production, Exports, and Consumption Print Dow 2,500 • Production + Net Exports + Consumption 2,000 1,500 1,000 -500 -1,000 2001 Last updated October 2018 2004 2007 2010 2013 2016 Printed on: Aay 10 Millions gallonsThe growth of a population of natural resources (such as hardwood trees) over time is illustrated by the graph. Two significant pieces of information are included: the environment's carrying capacity and the maximum sustainable yield. The environment's carrying capacity is the point at which all available resources are being used by the organisms in the population, and the maximum sustainable yield is the point at which the highest number of the population are being harvested without impairing the populations' growth. (see pic.) Identify the assumptions about population growth that are implicit in the figure. (multiple answers can be chosen.) A) The environment's carrying capacity does not change over time due to any increase or decrease of resource availability. B) The population grows logistically until it nears the environment's carrying capacity and does not diverge from this rate over time. C) The maximum sustainable yield grows logistically until it reaches the…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 decomposers