Rising in the human population and declining plant species will impact adversely our basic needs. What are important resources will be hugely impacted and why?
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- Why don’t producers (plants) increase GPP in response to increasing CO2 in the atmosphere and thus reduce climate change? Group of answer choices Excess fertilizer from human activities reduces plant growth High concentrations of CO2 are toxic to plants CO2 concentrations are not increasing Consumers will just eat more plants if they grow faster CO2 is not the limiting nutrient for plantsThe limiting nutrient in an ecosystem is the nutrient; that is the most scarce nutrient that is needed for more growth to occur that is limited however is not needed by many organisms in the system is almost always carbon dioxide is almost always nitrogen gasWhich of the following statements about nutrient inputs and eutrophication is FALSE? O Fossil fuel combustion (e.g. burning gasoline, coal) releases nitrogen which contributes to eutrophication The production of chemical farm fertilizers through industrial fixation of N, is a major source of bioavailable nitrogen and cause of eutrophication O The mining of phosphate rock for fertilizers is a major source of bioavailable phosphorus and cause of eutrophication O Eutrophication can cause oxygen depletion in aquatic systems by increasing the growth of algae which consume a lot of oxygen The production of livestock at large-scale (which generates a lot of manure) can be a cause of eutrophication
- To reduce the risk of harm from a water transfer project, government subsidies for water should be avoided there should be no use of water for growing crops ecosystem needs do not need to be considered dams should be used O aqueducts should not be usedWhat forces would be working against an equitable distribution of our resources?in the soil decrease release CO₂ in primary producers primary consumers will occur increase absorb CO₂ from in the biomass will not occur will remove will not remove Nutrient export is likely to increase because most of the nutrients are stored further erosion of soil Trees the atmosphere, so removal of trees this carbon sink. Soil moisture will decline because evaporation from the clear-cut land will With the loss of the main plummet. and and structural components of the ecosystem, biodiversity will
- If you were to grow a Venus fly trap and provide it with a standard dose of chemical fertilizer, how would the abundance of traps change? Why? Increase because fertilizer helps plants grow larger Decrease because the plant doesn’t need traps to obtain these nutrients anymore Increase because now the plant will have an increased need for animals as food Decrease because the plant knows you will keep on fertilizing itFor each of the following actions, state one or moreof the three scientific principles of sustainabilitythat are involved: (a) recycling aluminum cans;(b) using a rake instead of a leaf blower; (c) walkingor bicycling to class instead of driving; (d) taking yourown reusable bags to a store to carry your purchaseshome; and (e) volunteering to help restore a prairieor other degraded ecosystem.How is integrated pest management (IPM) different from other forms of pest control? O IPM only supports mechanical control of pests in an area. O IPM tolerates a low number of pests in an area. O IPM favors the generation of herbicide-resistant weeds. O IPM prohibits the use of herbicides in an area. O IPM suggests the use of herbicide-resistant plants.
- Do you think the human species can continue raising itsglobal carrying capacity? Why or why not? Do you thinkwe should try to keep raising our carrying capacity? Whyor why not?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 timeFox Mountain Lion Snake Hawk Frog Robin Deer Grasshopper Rabbit Caterpillar Grass Tree In this ecosystem, hunting for deer has become a common practice among many residents of nearby communities. If hunting continues and drastically reduces the deer population, how might this impact the hawk population? Hawks do not rely on deer for food, so the hawk population would be unaffected. Having less deer would increase the mountain lion dependency on rabbits, which would lead to fewer rabbits available for the hawks. Having less deer would affect the trees in the ecosystem leading to fewer nesting sites for the hawks. Having less deer would increase the rabbit population providing additional food for the hawks and increase the hawk population.
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