Analyzing ecological footprints reveals that
(A) Earth's
(B) current demand by industrialized countries for resources is much smaller than the ecological footprint of those countries.
(C) it is not possible for technological improvements to increase Earth's carrying capacity for humans.
(D) the ecological footprint of the United States is large because per capita resource use is high.
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- How does the ecological impact from a diet consisting strictly of animal products (e.g., dairy products, eggs, and meat) compare with that of a strictly vegetarian diet? How many additional ecologically equivalent Calories do you consume each day by including as little as 10% of your Calories from animal sources?arrow_forwardExplain the effects on the ecosystem if Wood rat were removed. Provide both positive (if any) and negative impacts on the ecosystem. Be sure and include as many of the following terms in your writing as possible: autotroph, heterotroph, producer, primary consumer, secondary consumer, tertiary consumer, carnivore, omnivore, herbivore, energy, population, increase, and decrease.arrow_forwardWhich trophic level in an aquatic ecosystem would contain the greatest amount of usable energy? Primary consumers located 150 meters below sea level. Primary producers located 80 meters below sea level. Primary producers located 45 meters below sea level. Primary consumers located 40 meters below sea level.arrow_forward
- In a food web, the numbers of each organism typically exist in a relatively stable proportion. If an oilspill killed a large amount of zooplankton, what would be the next thing that would happen?A The number of tiger sharks would decrease.B The number of phytoplankton would increase.C The number of clams, mackerels, and jellyfish would decrease.D The number of herring, whelk, squids, and loggerhead turtles would increase.arrow_forwardAssume the following strict trophic chain: mountain lions eat deer; deer eat black oak seedlings; lizards eat bugs, spiders eat bugs; bugs eat black oak seedlings. Which of the following statements is true? (choose one) A. The mountain lion is a tertiary consumer B. The deer is a secondary consumer C. The spiders are secondary consumers D. The lizards are primary consumersarrow_forwardFresh water will be the most limiting factor for where human populations can live in the next 50 years. Why?arrow_forward
- Food Web Construction Directions: Construct a food web using the following organisms (grass,leaves,owl, snake,grasshopper,hawk,bird,caterpillar,rabbit) Use Words to Construct. And answer the question that follow 1What is/are the producer(s) in the food web? 2What organism(s) feed directly on plants? 3What is/are the secondary consumer(s) in the food web? 4What is/are the tertiary consumer(s) in the food web?arrow_forwardIn terms of trophic levels and energy, why do you suppose that there are not many top predators around?arrow_forwardWhat is the significance of primary consumers (consumers that feed on autotrophs, like herbivores) to the community?arrow_forward
- why do we need many more producers and fewer carnivores in a food web?arrow_forwardFrom the statistics you’ve seen, do you think marine food sources will keep up with human population growth?arrow_forwardAnalyzing ecological footprints reveals that(A) Earth’s carrying capacity would increase if per capita meatconsumption increased.(B) current demand by industrialized countries for resourcesis much smaller than the ecological footprint of thosecountries.(C) it is not possible for technological improvements toincrease Earth’s carrying capacity for humans.(D) the ecological footprint of the United States is large becauseper capita resource use is high.arrow_forward