Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Textbook Question
Chapter 59, Problem 2CQ
Why does maximum sustainable yield occur at the midpoint of the logistic curve and not where the population is at
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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?
Why do some species tend to grow exponentially while others tend to follow a logistic growth model?
What type of ecological pyramid would be obtained from 120g secondary consumers, 60g primary consumers and 10g primary producers ?
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- If 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?arrow_forwardHow could you generate an estimate of total NPP from all producers in system like a lake, pond, or stream?arrow_forwardIn a community that has 4 trophic levels, what biomass of primary producers is necessary to maintain a tertiary consumer biomass of 1.78 kg/m^2? * a) 178 kg/m^2 b) 17800 kg/m^2 c) 1780 kg/m^2 d) 17.80 kg/m^2arrow_forward
- A population of 200 bass released in a lake began growing at a rate of 100 fish/yr. A second assessment performed at a later date found that there were 400 fish and the population was growing at a rate of 160 fish/yr. (Assume logistic growth dynamics.) Estimate the maximum sustainable yield (MSY) from the population.arrow_forwardWhy is "carrying capacity" an important parameter for a healthy ecosystem?arrow_forwardThe gross primary productivity is 100 g/m2/year and the respiration rate is 57 g/m2/year . If the standing crop (of plants) in the above question is 145 g/m2 what will the standing crop (of plants) be a year later, assuming no death/predation? Group of answer choices can't tell from the information given a. 188 g/m2 b. 145 g/m2 c. 245 g/m2 d. 182 g/m2arrow_forward
- What is the typical shape ofa population growth curve?How can the biotic potentialbe represented in the sameway graphically?arrow_forwardIn the land between the lakes, Elk and Bison Prairie, we currently have 125 bison and 15 elk. These species are known to compete for some but not all of their resources. We are able to determine that the carrying capacity of the bison K1 is 200 and that the alpha (competition coefficient) is 4. The carrying capacity for Elk (K2) is 100 and the beta (competition coefficient) is 1.arrow_forwardWhy does the growth curve line become flat after initially increasing? The population growth rate has slowed. The population growth rate has increased. The population has reached maximum sustainable yield. The population is experiencing density-independent growth.arrow_forward
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