11. An increase in one trait usually leads to a decrease in another. For example, if a species puts a lot of effort into reproduction in one year, it usually cannot put a lot of energy into growth that year. This example describes a: density-independent population. trade-off. survivorship curve. sampling error.

11. An increase in one trait usually leads to a decrease in another. For example, if a species puts a lot of effort into reproduction in one year, it usually cannot put a lot of energy into growth that year. This example describes a: density-independent population. trade-off. survivorship curve. sampling error.

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter45: Population And Community Ecology

Section: Chapter Questions

Problem 3VCQ: Figure 45.16 Age structure diagrams for rapidly growing, slow growing, and stable populations are...

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7. An 'overshoot' in a population occurs when * the mortality of the population exceeds the natality. O the replenished resources in an ecosystem equals the natality. the natality of the population does not decrease with respect to the replenished resources. O the ecosystem is damaged or destroyed. 8. Which of the following is most likely to occur if there is an 'overshoot' in a population? * O Rate of immigration of individuals increases. O Competition occurs and there is a rapid decrease in the population. The ecosystem will collapse because of the limited resources. The species will be endangered.
9. Which of the following increases the population of certain species? * immigration emigration water availability predation 10. In a population of 1145 rabbits, how many years would it take to double their size given that their growth rate is 13.8% annually? * 158 years 50 years 5 years O half year 11. Which of the following is TRUE about the growth rate of a population? * Growth rate is negative if natality exceeds mortality. Growth rate is positive if mortality exceeds natality. There is an increase in the growth rate if emigration occurs. O The higher the female population, the higher the growth rate.
Figure 45.16 Age structure diagrams for rapidly growing, slow growing, and stable populations are shown in stages 1 through 3. What type of population change do you think stage 4 represents?
2. What is the generation time, net reproductive rate, and intrinsic rate of increase? 3. Plot the change in population size over time (for 10 years) starting with 10 individuals. 4. What would the female population size be in 25 years? 5. If hares were an endangered species, what other kinds of information would you need to gather to support your predictions made in 3 and 4?
I need help with a biology question, When we say that an individual organism has a greater fitness than another individual, we specifically measure the fitness quotient of that organism if it: lives longer than others of its species. competes for resources more successfully than others of its species. mates more frequently than others of its species. utilizes resources more efficiently than other species occupying similar niches. 5. leaves more viable offspring than others of its species. 1, 3 & 4 1, 2 & 5 1, 3 & 5 1, 2 & 3
1. How does the study of population ecology help us understand why some populations grow, some remain stable, and others decline? 2. The growth rates of various populations are usually expressed in percentages. Why are percentages advantageous in comparing growth rates? 3. The human population has grown as we have increased our global carrying capacity. In your opinion, can the global carrying capacity continue to increase? Explain your answer. 4. Why has human population growth, which increased exponentially for centuries, started to decline in the past few decades? 5. Malthus originally suggested that the population of England would collapse because it could not continue to increase its production of food. Why did this not happen?
1. Hunting is one way of reducing population size. Wildlife managers closely watch changes in population numbers of all wildlife species in order to determine legal hunting ‘bag limits’ for each hunter. Depending on changes in population size, hunting bag limits are changed from year to year. In each of the following scenarios, suggest what changes might have occurred in the population in the previous year to warrant these changes in bag limits. (Address all four factors that affect population size.) a.) The mallard duck bag limit has increased from four ducks/day to eight ducks/day. b.) The previous year 1 female black bear could be taken, and up to 3 males could be taken. This year no females can be taken.
The ecologist Richard Levins realized that metapopulation dynamics amongst subpopulations are analogous to logistic growth for individuals within a single population. 12 The analogy is summarized in this table: Logistic Growth Metapopulation Dynamics Unit of interest: Patches in a region that can host subpopulations Individuals in a population Model Proportion of patches that are describes Number of individuals, N change in: occupied, P All patches being occupied, P = 1 Limit to Carrying capacity, K growth: Q4.7. If 6 out of 10 patches have salamanders in them, what is the patch occupancy, P ?
Please present an example of your own that demonstrates the founder effect. Your example must include the following: 1. The organisms you use must be birds 2. You must include the size of the population(s) 3. You must include the effect on alleles (increase or decrease) in the population
10. Effective population size refers to the number of individuals which can participate in the reproduction process. Which of the following proportions of individuals would bring about the highest effective population size? 20 females and 80 males 70 females and 30 males 45 females and 55 males 35 females and 65 males
2. In a population, which individuals are most likely to survive and reproduce? * The individuals who are best adapted to the environment The individuals who grow the most rapidly. No answer The individuals who can catch the most prey The largest individuals in the group
116 2. In 1919 a researcher by the name of Dahl wanted to estimate the number of trout in a Norwegian lake. The trout were subject to fishing so it was important to know how big the population was in order to manage the fish stock. He captured and marked 109 trout in his first sample. A few days later, he caught 177 trout in his second sample, of which 57 were marked. Use the Lincoln index (on the previous page) to estimate the total population size: Size of first sample: Size of second sample: Number marked in second sample: Estimated total population: 3. Discuss some of the problems with the mark and recapture method if the second sampling is: Left too long a time before being repeated: (b) Too soon after the first sampling: 4. Describe two important assumptions being made in this method of sampling, which would cause the method to fail if they were not true: (a) (b) 5. Some types of animal would be unsuitable for this method of population estimation (i.e. would not work). (a) Name…