Concept explainers
Population _______________ is the number of individuals of a species per unit of habitat area or volume at a given time. (a) dispersion (b) density (c) survivorship (d) age structure (e) demographics
Introduction: The study of change in population is termed as population dynamics. Population ecology can be defined as both the number of individuals for a particular species in an area and dynamics of the population. It is the study of interaction of population with the environment, such as competition of individuals for food and other resources.
Answer to Problem 1TYU
Correct answer: At a given time, the number of individuals of a species per unit of habitat area is described as population density.
Hence, the correct answer is option (b).
Explanation of Solution
Reason for the correct answer:
The population density of a particular area refers to as the number of individuals of a species per unit volume or habitat area at a particular time. Population density varies according to the time of year and type of the environment. Population density of an area can also vary according to the different season.
Option (b) is given as “density”.
The number of individuals of a species per unit habitat volume at a given time is known as population density. Hence, option (b) is correct.
Reasons for incorrect answers:
Option (a) is given as “dispersion”.
Population dispersion is described as the movement of individuals from one population to another population. It shows the migration rate of a population. Hence, option (a) is incorrect.
Option (c) is given as “survivorship”.
Survivorship gives the probability about the survival of an individual at a certain age. It does not tell about the number of individuals per unit volume. Hence, option (c) is incorrect.
Option (d) is given as “age structure”.
Age structure is the proportion of individuals at each age; therefore, it does not tell about the number of individuals per unit habitat area. Hence, option (d) is incorrect.
Option (e) is given as “demographics”.
Population demographics are statistics related to human population and does not tell about the number of individuals of a species per unit volume at a given time. Hence, option (e) is incorrect.
Hence, options (a), (c), (d), and (e) are incorrect.
The total number of individuals of a specific species per unit habitat area at a given time is described as the population density of that species.
Want to see more full solutions like this?
Chapter 53 Solutions
Biology (MindTap Course List)
Additional Science Textbook Solutions
Campbell Essential Biology (7th Edition)
Biology: Life on Earth
HUMAN ANATOMY
Microbiology: Principles and Explorations
- Question 1 ___________ competition occurs when one species reduces the resource available to the other. __________ competition occurs when one species reduces access to the resource. Question 2 Which of the following is not characteristic of interspecific competition? Question 2 options: A) Two or more species interact. B) The population size of at least one species decreases. C) The limiting resource does not change over time. D) One or more resources is limiting. Question 9 In a type II functional response ____________. Question 9 options: A) as handling time decreases, consumption also decreases. B) consumption is limited by handling time at very high prey density. C) as search time increases, consumption also increases.…arrow_forwardQuestion 7 Optimal foraging theory suggests that ____________. Question 7 options: A) when handling time is long relative to search time, predators should be generalists. B) specialized diets are rare in nature. C) new items are added to the diet only if their handling time is larger than average. D) when search time is long relative to handling time, predators should be generalists. Question 8 Question 8 options: In _____________, one species benefits while the other is unaffected. In ___________, both species benefit. Question 9 In a type II functional response ____________. Question 9 options: A) as handling time decreases, consumption also decreases. B) consumption is limited by handling time at very high prey density. C) as search time increases,…arrow_forwardA/An ____________ is an ecological relationship where one party benefits and the other is unaffected.arrow_forward
- Question 7 Optimal foraging theory suggests that ____________. Question 7 options: A) when handling time is long relative to search time, predators should be generalists. B) specialized diets are rare in nature. C) new items are added to the diet only if their handling time is larger than average. D) when search time is long relative to handling time, predators should be generalists.arrow_forwardMule Deer Use the passage to answer the question. This image shows a male mule deer (Odocoileus hemionus), which is native to western North America. Named for their large ears, mule deer are hunted for sport and food under strict management practices, such as designated hunting seasons and limits on how many deer a hunter can take. A) In a short paragraph, propose a hypothesis to test the effect of a zoned reserve on mule deer populations. Justify your hypothesis based on your knowledge of zoned reserves. B) In 1-2 short paragraphs, outline a field experiment to test your hypothesis on the effect of a zoned reserve on mule deer populations. Describe your control group, experimental group, and the data you would collect. Identify at least two environmental factors that could affect your data collection and how you would address them, if possible.arrow_forwardNOTE: The image you need to see in order to answer this question is attachedA developer owns the property encompassing the three habitats above. By law, one of the habitats must be left intact to satisfy the zoning laws. The developer works with an environmental engineer to choose which of the habitats should be saved. The environmental engineer suggests that Site C should be saved. Which of the following choices best justifies this decision?Responses A) Site C has greater species richness and species evenness than either Site A or Site B. This will promote the maximum sustainability for future generations of animals. B) Site C is tied with Site A for greatest species richness, but unlike Site A, it has representative species from all 3 of the sites within it. C) Site C not only contains the greatest number of species, it also has the greatest genetic diversity within each species. D) Site C has more unique species in it than either Site A or Site Barrow_forward
- The term ___________ is used to identify important locations on the planet for conservation efforts.arrow_forwardQuestion 1 Question 1 options: ___________ competition occurs when one species reduces the resource available to the other. __________ competition occurs when one species reduces access to the resource. Question 2 Which of the following is not characteristic of interspecific competition? Question 2 options: A) Two or more species interact. B) The population size of at least one species decreases. C) The limiting resource does not change over time. D) One or more resources is limiting. Question 3 Which of the following does not directly affect the intensity of competition? Question 3 options: A) Niche overlap. B) Niche breadth. C) The density of competitors. D) The presence of similar species.arrow_forwardRead the article given below and answer the questions that follow: Recent increases in populations of seabirds that were depleted severely during the middle of the twentieth century demonstrate the efficacy of conservation strategies that work within the context of local culture. Along the North Shore of the Gulf of St. Lawrence in Quebec, Canada, direct exploitation and disturbance of breeding seabirds caused severe declines for several species between 1955 and 1978, including 84 percent and 76 percent declines for Razorbill and Atlantic Puffin, respectively. Significant reductions also occurred for populations of Common Eider (Somateria molissima), Common Murre (Uria aalge), and Black Guillemot (Cyphus grylle). Research by the Quebec-Labrador Foundation, a nonprofit conservation organization, into root causes of the population declines along a 400-km stretch of coast revealed conflicts between conventional enforcement of migratory bird regulations and cultural norms. A household…arrow_forward
- The population of salmon in Lake Maria has remained constant, at around 2,000 for the past 10 years. Mr. Trout, the owner of the fishing resort on the lake, wants to increase the number of salmon available for his clients to catch fishing. He plans to stock the lake with 1,000 more salmon. Explain to Mr. Trout what will happen to the lake and the salmon population if he adds 1,000 extra fisharrow_forwardRead the article given below and answer the questions that follow: Recent increases in populations of seabirds that were depleted severely during the middle of the twentieth century demonstrate the efficacy of conservation strategies that work within the context of local culture. Along the North Shore of the Gulf of St. Lawrence in Quebec, Canada, direct exploitation and disturbance of breeding seabirds caused severe declines for several species between 1955 and 1978, including 84 percent and 76 percent declines for Razorbill and Atlantic Puffin, respectively. Significant reductions also occurred for populations of Common Eider (Somateria molissima), Common Murre (Uria aalge), and Black Guillemot (Cyphus grylle). Research by the Quebec-Labrador Foundation, a nonprofit conservation organization, into root causes of the population declines along a 400-km stretch of coast revealed conflicts between conventional enforcement of migratory bird regulations and cultural norms. A household…arrow_forwardLake Winnipeg is a shallow lake composed of two basins: a wide north basin and a narrow southbasin that provides a habitat for over 50 different species of fish. Each of the statements belowinvolves a situation that will affect the growth of a population. Classify each of the statements asDD (density dependent) or DI (density independent) and give a reason for your choice.1. Rainbow smelt and yellow perch attempt to occupy the same area. The more aggressive smeltsurvive; the perch do not. __________________________________________________2. A severe flood brings a lot of sediment and silt into Lake Winnipeg. The turbidity of the lakeincreases greatly. ________________________________________________________3. Since northern pike prey on yellow perch, an increase in the perch population causes anincrease in the pike population. _______________________________________________4. Many fish die due to an increase in water…arrow_forward
- Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSONBiology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStaxAnatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
- Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & CompanyLaboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education