Which observation would be considered more accurate and useful?Observation 1: There are fewer elk in the Yellowstone National Park that there used to be.Observation 2: The density of elk in Yellowstone National Park has declined during the consecutivedry years since the reintroduction of the native wolf population.No answer text provided.Observation 2None of the aboveObservation 1

More accurate observations try to address the pattern and cause of the observation. In a…

Answered: Which observation would be considered…

Biology Today and Tomorrow without Physiology (MindTap Course List)

5th Edition

ISBN:9781305117396

Author:Cecie Starr, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Christine Evers, Lisa Starr

Chapter16: Population Ecology

Section: Chapter Questions

Problem 1DID

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A population of 1,000 individuals experiences 462 births and 380 deaths in 1 year. What is the value of r for this population? a. 0.842/individual/year b. 0.462/individual/year c. 0.380/individual/year d. 0.820/individual/year e. 0.082/individual/year
The largest population that can be maintained by a particular environment for an indefinite period is known as a (a) semelparous population (b) population undergoing exponential growth (c) metapopulation (d) populations carrying capacity (e) source population
Which of the following methods will provide information to an ecologist about both the size and density of a population? a. mark and recapture b. mark and release c. quadrat d. life table
Most commonly, individuals of a natural population show a __________ distribution through their habitat. a. random b. clumped c. near uniform
In a graph of population size versus time, a J-shaped curve is characteristic of (a) exponential population growth (b) logistic population growth (c) zero population growth (d) replacement-level fertility (e) population growth momentum
Which of the following is best at showing the life expectancy of an individual within a population? a. quadrat b. mark and recapture c. survivorship curve d. life table
Figure 45.2 As this graph shows, population density typically decreases with increasing body size. Why do you think this is the case?
______ is a density-independent factor that influences population growth. a. Predation b. Infectious disease c. Resource competition d. Harsh weather
The CDC released the following data in its 2013 Vital Statistics report. Age interval Number dying in age interval Number surviving at beginning of age interval 0-10 756 100,000 11-20 292 99,244 21-30 390 98,953 31-40 1,234 98,164 41-50 2,457 96,311 51-60 5,564 94,352 61-70 10,479 38,788 Table 45.3 Calculate the mortality rate for each age interval, and describe the trends in adult and childhood mortality per 100,000 births in the United States in 2013.
When r is a positive number, the population size is (a) stable (b) increasing (c) decreasing (d) either increasing or decreasing, depending on interference competition (e) either increasing or stable, depending on whether the species is semelparous
Figure 19.6 If the major food source of seals declines due to pollution or overfishing, which of the following would likely occur? a. The carrying capacity of seals would decrease, as would the seal population. b. The carrying capacity of seals would decrease, but the seal population would remain the same. c. The number of seal deaths would increase, but the number of births would also increase, so the population size would remain the same. d. The carrying capacity of seals would remain the same, but the population of seals would decrease.
Match each term with its most suitable description. _____ carrying capacity a. maximum rate or increase per individual under ideal conditions _____ exponential growth b. population growth plots out as an S-shaped curve _____ biotic potential c. maximum number or individuals sustainable by the resources in a given environment _____ limiting factor d. population growth plots out as a J-shaped curve _____ logistic growth e. essential resource that restricts population growth when scarce

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