Concept explainers
Introduction: The number of different species and the number of individuals in a given community are characteristics of a population. Differences in the characteristics of a population lead to variations in the populations.
Answer to Problem 1TY
Correct answer: A community with many individuals but few different species exhibits low species richness and high abundance. Hence, the correct answer is option c.
Explanation of Solution
Reason for correct answer:
The number of species in an ecological community is called species richness. Species richness simply refers to the number of different types of species in an area and does not include the number of individuals within a given species. Therefore, the description “species richness is low and its abundance is high in a community” indicates that the community has many individuals but few different species.
Option c. is given as “low species richness and high abundance”.
If many individuals but few different species are seen in a community, it is said to have low species richness and high abundance. Hence, the correct answer is option c.
Reasons for incorrect answer:
Option a. is given as, “low abundance and high species complexity”.
Species complexity refers to the identity and differences between the individual species. The number of individuals and species in a population does not play a role in the species complexity. Also, the species complexity in the given community is high and the abundance is low. Hence, option a. is incorrect.
Option b. is given as, “high stability”.
Certain evidences have been recorded and it state that a higher species diversity leads to a higher stability of the population. In the given community, the numbers of different species are few, therefore the species diversity is also low. This population is expected to have low stability. Hence, option b. is incorrect.
Option d. is given as, “high species diversity”.
The number of species in an ecological community is called species richness. Species richness of the given species is low as there are few different types of species. Hence, option d. is incorrect.
Option e. is given as, “high abundance and high species richness”.
In the given community, abundance is high as the number of individuals in the community is high. However, the species richness is low as the number of different species in the population is low. Hence, option e. is incorrect.
Hence, the options a., b., d. and e. are incorrect.
Thus, abundance refers to the number of individuals and species richness refers to the number of different types of species.
Want to see more full solutions like this?
Chapter 58 Solutions
BIO 111&113+2 YEAR CONNECT ACCESS CODE
- Species richness refers to Group of answer choices a. number of species in a community b. how even in abundance the species in a community are c. extinction rate of species d. number of trophic interactions in a food web e. number of species plus evenness of numbers of individualsarrow_forwardWhy do moderate levels of disturbance result in an increase in community diversity?a) The resulting uniform habitat supports stability, which in turn supports diversity.b) Less-competitive species evolve strategies to compete with dominant species.c) Habitats are opened up for less competitive speciesd) Competively dominant species infrequently exclude less competitive species after a moderate disturbance.arrow_forwardK-selected species typically a) have short life spans b) display a logistic graph c) are more competitive than r-selected species d) live close to the biotic potential, taking advantage of the environmental conditionsarrow_forward
- Which of the following attributes of a community would tend to lead to higher species richness? High specialization of species A broad resource spectrum High population size in each species Both a and b Both b and carrow_forwardThe relative abundance of any one species within a community of many species is known as a. species evenness. b. species richness. c. specialization. d. population.arrow_forwardThe smallest population of a species that is likely to be able to survive in the long term is called the_________ . When suitable habitat for a given species is split up into areas that are too small to support a large enough population, this is called_______ . One way to maintain large enough populations is to set up core reserves of suitable habitat, connected by_______ .arrow_forward
- By a currently favored hypothesis, species richness of a community is greatest when physical disturbances are of_____ intensity and frequency. a. low c. high b. intermediate d. variablearrow_forwardWhen interspecific competition is weaker than intraspecific competition for both species A & B in the Lotka-Volterra competition model_________________. a. species A wins b. both species coexist c. both species go extinct d. species B winsarrow_forwardWhich of the following is true about a community's species diversity? If a community has species richness, it automatically means it also has species diversity. A community can only have either species richness or species diversity, but not both A community can have either species richness or species diversity, or both. None of the abovearrow_forward
- Which of the following statements is correct regarding the competitive exclusion concept? a. multiple species can’t share the exact same niche within a community b. the realized niche of a species is different from its fundamental niche. c. competition within a population results in the success of the best-adapted individuals. d. two species cannot coexist within the same habitat.arrow_forwardThe presence of one species (A) in a community may benefit another species (B) if a. a commensalistic relationship exists between the two. b. The first species (A) preys on a predator of the second species (B). c. The first species (A) preys on a species that competes with a species that is eaten by the second species (B). d. All of the choices are correct.arrow_forwardCarrying capacity is defined as a species’ average population size in an environment. Which of the following resulted to exceeding carrying capacity in a particular environment? a. increasing birthrates, decreasing deathrates, increasing immigration and no emigration takes place b. increasing birthrates, decreasing deathrates, decreasing immigration and no emigration takes place c. increasing birthrates, decreasing deathrates, decreasing immigration and increasing emigration d. decreasing birthrates, increasing deathrates, increasing immigration and increasing emigrationarrow_forward
- Biology (MindTap Course List)BiologyISBN:9781337392938Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. BergPublisher:Cengage LearningConcepts of BiologyBiologyISBN:9781938168116Author:Samantha Fowler, Rebecca Roush, James WisePublisher:OpenStax College