Ecology Chapter 11 and 12 questions
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Which of the following cannot be a resource?
All of the above can be resources.
Based on Brewer's experiments with the pitcher plant Sarracenia alata, we can conclude that S. alata uses nutrients derived from _______ to support its growth, and competes with its neighbors for _______.
animal prey; light
The effect that one species has on a competing species can be represented by
Which of the following was established by Brown and Davidson's study of a desert community?
There is substantial overlap in the seeds eaten by ants and rodents.
Which of the following would most likely help in the long-term persistence of a fugitive species?
Gause's laboratory experiments with Paramecium illustrate the principle of
Which of the following statements about Tansley's experiments with bedstraw plants is false? (All are true)
a. When grown alone, the bedstraw plant that is found on acidic soils in the wild could survive on calcareous soils. b. When grown alone, the bedstraw plant that is found on calcareous soils in the wild could survive on acidic soils. c. When the two types were placed together on acidic soil, only the bedstraw plant found in the wild on acidic soils could survive. d. When the two types were placed together on calcareous soils, only the bedstraw plant found in the wild on calcareous soils could survive.
There are two pairs of competing species of mayflies. Species A and B are competing, and have carrying capacities of 2,000 and 800 respectively. The competition coefficient of species B on A is 0.5 and the competition coefficient of A on B is 0.25. Species C and D are separately competing; these have carrying capacities of 10,000 and 20,000 respectively. The competition coefficient of species D on C is 0.2 and the competition coefficient of C on D is 0.1. Based on the Lotka-Volterra equation, which of these pairs of species can coexist? How do you compute it?
Both pairs of species, look up that formula and ask if we get it on the test
Two species of Drosophila have been competing in the lab for a long time. A researcher notes that over the course of time, the competition coefficients of these species have become smaller. What is the most likely explanation of this change?
Which of the following statements about allelopathy is true? Both are true
- It is a form of interference competition.
- It occurs when individuals of one species release chemicals that harm individuals of another species.
The results of Connell's experiments with intertidal barnacles support which of the following principles of competition?
Both competition and physical factors can limit the local distribution of species.
In the Lotka Volterra predator-prey model, what does the b term represent?
The efficiency with which prey biomass is converted into predator offspring
In Huffaker's studies of an herbivorous mite and its mite predator, which of the following was critical in determining whether the populations of predator and prey would quickly go extinct or could exist in population cycles?
The complexity of the habitat
In his studies of different species of marine snails, Cotton found that snails with the highest aspect ratio were the _______ to seek refuge when they detected predators. These snails were also the _______ for the predators to crush.
Which of the following statements about predators and herbivores is true?
Having a broad diet is more typical of a predator than an herbivore.
What is the major difference between predation and herbivory versus parasitism and parasitoidism?
Most parasites and parasitoids spend their entire lives consuming a single individual, whereas herbivores and predators usually eat at least several different individuals.
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