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1 | |
When referring to a group of individuals as a population, one should identify the _________________ that exists between this group and other groups. |
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| | A) | obstacle |
| | B) | distance |
| | C) | disjunction |
| | D) | similarity |
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2 | |
In the exponential growth model, population growth is determined only by the population's ________ and _________. |
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| | A) | size (N) and intrinsic rate of increase (r) |
| | B) | size (N) and carrying capacity (K) |
| | C) | carrying capacity (K) and migration |
| | D) | size (N) and environment |
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3 | |
Why does a logistic population growth curve level off ? |
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| | A) | Logistic growth occurs in populations that are not as healthy as those experiencing exponential growth. |
| | B) | The logistic growth curve is less realistic, over the long term, than the exponential growth curve. |
| | C) | All individuals in the population are too old to reproduce. |
| | D) | Population growth slows as population size approaches carrying capacity. |
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4 | |
"Stochastic" means: |
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| | A) | predictable |
| | B) | random |
| | C) | deterministic |
| | D) | problematic |
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5 | |
Which of the following is NOT one of the four "sources of uncertainty" that can affect population size? |
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| | A) | natural catastrophes |
| | B) | demographic stochasticity |
| | C) | taxonomic stochasticity |
| | D) | genetic stochasticity |
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6 | |
Which species went extinct as a result of overhunting and habitat destruction, followed by interacting stochastic forces? |
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| | A) | Goshawk (Accipiter gentilis) |
| | B) | Florida panther (Puma concolor coryii) |
| | C) | Heath hen (Tympanuchus cupido cupido) |
| | D) | Sage grouse (Centrocercus urophasianus) |
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7 | |
Which of the following is an example of environmental stochasticity? |
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| | A) | the death of a pregnant female |
| | B) | the Allee effect |
| | C) | the introduction of a new disease |
| | D) | a new generation with a highly skewed sex ratio |
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8 | |
The goal of population viability analysis is to: |
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| | A) | assess the risk of extinction for a population over a specific time period, with a specified probability level |
| | B) | diagnose the causes of a population's decline |
| | C) | prescribe conservation strategies for species at risk of extinction |
| | D) | provide a "yes" or "no" answer about whether a species will go extinct |
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9 | |
What is VORTEX? |
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| | A) | a computer model used to study the spread of diseases in an ecosystem |
| | B) | a suite of conservation problems associated with nonindigenous species |
| | C) | a method of constructing life tables |
| | D) | a computer model used to perform population viability analysis |
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10 | |
Which of the following is NOT a criticism of VORTEX and similar programs? |
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| | A) | assumptions are overly simplistic |
| | B) | required data usually are not available, especially for endangered species |
| | C) | output may not be useful |
| | D) | cannot incorporate stochasticity |
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11 | |
One of the strengths of population viability analysis (PVA) is that it: |
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| | A) | requires researchers to assemble all known facts about a population, and identifies areas of needed research |
| | B) | requires only limited data |
| | C) | can evaluate the viability of communities and ecosystems, as well as populations |
| | D) | is based on standard protocols that define what constitutes a valid PVA |
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12 | |
The minimum viable population (MVP) concept permits an estimate of population persistence at a specified level of ______ for a specified ______. |
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| | A) | heterozygosity, time |
| | B) | heterozygosity, habitat |
| | C) | probability, time |
| | D) | probability, habitat |
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13 | |
In which of the following ways are nonindigenous species spread around the world? |
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| | A) | release of ballast water from ships |
| | B) | transport of wood products |
| | C) | transport of produce |
| | D) | all of the above |
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14 | |
The U.S. Congressional Office of Technology Assessment estimated that at least _____ nonindigenous species have become established in their new environments. |
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| | A) | 450 |
| | B) | 4,500 |
| | C) | 45,000 |
| | D) | 100,000 |
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15 | |
All of the following are ecologically destructive nonindigenous species EXCEPT the: |
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| | A) | brown treesnake (Boiga irregularis) |
| | B) | pig (Sus scrofa) |
| | C) | Mediterranean fruit fly (Ceratitis capitata) |
| | D) | Lord Howe Island woodhen (Tricholimnas sylvestris) |
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16 | |
State two characteristics of a successful invading species. |
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17 | |
List three potential management responses to invasion of an ecosystem by a nonindigenous species. |
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18 | |
List the three steps offered as a conceptual framework for making management decisions. |
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2003 McGraw-Hill Higher Education