BIOA02H3 Chapter 57: Study Guide for Chapter 57

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19 Jul 2010

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Human interference with different habitats and ecosystems have greatly increased the rate of extinction. An applied scientific discipline devoted to preserving the diversity. The embracing of certain values and the application of the scientific method in order to achieve these values. Although the processes of species extinction is a natural one, which has been done for millions of years, conservation biology aims to prevent the extinction of animals. For the first time in history, one species of ecosystem engineers (humans) are the cause of all major environmental changes, which disrupts the natural course of extinction/evolution of different species. Humans depends on other species for food, fibre and medicine. Humans derive aesthetic pleasure from interacting with other organisms. Causing the extinction of other species raises serious ethical issues. Extinctions make the study of ecological relationships and species interactions difficult: more species lost/extinct, the more harder it is to understand the structure and the functioning of ecological communities and ecosystems.

Related Questions

In the early years of the conservation movement (1970s), efforts were aimed mainly at the salvation of individual speciesâthat is, saving them from extinction. Today, conservation biology is aimed more at the biodiversity of the entire community and the ecosystem. Explain in detail why there has been this shift in focus. Give a specific example.

Question 292 pts

Which of the below are arguments for the preservation of biodiversity from the perspective of environmental ethics?

SELECT ALL THAT APPLY (You may need to select more than one answer)

Biodiversity must be preserved because of its direct use value

Biodiversity must be preserved because species have intrinsic value

The preservation of biodiversity is proper stewardship of the earth

None of these

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Question 302 pts

Which of the following is a consequence of biological magnification (biomagnification)?

Toxic chemicals in the environment pose greater risk to top-level predators than to primary consumers.

The amount of biomass in the producer level of an ecosystem decreases if the producer turnover time increases.

Populations of top-level predators are generally smaller than populations of primary consumers.

Only a small portion of the energy captured by producers is transferred to consumers.

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Question 312 pts

Which of the below can reduce the quality of habitat fragments for species that typically occur deep in the forest?

SELECT ALL THAT APPLY (You may need to select more than one answer)

Decreased levels of humidity

Increased levels of wind

None of these

The presence of housecats

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Question 322 pts

Hannah et al. (2002) concluded that______________

SELECT ALL THAT APPLY (You may need to select more than one answer)

The Kyoto Protocol is likely to halt the increase in CO2 emissions

Conservationists must become active in the debate over climate change

Shifting ranges of species due to climate change will require international cooperation to conserve

None of these

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Question 332 pts

What does it mean when we say that conservation biology is a normative discipline?

It argues that extinctions are not natural, and should always be prevented

None of these

It's a discipline that is neutral to the question of whether biodiversity should be preserved

It's a discipline that embraces particular values

Will rate when all are answered.

Sometimes, conservation biologists believe they do not need to take into account the possibility of evolutionary change in the organisms that they are interested in conserving. The argument is that anthropogenic (human induced) changes such as invasive species, habitat loss, pollution, and even climate change, occur on too rapid a timescale for evolutionary change to influence the organisms they are trying to manage.

Discuss whether you think this argument is correct, or if you think evolutionary biology relevant for conservation biology? Find an example or two to support your argument.

BIOA02H3 Chapter 57: Study Guide for Chapter 57

BIOA02H3 Full Course Notes

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