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BIOA02H3 Lecture : Conservation Ecology (Lecture Notes)

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9 Apr 2011

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Biological Sciences

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BIOA02H3 Full Course Notes

BIOA02H3 Full Course Notes

Document Summary

What is conservation biology: conservation biologyan applied science, devoted to preserving the diversity of life. way to estimate species: species-area relationshipproportionate; 90% decrease of habitat results in 50% decrease in species, computer (statistical) modelspopn size, genetic variation, morphology, physiology, behaviour. human activities that threaten species survival: habitat loss: species respond different when losing their habitat. patches of the habitat remain, but depending on the size of the patch, the edge changes; where species are endangered. the smaller a patch becomes, the perimeter decreases, but not as much. edge effects: stronger winds, temperature, and lower humidity, competition with prey if a patch is connected to the main land, the extinction rate is less than if it were isolated, over-exploitation. overhunting: i ntroduction of exotic species. bringing in new species into a different environment both intentionally and accidentallycauses some species to be over taken, and therefore endangered and extinct.

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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.

a. Describe why preventing extinction is at the heart of biodiversity conservation.

b. Describe how extinctions of bird species compares to extinctions of other species.

c,Describe what makes a species more likely to become extinct.

carminerhinoceros477

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

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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

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

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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

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.