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F215 Module 3: Ecosystem and Sustainability
5.3.2 Populations and Sustainability

(a) explain the significance of limiting factors in determining the final size of a population
Population size is a balance between death rate and rate of reproduction . A habitat cannot support a population
larger than its carrying capacity because…

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F215 Module 3: Ecosystem and Sustainability

In 1934, GeorgyiFrantsevitchGause grew two species of Paramecium , both
separately and together. When together, there was competition for food,
with Paramecium aurelia obtaining more food effectively than
Parameciumcaudatum , resulting in Paramecium caudatum dying out and the
numbers for Paramecium aurelia increasing, eventually…

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F215 Module 3: Ecosystem and Sustainability

Preservation is the protection of ecosystems, as yet unused by humans, leaving it untouched so it is kept exactly
as it is.
(f) explain how the management of an ecosystem can provide resources in a sustainable way, with reference to
timber production in a…

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F215 Module 3: Ecosystem and Sustainability

(h) discuss the economic, social and ethical reasons for conservation of biological resources
Economic Social Ethical
Provide resources that humans need, e.g. clothes, food, drink, Areas to enjoy Organisms have
etc. for recreation, the right toexist .
Genetic diversity in wild strains may be…

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F215 Module 3: Ecosystem and Sustainability
'No take' areas have been set up where tourists
are not allowed to extract resources and
communitiesare left undisturbed .


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