6 marksFigure 11a shows the global human footprint in 2009.
Figure 11b shows the change in the global human footprint between 1993 and 2009.
Figure 11a
The global human footprint in 2009.
Figure 11b Change in the global human footprint between 1993 and 2009
Note: The global human footprint combines the pressures of infrastructure, human land use and human access on natural areas.
Analyse the data shown in Figure 11a and Figure 11b.
[6]
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1 markWhat is the distinction between the biotic and abiotic components of an ecosystem?
[1]
Biotic elements are the weathered rock and leaf litter. These elements interact with the organisms, heat and light (abiotic) to help produce a soil structure.
Biotic elements are part of the structure of a food chain. The biotic elements provide the building blocks of life. The abiotic elements feed off the biotic elements in the food chain.
Biotic elements are responsible for processes such as leaching and decomposition. Abiotic elements provide the raw materials (such as water) which allow life to flourish.
Biotic elements are the living part of an ecosystem such as micro-organisms, plants and animals. Life is supported by the abiotic elements such as weathered rock, climate and various gases.
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20 marks‘Changing attitudes towards sustainable tourism, recreation and conservation have meant that local scale ecosystems are no longer under threat.’ To what extent do you agree with this view?
[20]
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20 marks‘It is simply not possible to find a true balance between biodiversity and sustainable economic development in savanna grasslands. Economic development will always come at the expense of biodiversity.’ To what extent do you agree with this view?
[20]
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