Impact of Environmental Change Flashcards

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What are some environmental factors that affect the distribution of organisms?

Temperature, availability of water, and composition of gases in the atmosphere.

How does temperature affect the distribution of organisms?

Organisms have adaptations for specific temperature ranges. Changes in temperature can affect food availability and cause organisms to migrate or face extinction.

What is desertification?

Desertification is the process by which fertile land becomes desert, often due to changes in temperature affecting plant growth.

How does water availability impact organisms in an ecosystem?

Water is essential for all organisms and plants. Changes in water availability can lead to migration and affect the whole food web and ecosystem.

How does the composition of gases in the atmosphere influence the distribution of organisms?

Greenhouse gases contribute to global warming. Pollutants like sulphur dioxide affect sensitive species, such as lichen, leading to their decline in polluted areas.

Why are wildebeest migrations important in North Africa?

Wildebeest migrate long distances following rainfall patterns in search of fresh grazing land and water. This illustrates the impact of water availability on organism distribution.

Revision Notes
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