Ecosystem revision questions

Created by: Georgia56
Created on: 10-04-18 16:57

Explain using scientific terms, why a collection of small islands remote from the mainland provides optimal conditions for speciation.

Geographical separation, reproductive isolation, different selection pressures/ environments, small gene pools, greater genetic drift

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Outline main ways in which increased human presence and activity have put endemic species on Galapagos Islands, and in the sea around them, at risk of extinction (link to ecological pressures imposed by human activity to e.g. of Galapagos).

Habitat/ ecosystem disturbance, land used for building/roads (urbanisation), agriculture/ farming, deforestation, increased pollution, eutrophication/ sewage, oil spills, hunting/poaching, over-fishing, competition new species, disease introduced,

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The UN put Galapagos Islands on the Red List of endangered sites. The Galapagos gov's response to this is making new laws placing restrictions on human activity, issuing eviction orders & culling introduced species of animals.

Suggest one economic and one ethical problem that might have arisen from the 2007 UN decision

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One economic problem...

fewer jobs/ smaller profits/ business closure/ reduced tourism/ less revenue.

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One ethical problem...

question of humane killing/ animal suffering, people suffering through losing their homes/ friends/ jobs.

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Define producer

(Leaves/plants) that fix carbon/ photosynthesise/ make food/ autotrophic. Convert light energy into chemical. Concert inorganic CO2 into organic molecules.

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Define consumer

(Bird) eat/ derives energy from/ feed on other organisms. Heterotrophic.

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Define trophic level

Stage/position/place/level in a food chain/web

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One economic problem...

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One ethical problem...

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Ecosystem revision questions