How humans affect populations of other organisms - A2 synoptic essay plan

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Peaches and Cream
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#1
Report Thread starter 6 years ago
#1
Hiya! I'm currently writing an A2 Biology synoptic essay,and the title is "How do humans affect populations of other organisms".

As it's quite a geography-related question I'm finding it really tricky to write and was wondering if anyone had an essay plan for it? Thanks!
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SlowlorisIncognito
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#2
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Hi

I would say it's more of an ecology related question than geography, so I would think about how human landscape use could affect different wildlife populations, for example:

Farming: will affect the plants able to grow in an area. Run-off from pesticides/herbicides/fertilisers may also cause issues in rivers/streams nearby. If hedgerows are removed, this will reduce the habitat available for small mammals, birds and insects. Large grazing animals (e.g. cows and sheep) will also change the plants present in an area, and this may cause other animals (especially small mammals) to lose important food sources. Pesticides may also affect insect populations. Conversely, if flowering plants are planted, these may be beneficial for insects such as bees.

Urban areas: Concreting over areas reduces the available space for lots of plant and animal species. This can also increase flooding, which might be a problem for some species. Pets, especially cats, are a major problem because they will often kill/disturb nesting birds, which may mean they can't reproduce successfully (people might also do this). However, some people also deliberately feed wildlife, which can increase survival rates over winter, and some animals, e.g. house mice, have adapted to live in urban environments.

You could also mention things like invasive species being introduced to the environment by humans- these can have a devastating effect on native wildlife populations.

I hope this gives you some ideas.
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Peaches and Cream
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#3
Report Thread starter 6 years ago
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(Original post by SlowlorisIncognito)
Hi

I would say it's more of an ecology related question than geography, so I would think about how human landscape use could affect different wildlife populations, for example:

Farming: will affect the plants able to grow in an area. Run-off from pesticides/herbicides/fertilisers may also cause issues in rivers/streams nearby. If hedgerows are removed, this will reduce the habitat available for small mammals, birds and insects. Large grazing animals (e.g. cows and sheep) will also change the plants present in an area, and this may cause other animals (especially small mammals) to lose important food sources. Pesticides may also affect insect populations. Conversely, if flowering plants are planted, these may be beneficial for insects such as bees.

Urban areas: Concreting over areas reduces the available space for lots of plant and animal species. This can also increase flooding, which might be a problem for some species. Pets, especially cats, are a major problem because they will often kill/disturb nesting birds, which may mean they can't reproduce successfully (people might also do this). However, some people also deliberately feed wildlife, which can increase survival rates over winter, and some animals, e.g. house mice, have adapted to live in urban environments.

You could also mention things like invasive species being introduced to the environment by humans- these can have a devastating effect on native wildlife populations.

I hope this gives you some ideas.
This is brilliant, thank you so much
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SlowlorisIncognito
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#4
Report 6 years ago
#4
(Original post by Peaches and Cream)
This is brilliant, thank you so much
Glad you found it helpful
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