Summary Eduquas (England) A-level biology paper 1: Human impacts
5 views 0 purchase
Course
BY5 - Environment, Genetics and Evolution
Institution
WJEC
This is summary note on the topic human impacts on the environment for a-level biology and includes notes on:
- reasons for endangerment
- Conservation of gene pools
- agriculture exploration
- Political diction making on the environment
- Planetary boundaries
- reasons for endangerment
- gene pools
- agricultural exploitation
- political decision making
- planetary boundaries
, Reasons for endangerment
Mass extinction
Definition: A mass extinction event is when species
vanish much faster than they are replaced. This is
usually defined as about 75% of the world's species
being lost in a short period of geological time - less than
2.8 million years.
Humas are to blame for the 6th mass extinction.
It is believed that increasing human population and
increased consumption since the industrial revelation is
causing destruction of habitats and species extinction.
When humans destroy habitats of heat them (climate
change) it cusses extinction as their habitat is now
outside there biological niches.
Humans are also introducing non-native animals into wild
areas causing extinction of the native animals as the
others invade there habitats.
Threated factors
1. Natural selection
This is where the spices are not well suited to its
environment and so reproduces less successfully this can
cause extinction. Humans are changing habitats more
quickly than the spices are adapting increasing extinction
levels.
2. Loss of habitat
This can be caused by deforestation, drainage of
wetlands, hedge row loss and agriculture. Hedgerows
provide a variety of light levels, temperature levels,
water availability and food this allows them to be home
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller jessdrew. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $6.48. You're not tied to anything after your purchase.
