100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Previously searched by you
Previously searched by you
logo
Summary IEB Population Ecology notes CA$8.04   Add to cart
Quickly navigate to
Preview
  2.  
  3. 12th Grade
  4.  
  5. Life Sciences

Summary

Summary IEB Population Ecology notes
 19 views  0 purchase
  • Course
  • Life Sciences
  • Institution
  • 12th Grade

Helped me get an A+ in Biology in Matric. Summarises everything well making sure in-depth knowledge is attained. This topic is tested in matric and it is reminded that the IEB markers are looking for specific words in your definitions. These definitions given must be word-for-word. Enjoy!

Preview 3 out of 22  pages

Document information

  • June 2, 2024
  • 22
  • 2023/2024
  • Summary

Subjects

  • population ecology

Written for

  • 12th Grade
  • Life Sciences
  • 200
All documents for this subject (1092)

Seller

avatar-seller
gracel

Reviews received

Content preview

POPULATION ECOLOGY
Interaction of organisms with their physical and biological environment


Terminology

Species
Group of organisms with similar characteristics  which can interbreed to
produce fertile offspring 

Habitat
Specific type of environment (area)  in which a plant or animal species
normally occur 

Population
Group of organisms of the same species  that occur in a particular area 
in a particular time  so that interbreeding occurs

Community
Group of populations  occurring in a particular area e.g., lion, zebra and
giraffe in a National Park.

Ecosystem
Interaction between the biotic factors  and abiotic factors in a particular
area 

Ecology
Study of mutual interaction among living organisms and environment  in
which they live

Biosphere
Part of the earth where living organisms are found.

Size of a population
the number of individuals  in a population 

Population density
the number of individuals  of the population per unit of area 

Population Density = Number of People
Land Area

The unit of land area should be square miles or square kilometers

,Population parameters

Mortality – death rate of a population expressed as the number of death per
thousand individuals per year

How do you calculate the mortality rate

1. Find the number of deaths and the population size reported during
the specified period.
2. Divide the number of deaths by the population size.
3. Choose the exponent, n.
4. Multiply the result by 10ⁿ (eg: 1000) to get the result per every 10ⁿ
people.

Natality – birth rate of a population expressed as the number of live per
thousand individuals per year

, Immigration – one-way movement of organisms into an area

Emigration – one-way movement of organisms out of an area

Migration – moves from one place to another and returns to the original
place

Impact of population parameters

 Natality and immigration cause an increase in population size.
 Mortality and emigration cause a decrease in a population size.
 No immigration or emigration in a closed population e.g. animals on an
island. (The only parameters affecting population numbers will be births
or deaths)
 Natality and mortality can affect the population size in a closed
population.

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

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

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

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 gracel. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for CA$8.04. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

75323 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 14 years now

Start selling
CA$8.04
  • (0)
  Add to cart