2.1 – Species and Populations

An organism’s niche is its role within an ecosystem including all interactions with other organisms as well as with the non-living aspects of the environment.

An ecosystem can only support a limited population size of any species and this is known as the carrying capacity.


2Population changes: biotic and abiotic factors
3Carrying capacity / S and J curves
Chapter Workbook
Vocabulary Sheet

  • Investigate factors that affect an organism’s niche using a computer simulation. (Simulation here).

Full PSOW here.

Essay Task

Niche is a term typically associated with wild plants and animals. Describe a human’s niche, using examples to support your answer, and justify whether the term can be correctly applied to humans.” [9 marks]

View essay markbands

The essay should marked using the Paper 2, Section B essay markbands.

PDF Version

Google Docs Version

Google Docs 2.1 essay

Open the link and make a copy to your own drive. The doc can easily be shared as an “Assignment” on Google Classroom.

A markbands rubric designed for Google Classroom is available here.