Food chains, food webs and ecological pyramids are models to show feeding relationships in ecosystems. Interactions between organisms and their environment results in transfers and transformations of energy and matter.
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Lessons
1 | Respiration and photosynthesis | ||||||
2 | Food chains, food webs and feeding relationships | ||||||
3 | Ecological pyramids | ||||||
4 | Productivity pyramids and limitations to food chain length | ||||||
5 | Bioaccumulation and biomagnification |
Practicals
- Construct/modify a feeding relationship model using given data e.g. Using the Lotka-Volterra equations (information and model here).
Essay Task
“DDT can accumulate through the food chain in increasing concentrations as a consequence of biomagnification. Compare the attitudes that an ecocentrist and an anthropocentrist may have on the use of DDT.” [9 marks]
The essay should marked using the Paper 2, Section B essay markbands.
Google Docs Version
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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.