References
1. The video about food chains, food webs and energy transfer is from: https://edpuzzle.com/media/63d450add54ad8415571f05c
2. The picture in the Issues in the food webs page is from: https://www.scientificamerican.com/article/krill-are-disappearing-from-antarctic-waters/
3. The article on krills disappearing from antarctic waters is from: https://www.scientificamerican.com/article/krill-are-disappearing-from-antarctic-waters/
4. The podcast on preserving oceanic ecosystem is from: https://www.bbc.co.uk/sounds/play/p03cgbys
5. The picture in the oceanic ecosystem page is from: https://www.bbc.co.uk/sounds/play/p03cgbys
6. Image for Ecosystem Mind Map is From https://www.toppr.com/ask/content/posts/ecosystem/mindmap-33811/
7. Learning activity is from https://quizizz.com/admin/quiz/63ec4507820c6f001d4b2e46/food-webs-and-ecosystems-quiz?selfCreated=true