Ravintoverkko; By LadyofHats, via Wikimedia Common; CC0 1.0 Universal Public Domain Dedications
Nettilähteitä suomeksi
- | YLE | :: Kouluportti :: Ekolokero
- Ravintoketju (HotPotatoes-tehtäviä)
- Ravintoketjut ja trofiatasot
- Pohjoisen luonto: Tervetuloa ekologian pariin!
Englanniksi
- General&Human Biology:Ecology
- General&Human Biology:Ecology; Natural History
- General & Human Biology: Ecology; Communities
- General & Human Biology: Ecology; Ecosystems
- General & Human Biology: Ecology; Biosphere
- General & Human Biology: Ecology; Human Impact
- highered.mcgraw-hill.com: Dynamics of Ecosystems
- Ecology.com – An Ecological Source of Information
- World Resources Institute
- Instructional Multimedia, University of Alberta
- ScienceDaily (Dec. 9, 2008); Movement Ecology
- United Nations Environment Programme (UNEP) – Home page
- ScienceDaily (Apr. 13, 2010); Move over predators: Plants can control the food chain too — from the bottom