Free ecology PowerPoint presentations for teachers and students, created by teachers from around the world. There are 33 presentations below covering ecosystems and habitats, food chains and webs, populations, nutrient cycles, biodiversity and human impact on the environment, from KS3 through GCSE to A level. Click a title to download the slides, then edit them to suit your lessons.
Ecosystems and habitats PowerPoints
What ecology is, and how living things interact with each other and their surroundings.
- What is ecology
- Ecology
- Ecosystems
- Environments
- In their natural habitats
- Interactions of life: communities
- Ecological relationships
- Natural vegetation
Food chains, food webs and pyramids PowerPoints
How energy passes through an ecosystem.
- Food chains and food webs
- Food chains and webs
- Food webs
- Food web of the Arctic
- Environment and feeding relationships
- Feeding
- Pyramids
Populations and interdependence PowerPoints
Population size, predators and prey, competition and symbiosis.
- Populations and ecosystems
- Populations
- Characteristics of a population
- Predators and prey
- Symbiosis
- Symbiosis (2)
- Symbiosis (3)
- Symbiosis and homeostasis
Nutrient cycles PowerPoints
How nitrogen and other materials are recycled in nature.
Back to topicsBiodiversity and human impact PowerPoints
Habitat loss, pollution, global warming, farming and our use of resources.
- Biodiversity and habitat loss
- The influence of human activity on the environment
- Pollution
- Global warming
- Our Earth’s resources
- Food production and the environment
- Intensive farming
- Hedgerows and monoculture
Tips for teaching ecology with PowerPoint
- Start outside if you can. A quick look at the school field or a photo of a local habitat makes ecology feel real.
- Build food webs live. Add organisms and arrows one at a time so students see how a web grows.
- Use real data. Population graphs, such as lynx and hare numbers, make predator and prey cycles easy to discuss.
- Draw the cycles. Animate the nitrogen or carbon cycle step by step rather than showing it all at once.
- Make it local. Link human impact to issues near your school, such as litter, hedgerows or rivers.
- End with a debate. A slide asking how we balance farming with wildlife gets everyone talking.
More free biology PowerPoints
Back to all biology PowerPoints, or see cell biology, genetics, evolution, classification and animals and plants. Other sciences: chemistry, physics and astronomy.
Want to explore ecosystems in 3D? Try the VR biology apps reviewed at The XR School.