Monitoring and maintaining the environment

5. The introduction of harmful substances into the environment.
7. A tool that identifies organisms by answering a series of paired questions.
9. A container sunk into the ground to catch crawling invertebrates.
12. Responsible travel that supports conservation and benefits local communities.
15. A line across a habitat used to investigate changes in species distribution.
17. Reptiles found on the Galápagos Islands that have adapted to different environments.
18. The clearing of forests, often to create farmland or obtain timber.
19. Primatologist who studied mountain gorillas in Rwanda

1. The variety of different species living in an area.
2. A tropical forest with high rainfall and very high biodiversity.
3. A community of organisms interacting with each other and their environment.
4. Pacific islands visited by Darwin that influenced his ideas about evolution.
5. A small collecting device used to capture insects and other tiny organisms.
6. All members of one species living in a particular area.
8. A method of selecting study sites by chance to avoid bias.
10. The cultivation of crops and rearing of animals for food production.
11. A square frame used to estimate the abundance of organisms in a habitat.
13. The protection and management of species and habitats.
14. The average value obtained by adding results and dividing by the number of results.
16. A net used to collect insects from long grass and vegetation.