Organisms and their Environment

Organisms and their Environment

1. Environment: All the conditions that surround a living organism

2. Habitat: The place where an organism lives

3. Population: All the members of a single species that live in a habitat

4. Community: All the populatinos of different organisms that live together in a habitat

5. Ecosystem: A community and the habitat in which it lives

6. Affect organisms; temp, light, water, nutrients, oxygen and carbon dioxide

7. Transects: line of e.g. rope, organisms recorded along

8. Quadrats: square of wire, organisms recorded in

   • placed randomly. validity and reproducibility increases as more quadrats are analysed

9. Distribution: where an organism is found

10. studying distribution: measure how common an organism is, how distribution changes across area

11. Calculating population size: mean x total area

12. Reliability: large sample size, random sample, repeat

13. Validity: control variables