Population ecology is the study of the relationships between populations and their environment. A population is defined as a group of the same species occupying a particular area. Characteristics of a population include its size, density, and distribution. Biotic interactions like competition and predation regulate population growth. Techniques like quadrat sampling, capture-mark-recapture, and random sampling are used to estimate population size, density, and distribution. Abiotic factors like temperature, light, humidity, and pH influence an organism's population distribution.

1. 8.3 Population Ecology 8.3 Population Ecology

5. Quadrat Sampling

9. Capture, Mark, Release And Recapture Technique

15. Random Sampling

18. Removal method

20. Abiotic factors which influence the population distribution of an organism