Populations in Ecosystems

• Ecology is the study of the relationships between organisms and their environment
• Biotic factors include competition, predation, disease and availability of food
• Abiotic factors include temperature, pH, water availability and light
• An ecosystem is a community of living and non-living factors in an environment
• A population is a group of individuals from one species occupying the same habitat
• A community is all the populations of different species living in the same habitat
• A habitat is a place where an organism normally lives
• An ecological niche is how an organism fits into the environment