Question: demography

Answer: Scientific study of human populations.

Question: population density

Answer: Number of individuals per unit area

Question: density-dependent limiting factor

Answer: limiting factor that depends on population size

Question: density-independent limiting factor,

Answer: limiting factor that affects all populations in similar ways, regardless of population size.

Ex; hurricanes, tsunamis.

Question: biological magnification

Answer: increasing concentration of a harmful substance in organisms at higher trophic levels in a food chain or food web

Question: Ecological footprint

Answer: the impact of a person or community on the environment, expressed as the amount of land required to sustain their use of natural resources.

Question: Sustainable Development

Answer: development that balances current human well-being and economic advancement with resource management for the benefit of future generations

Question: Describe how ecologists use the ecological footprint concept

Answer: