Chapter 11. Diversification of the Eukaryotes: Animals
... better than any other model for describing the general growth pattern of populations, some populations cycle between periods of rapid growth and rapid shrinkage. ...
... better than any other model for describing the general growth pattern of populations, some populations cycle between periods of rapid growth and rapid shrinkage. ...
Population Ecology - School of Environmental and Forest Sciences
... • Density dependence tends to push populations toward carrying capacity, K • Consequently, populations do not grow indefinitely (over long term) • Yet they often don’t rest at K either – i.e., density dependence doesn’t always lead to a static equilibrium ...
... • Density dependence tends to push populations toward carrying capacity, K • Consequently, populations do not grow indefinitely (over long term) • Yet they often don’t rest at K either – i.e., density dependence doesn’t always lead to a static equilibrium ...
Human overpopulation
Human overpopulation occurs if the number of people in a group exceeds the carrying capacity of the region occupied by that group. Overpopulation can further be viewed, in a long term perspective, as existing when a population cannot be maintained given the rapid depletion of non-renewable resources or given the degradation of the capacity of the environment to give support to the population.The term human overpopulation often refers to the relationship between the entire human population and its environment: the Earth, or to smaller geographical areas such as countries. Overpopulation can result from an increase in births, a decline in mortality rates, an increase in immigration, or an unsustainable biome and depletion of resources. It is possible for very sparsely populated areas to be overpopulated if the area has a meager or non-existent capability to sustain life (e.g. a desert). Advocates of population moderation cite issues like quality of life, carrying capacity and risk of starvation as a basis to argue against continuing high human population growth and for population decline.