Carrying capacity in ecology refers to the level of land or resource use both by humans and animals that can be sustained by the natural regenerative power of the environment. Sustainable development is economic activity or growth with due consideration given to carrying capacity and which does not reduce or deplete the resources available to future generations. Current growth and consumption patterns are placing increasing stress on ecosystems ignoring the carrying capacity. Environmental degradation, biodiversity loss, deforestation indicate that ecosystems are stressed and the carrying capacity is being compromised. Human population is above the long-term carrying capacity and is maintained by the exploitation of fertile soils, fossil fuels, and ground water.
According to the concept of carrying capacity a finite number of people can be supported without degrading the natural environment. The concept of carrying capacity of an ecosystem for natural populations is derived from the logistic growth curve in population ecology.
Carrying capacity definitions that focus solely on resource limitations alone may neglect wider functional factors. Humans, with the need to enhance their reproductive success as described in The Selfish Gene (Richard Dawkins), understand that food supply can vary and also that other factors in the environment can alter humans' need for food.
Aspects of a system's carrying capacity may involve available supplies of food, water, raw materials, and similar resources. Other factors that govern carrying capacity increasing levels of wastes, and eradication of essential components.
Land Reform, Range Ecology, and Carrying Capacities in Namaqualand, South Africa. Benjaminsen, Tor A.; Rohde, Rick; Sjaastad, Espen; Wisborg, Poul; Lebert, Tom. A contribution at the interface of human ecology and political ecology, linking environmental issues to economic constraints, land rights, social justice, and values.
Kessler, J.J. "Usefulness of the human carrying capacity concept in assessing
ecological sustainability of land-use in semi-arid regions". Agriculture, Ecosystems
and Environment 48(1994) : 273-284.
Mwalyosi, R.B.B. "Population growth, carrying capacity and sustainable development in Southwest Masailand." Journal of Environmental Management 33, no. 2: 175-187.
Rees, William E. " Ecological footprints and appropriated carrying capacity : what urban economics leaves out. " Environment and urbanization 4(1992): 121-129.
Wackernagel, Mathis. How big is our ecological footprint? Using the concept of appropriated carrying capacity for measuring sustainability. Vancouver: University of British Columbia Task Force on Planning Healthy and Sustainable Communities, 1993. 8 p.
Western, S. "Carrying capacity, population growth, and sustainable development: a case study from the Philippines." Journal of Environmental Management 27, no. 4: 364-367.