Limits to Growth and Human Carrying Capacity. D Oehlke ESS. Enduring Understanding: Water and soil are valuable resources, which must be used more carefully as the human population grows.
Water and soil are valuable resources, which must be used more carefully as the human population grows.
2. Much of the current agricultural practices result in soil degradation and water pollution. Thus our food supply is unsustainable.
3. Nonrenewable energy resources will be consumed at some point, making the development of renewable resources very important.
4. Reduction in wastes through recycling, reuse and remanufacturing will become more important as the population increases.
5. Human populations import materials, making it difficult to estimate the carrying capacity of an area.
The number of individuals a given area of land or water can sustainably support over time.
The carrying capacity for humans is the inverse of the ecological footprint.
Limiting factors are factors or resources that limit the size of a population.
The population cannot grow larger because of too much or too little of a factor.
Food, water, nesting sites, predation
K strategists tend to have a few offspring that receive a lot of parental care.
Examples: birds, elephants and humans
r Strategists tend to have many offspring with no parental care.
Ex: spiders, fish
1. Lag phase
2. Exponential Growth (Rapid Growth)
3. Stable phase
- Paul Ehrlich
Author of The Population Bomb
Lifestyles affect resource use and requirements
Technological developments cause changes in resource requirements and consumption
The range of resources used by humans is much greater than any other species.
When one resource becomes limiting, humans substitute another.
Human carrying capacity is determined by:
1) the rate of energy and material consumption
2) the level of pollution
3) the extent of human interference in global life-support systems…