Populations Characterized by: Geographic distribution Density Growth Rate Births Deaths Movement (Immigration/Emigration)

Concept Map Population Growth Logistic Exponential growth Limits on Section 5-1 Population Growth can be Exponential growth Logistic characterized by represented by characterized by represented by Falling growth rate S-shaped curve Limits on growth No limits on J-shaped Constant Unlimited resources which cause a Go to Section:

Exponential Growth Ideal conditions: Unlimited resources

Logistic Growth As resources become less available, growth slows or stops Carrying capacity

Figure 5-4 Logistic Growth of Yeast Population Section 5-1 Carrying capacity Number of Yeast Cells Time (hours) Go to Section:

Limiting Factors Limiting Factors: Density-Dependent Density-Independent

Density-Dependent Limiting Factors Competition Predation Parasitism Disease

Density-Independent Limiting Factors Unusual weather Natural disasters Seasonal cycles Human activities

Concept Map Human Activities Section 6-1 Hunting and gathering that have changed the biosphere include Hunting and gathering Agriculture Industrial growth Urban development may have once caused often relies on the methods of the have resulted in Extinctions of large animals Green revolution High standard of living Increased pollution which increased Food supply Pesticide use Monoculture use Go to Section:

Human Impacts on Stability of Ecosystems Figure 6-22 Ecosystem Services Human Impacts on Stability of Ecosystems Section 6-4 Solar energy Production of oxygen Storage and recycling of nutrients Regulation of climate Purification of water and air Storage and distribution of fresh water Food production Nursery habits for wildlife Detoxification of human and industrial waste Natural pest and disease control Management of soil erosion and runoff Go to Section: