The Biotic Components of Ecosystems

Contents

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The Living Parts of Ecosystems

Density and Distribution

Population Sampling

Population Sampling (continued)

Population Sampling (continued)

Population Sampling (continued)

Sampling Excersize

Simulated Real World Field Case

Population Sampling (continued)

Populations: Ranges, Habitats, and Territories

The Niche

The Niche (continued)

The Niche (continued)

The Niche (continued)

Principles of Population Ecology

Describing Populations -- Age Structure Diagrams

Describing Populations -- Age Structure Diagrams (continued)

Examples of Age Structure Using US and Kenya Human Populations

Fundamental Population Characteristics -- Survivorship

Some Attributes of Type 1 and Type 3 Species (continued)

More Attributes of Type 1 and Type 3 Species (continued)

Fundamental Population Characteristics -- Mortality

Life Table for a Typical Type 1 Species (Red Deer)

Mortality Curve for Red Deer

Population Growth

Exponential growth

Population Growth (continued)

Exponential Growth Limited by Carrying Capacity

Explanation of Growth Curves

Cautions About Population Theory and Growth Equations

The Interaction of Living Organisms in an Area

The Interaction of Living Organisms in an Area (continued)

How Communities are Organized

How Communities are Organized Natural Processes

How Communities are Organized Natural Processes

Competitive exclusion

Coexistence

Interspecific Competition -- Resource partitioning Animals

Interspecific Competition -- Resource partitioning Plants

Instability

Interspecific Competition -- Predator - Pray Relationships

Predation

Predation

Examples of Predator-Prey Systems

How Communities Change Over Time

How Communities Change Over Time (continued)

Disturbance (Fire)

Top Death - Roots Live

Bare Ground

Invasion

Establishment

Continued Development

Endpoint

Geography of U. S. Soils (Rough)

Altitude and Exposure Effects on Ecosystems