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Population Dispersion Patterns: Factors and Explanations

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Introduction to Ecology

  • Levels of Ecological Study
    05:01
  • Introduction to Ecology Example 1
    02:31
  • Environment vs. Habitat vs. Niche
    01:57

Introduction to Population Ecology

  • Factors Affecting Population Size (N)
    01:48
  • Population Size & Density
    01:52
  • Introduction to Population Ecology Example 3
    01:51

Population Sampling Methods

  • Sampling Mobile Organisms: Mark & Recapture
    03:12
  • Population Sampling Methods Example 1
    01:54
  • Sampling Stationary Organisms: Transects & Quadrats
    02:31

Life History

  • Life History
    04:01
  • Life History: Population Reproductive Strategies
    02:51
  • Life History Example 1
    02:46

Population Demography

  • Life Tables
    03:49
  • Population Demography Example 1
    02:18
  • Survivorship Curves
    02:54

Factors Limiting Population Growth

  • Density-Dependent Factors
    02:37
  • Factors Limiting Population Growth
    00:51
  • Density-Dependent vs. Density-Independent Factors
    03:14

Introduction to Population Growth Models

  • Introduction to Population Growth Models Example 3
    02:52
  • Introduction to Population Growth Models
    01:09
  • Assumptions of Population Growth Models
    03:29

Exponential Population Growth

  • Exponential Population Growth Example 2
    07:34
  • Exponential Population Growth
    03:05
  • Exponential Population Growth Equations
    06:35

Logistic Population Growth

  • Summary of Key Features & Assumptions for Each Population Growth Model
    07:28
  • Logistic Growth in a Limited Environment
    05:00
  • Logistic Population Growth Example 1
    04:28

Introduction to Community Ecology

  • Introduction to Community Ecology
    02:03

Introduction to Community Interactions

  • Overview: Types of Community Interactions
    02:55
  • Introduction to Community Interactions Example 1
    02:23
  • Introduction to Community Interactions
    01:57

Community Interactions: Competition (-/-)

  • Resource Partitioning (Partial Niche Overlap)
    03:57
  • Competitive Exclusion Principle (Complete Niche Overlap)
    04:23
  • Community Interactions: Competition (-/-) Example 1
    04:23

Community Interactions: Exploitation (+/-)

  • 1) Exploitation (+/-): Predation
    01:42
  • 3) Exploitation (+/-): Parasitism
    02:37
  • Community Interactions: Exploitation (+/–)
    00:49

Community Interactions: Mutualism (+/+) & Commensalism (+/0)

  • Positive Interactions
    02:56
  • Summary of Community Interactions
    01:52

Community Structure

  • Community Structure Example 3
    02:22
  • Community Structure Example 1
    03:37
  • Community Structure
    04:25

Community Dynamics

  • Disturbances Make Communities Dynamic
    03:37
  • Secondary Ecological Succession
    02:31
  • Effects of Early-Arriving Species on Late-Arriving Species
    01:34

Energy Flow Through Ecosystems

  • Gross Productive Energy vs. Assimilated Energy
    05:28
  • Energy Efficiency in Ecosystems
    06:28
  • Energy Flow Through Ecosystems Example 2
    07:07

Energy & Biomass Pyramids

  • Energy & Biomass Pyramids
    05:41
  • Energy & Biomass Pyramids Example 1
    03:41

Biogeochemical Cycles

  • Biogeochemical Cycles Example 2
    02:40
  • Carbon Cycle
    04:20
  • Nitrogen Cycle
    08:32