Populations

Population Dynamics AP Environmental Science Chapter 9, 12 & 13

Characteristics of a Population ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Population Size ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Population Density ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Population Dispersion Population dispersion is the spatial pattern of distribution There are three main classifications Clumped : individuals are lumped into groups ex. Flocking birds or herbivore herds due to resources that are clumped or social interactions most common http://www.johndarm.clara.net/galleryphots/

Population Dispersion http://www.calflora.net/bloomingplants/creosotebush2.html ,[object Object],www.agry.purdue.edu/turf/ tips/2002/clover611.htm Random : Individuals are randomly dispersed in the environment ex. Dandelions due to random distribution of resources in the environment, and neither positive nor negative interaction between individuals rare because these conditions are rarely met

Age Structure ,[object Object],[object Object],[object Object]

Age Structure Diagrams Positive Growth Zero Growth Negative Growth (ZPG) Pyramid Shape Vertical Edges Inverted Pyramid

[object Object],[object Object],[object Object],[object Object]

Biotic Potential ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Environmental Resistance ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Population Growth ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Population Growth ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Exponential Growth One female will produce 6 young over her 100 year life span. In a population, this amounts to a growth rate of 2% How many elephants could result from one male and one female after 750 years? 19,000,000 elephants!!!

Carrying Capacity ,[object Object],[object Object]

Carrying Capacity (K) ,[object Object],[object Object]

Logistic Growth ,[object Object],[object Object],[object Object],[object Object]

Population Growth ,[object Object],[object Object]

Reproductive Strategies ,[object Object],[object Object],[object Object],[object Object]

r - Strategists ,[object Object],[object Object],[object Object],K

R Strategists ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

K - Strategists ,[object Object],[object Object],K

K- Strategist ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Survivorship Curves ,[object Object],[object Object],[object Object]

Conservation Biology ,[object Object],[object Object],[object Object]

Conservation Biology ,[object Object],[object Object],[object Object],[object Object]

Habitat Fragmentation ,[object Object],[object Object],[object Object]

1949 1964 Habitat fragmentation in northern Alberta 1982 1991

Human Impacts ,[object Object],[object Object],[object Object],[object Object]

Human Impacts ,[object Object],[object Object],[object Object]

Working with Nature ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Basic Ecological Lessons ,[object Object],[object Object],[object Object],[object Object]

Four Principles for Sustainability ,[object Object],[object Object],[object Object],[object Object]

Populations

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