Population Dynamics

Bellringer (10min)

1)Why did China establish its “One Child Policy”? 2)Since China has decided to end its “one Child Policy” what is likely to happen to the population size in china?

Population Dynamics Write only what is in RED

Population: all the individuals of a species that live together in an area

Input Three Key Features of Populations Size: # of individuals in an area Density: measurement of population per unit area Dispersion: spacing relative to each other (clumped, even/uniform, random) Although several species may share a habitat they each have their own niche. A niche is a very narrow range where a species fits within a habitat.

Three Key Features of Populations Growth Rate = Birth Rate (natality) - Death Rate (mortality) How many individuals are born vs. how many die Birth rate (b) − death rate (d) = rate of natural increase (r). Although several species may share a habitat they each have their own niche. A niche is a very narrow range where a species fits within a habitat.

POST-REPRODUCTIVE REPRODUCTIVE PRE-REPRODUCTIVE

You decide!

4 Factors that affect density 1. Immigration- movement of individuals into a population 2. Emigration- movement of individuals out of a population 1)Immigration: Moving in 2)Emigration: Moving out

4 Factors that affect density 3. Density-dependent factors- Biotic factors that have an increasing effect as population size increases   Ex. disease competition parasites

4 Factors that affect density 4. Density-independent factors- Abiotic factors that affect populations regardless of their density   Ex. temperature storms habitat destruction drought

Factors That Affect Future Population Growth Immigration + + - Population Mortality Natality - Emigration

Three Key Features of Populations 3. Dispersion: describes their spacing relative to each other clumped even or uniform random Although several species may share a habitat they each have their own niche. A niche is a very narrow range where a species fits within a habitat.

clumped even (uniform) random Although several species may share a habitat they each have their own niche. A niche is a very narrow range where a species fits within a habitat. random

Population Dispersion

Other factors that affect population growth Limiting factor- any biotic or abiotic factor that restricts the existence of organisms in a specific environment. EX.- Amount of water Amount of food Temperature

Limiting Factor- Zone of Tolerance Few organisms present None Few organisms present None Many organisms present Although several species may share a habitat they each have their own niche. A niche is a very narrow range where a species fits within a habitat.

Other factors that affect population growth Carrying Capacity- the maximum population size that can be supported by the available resources There can only be as many organisms as the environmental resources can support Although several species may share a habitat they each have their own niche. A niche is a very narrow range where a species fits within a habitat.

Growth Exponential Growth: Increase in number or size, at a constantly growing rate (J shaped curve). Logistic Growth: Levels off when the carrying capacity is reached (S shaped curve).

J-shaped curve (exponential growth) DRAW AND LABEL: N u m b e r J-shaped curve (exponential growth) Carrying Capacity (k) S-shaped curve (logistic growth) Ok so Time

Human Population Growth

Human Population Growth

Output In your notebook, graph the data below: Year 2007 2008 2009 2010 Deer population 1986 2200 1850 1450 Panther population 192 212 200 160 What should the x-axis be? What should the y-axis be? What should the scale of the y-axis be? How should you plot the points? What should the x-axis be? Time in years What should the y-axis be? Number of panthers (right side) and Number of deers(left side). What should the scale of the y-axis be? 600s deer, 50s panther. How should you plot the points? Determine the (x, y) coordinate using the year (x) and the # of panthers (y) and placing a dot at that point 26

What should the x-axis be? Time in years What should the y-axis be? Number of panthers (right side) and Number of deers(left side). What should the scale of the y-axis be? 600s deer, 50s panther. How should you plot the points? Determine the (x, y) coordinate using the year (x) and the # of panthers (y) and placing a dot at that point 27

We Do (25min) Remain in your assigned lab station! Walking around results in a grade of F!!! Work diligently on your reading assignment. Unfinished work will NOT be homework. NO CELLPHONES, if caught using a phone student’s score will be lowered by 1 letter grade. Raise your hand once you have reached the Independent Practice section.

Independent Practice (15min) Voice Level: SILENT If talking points will be deducted from student’s grade. Work independently and diligently to finish your Independent Practice. Raise your hand if you have a question or have finished your work.

Exit Ticket (15min) Voice Level: SILENT If talking points will be deducted from student’s grade. Once finished, raise your hand to inform your instructor.