3 4 population. 2 1 populations: distribution 5 populations: abundance (including density)
TRANSCRIPT
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POPULATION
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POPULATIONS: Distribution
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5 POPULATIONS: Abundance (including Density)
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POPULATIONS: Dispersal
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POPULATIONS: Age Structure
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Populations: Age Structure
White Oak
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Populations: Age Structure
Fremont Cottonwood
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Age Structure: Large Cactus Finch
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Population Age Structure: Survivorship (lx)
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Population Age Structure: Reproduction
R0: Net Reproductive RateT: Generation Time
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Population Age Structure: Growth Rates
= Geometric Rate of Increase r = Per Capita Rate of Increase
> 1 : Increasing< 1: Decreasing
Non-Overlapping Reproduction Continuous Reproduction
r > 0: Increasingr < 0: Decreasing
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Patterns of Survivorships
Fig. 10-18 in Molles 2006
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Fig. 10-14 in Molles 2006
Type I Survivorship Curve
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10Fig. 10-16 in Molles 2006
Type II Survivorship Curve
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Beeplant (Cleome)
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Fig. 10-17 in Molles 2006
Type III Survivorship Curve
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Collecting Data for Analyzing Age Structure: Cohort Life Table Analysis
Cohort: All individuals born at the same time
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Cohort Lifetable: Monitor all individuals born in a given year until their death
Age (Years) Number of Survivors 0-1 1,000 1-2 800 2-3 640 3-4 500 4-5 380 5-6 152 6-7 60
Cohort: A group of individuals of the same age
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Problems with Cohort Life Tables?
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Adolph Murie
Collecting Data for Survivorship Curves II: Static Life Table Analysis
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Static Life Table Collect age data on individuals at time of death
Fig. 10.14 in Molles 2006
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Fig. 10-14 in Molles 2006
Survivorship Curve for Dall Sheep(Based on Static Life Table Analysis)
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Assumption of Static Life Table Analysis:
Proportion of skulls in each age class
Proportion of individuals who diein each age class
=
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Table 10.2 in Molles 2006(continued)
Combining Life Tables with Fecundity Schedules(Continuous Reproduction)
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Useful Life Table Notation
mx: Number of individuals produced per individualduring time period x
x: Age in years
nx: Number of individuals surviving to beginning of x
lx: Proportion of original individuals surviving to beginning of x
dx: Number of individuals dead in a given time interval
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Indices of Population Growth
Ro: Net Reproductive Rate(Animals: Total # females produced per female in one lifetime)(Ro < 1, population size is decreasing)(Ro = 1, population size is not changing)(Ro > 1, population size is increasing)
Ro = ∑ lxmx
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T: Generation Time
(Mean age of a Female when Giving Birth)
Indices of Population Growth
T = ∑ x lx mx
__________
Ro
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r: Per Capita Rate of Increase(= birth rate – death rate)
(If r < 0, population is decreasing)(If r = 0, population is not changing)(If r > 0, population is increasing)
Indices of Population Growth
r = ln Ro_______
T
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Common Mud Turtle (K. subrubrum)
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Table 10.2 in Molles 2006(continued)
r = ln Ro_______
T
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1 http://www.desertusa.com/mag05/nov/images/no4creosote.jpg
2 http://www.swsbm.com/Maps/Larrea_tridentata.gif
3 http://www.sourcepointherbs.org/larrea.JPG
4 http://www.texasbeyondhistory.net/waxcamps/images/creosote-lg.jpg
5 http://www.mobot.org/jwcross/duckweed/graphics/frog_in_ duckweed.gif
6 http://canalphotos.org/8-28_canal_duckweed_2_PS_rz.jpg7 http://www.highmars.org/niac/images/dweed02.jpg
8 http://abell.as.arizona.edu/~hill/4x4/gila104.gif
9 http://www.science.smith.edu/stopoverbirds/birdpixs/images/ American%20Robin.jpg
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10 http://sdakotabirds.com/species/photos/white_crowned_sparrow.jpg
11 http://www.boxerwood.com/PHOTO%20TOUR/images/ julyblooming/cleome.jpg
12 http://www.princewilliamsoundcruises.com/images/dall-sheep.jpg
13 http://www.ci.el-paso.tx.us/green_infrastructure/_images/image1b.jpg
14 http://www.texas-hunts.com/Armenian%20Red%20Sheep%201.JPG
15 http://www.bucktrack.com/Alaska_Brooks_Range_Traverse/Photos/ Dall_Sheep_Skull.jpg
16 http://www.atpm.com/10.11/ireland/images/glendalough-cemetary-420.jpg
17 http://www.igallopon.com/images/2006/54/t4.jpg
18 http://www.v-liz.com/galapagos/espanola/gardne~1/finch1.jpg
19 http://www.hiltonpond.org/images/TurtleMudAnterior01.jpg