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Comparing Populations
Today’s Objectiveslong-term data sets
• Become familiar with exploring
• Test hypotheses
• Understand the benefits & limitations
Schedule
• Background on long-term data sets
• MSU Museum– Tour & Presentation
• Test given hypothesis using long-term data set
• Groups develop new hypothesis and test
Long-term data sets
• Scope global to organismal
• Time period centuries to years
• Benefits Broad patterns
large sample size
• Limitations Time, money, organization
Global Long-term data setsAtmospheric carbon dioxide
Remote sensing
Global Long-term data sets Ice and Glaciers
Global Long-term data sets Sea levels
Global Long-term data sets Sea surface temperatures
Global Long-term data sets Deforestation in Brazil
Ecosystem level Appalachian Mountains
Community level Kellogg Biological Station, MI
All occurrence sampling of known individuals; study behavioral ecology
Mara hyena project (1988-present)Organismal level
MSU: Holekamp Research Group
Kluane National Park, Yukon Canada
- Follow individualsthroughout life- 23 years data- 6000+ individuals in pedigree.
BehaviorEcologyEnergeticsEvolution
Organismal level
MSU/Guelph: McAdams Research Group
Long Term Ecological Research
Established in 1980 for long term ecological processes in the US– Primary production– Population Studies– Disturbance Patterns
• www.lternet.edu• www.lter.kbs.msu.edu
Video: http://www.lternet.edu/ltervideo/?size=full
Dreaming of summer?Dreaming of summer?
WWW.KBS.MSU.EDU
Build Your Career @ KBS:
• MSU Summer Classes
• Internships & Undergraduate Research
WWW.KBS.MSU.EDU
Summer Classes in Field Biology
Maximum Class size of 16!Maximum Class size of 16!
All classes include a hands-on research component
2010 Summer Classes include:
•ZOL 355/355L•PLB 418•ZOL 440
WWW.KBS.MSU.EDU
Learn and InternA program ONLY for MSU students that
combines a course at KBS with a part-time
internship.
$3500 scholarship/stipend!
Get course Get course credit AND build credit AND build
your resume!your resume!WWW.KBS.MSU.EDU
WWW.KBS.MSU.EDU
65 miles from main campus (near Battle Creek)
Kellogg Biological
Station
Interested in animal behavior research?
Join the Boughman Lab!
We need undergraduate assistants to help with our research projects this spring and summer
At Museum
Purpose: get exposure to museum collections that inform long-term data research
• ½ class takes tour of collections
• ½ class gets presentation on long-term data sets
• Groups swap
To the museum!
• Bring:– Coursepack pages– Paper, writing utensil– Jacket
Peromyscus maniculatus (deer mouse)
• Mostly nocturnal
• Breed all year, peak April-August
• Food for snakes, owls and weasels
• Females very territorial
Our exploration of long-term data sets
Peromyscus Sex Ratio
• Sex ratio # males: # females
Expected is 50% males: 50% females
• Why might sex ratio differ from expected?
We’ll start by exploring sex ratio in Michigan.
Collecting Data - MaNIS
• Follow directions in coursepack
• Demo
• http://www.screencast.com/users/acrlackey/folders/Jing/media/75fa3fae-422e-4f93-a227-07fc8b5f7269
Collect data from MaNIS
Once groups have their data,
I’ll show you how to analyze it
using a Pivot Table
Pivot Tables
What?
• Summarize and analyze large amounts of data in a list or table – (regardless of how you have it organized in
your sheet)
– For instance…
Create a PivotTable
• Choose– Microsoft Office Excel list or database
• Select your data range– Easy method is click on the upper left hand
corner, hold shift key and click on the lower right hand corner.
• Choose the output location– New Worksheet
Choosing the categories• Drag the categories to be either rows or
columns.– Don’t worry, play around
Sex Ratio in Michigan
• Each group examines sex ratio (males:females) in Michigan
• Test difference between observed sex ratio and expected ratio using Chi-square (Demo website calculator)
• Observed values come from Pivot Table
• 1st set of Q/H/P• Chi-square table• Chi-square value, p-value• Stat conclusion• Biol conclusion
• 2nd set of Q/H/P• Pick anything.• Need ideas? Think about subspecies, age class,
latitude or month.
Assignment
Next Week
• Behavior lab #3
• Pages 17-28