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United States (324,047)
BioCore (33)
BCOR 102 (7)
Lecture

Life History Traits/ r & k selection

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Department
BioCore
Course
BCOR 102
Professor
Nicholas J.Gotelli
Semester
Fall

Description
 Cole’s paradox o ( ) ( ) o Semelparous reproduction is efficient if the conditions are constant but iteroparity is a bet hedging strategy to ensure offspring survival in a variable environment  r vs. k selection o density is the driving force of both mechanisms r-selection k-selection Density (generation time) Low High Competition ability Low High Development Fast Slow Body size Small Large Reproduction Early, semelparous Late, iteroparous Juvenile survival rate Low, type III curve High, type I curve r high Low Example species dandelion Blue whale Over time species will evolve these sets of traits in response to crowding  Solbrig experiment (Dandelions) habitat density genotype Conditions planted surviving r(traffickedpath Low A- 90% Sandy, high A:B, 50:50 10:20 by light,
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