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projects

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Projects

Manuscript Sebastian

List of Figures:

  • Fig. 1: selection coefficient
  • Fig. 2: first step, no correlation, alpha_1 bar as function of gamma
  • Fig. 3: first step, no correlation, alpha_1 bar as function of n (complexity)
  • Fig. 4: first step, no correlation, histograms
  • Fig. 6: first step, no correlation, heat plot
  • Fig. 7: selectional correlation, all steps, alpha_1 bar
  • Fig. 8: selectional correlation, all steps, rho_alpha
  • Fig. 9: selectional correlation, first step, heat plot and histograms
  • Fig. 10: selectional correlation, fitness gradient
  • Fig. 11: selectional correlation, diving kite
  • Fig. 11a: selectional correlation, time series, flying kite
  • Fig. 12: mutational correlation, all steps, various measures, n = 2
  • Fig. 12: mutational correlation, all steps, various measures, n = 3
  • Fig. 14: mutational correlation, first step, heat plots
  • Fig. 15: mutational correlation, time series, flying kite
  • Fig. 16: mutational and selective correlation, rho_alpha

Project extinction risk

Ideas (25 Jan 2013):

  • Deadline is April 2!
  • Main topic is climate change, adaptation, and plasticity, not necessarily evolutionary rescue
  • Unclear to what degree the article will be a review or a modeling paper
  • Need to read up recent reviews, especially Chevin
  • One idea: explain assumptions behind and consequences of Bürger & Lynch model

Moving optimum model

  • Key idea: Calculate evolutionary rates in haldanes;
    • choose reasonable set of genetic parameters
    • focus on varying ecological parameters (N, B, v, omega, theta)
  • Preliminary observations in small populations
    • Rates of evolution generally increase as the optimum pulls away
    • Genetic variances stay high until just before extinction; may even reach a big shortly before extinction
    • Initial rate of evolution low even with strong selection? Requires analysis of allele frequencies (→ standing variation project)
  • To do: find way to compactly visualize evolutionary rates
    • over which time window?
    • haldanes calculates over which interval?

Potential topics

  • Focus on evolutionary rates might be justified, since models tend to be dynamic
  • Phenotypic adaptation by genetic evolution: all of quantitative genetics:-), starting with breeders/Lande equation
  • Evolution of plasticity: been reviewed several times
  • Evolutionary rates: Andrew should know all about those
  • Maybe here our simulations fit in
  • Evolutionary rescue: note exactly the topic
  • Evolutionary rescue and plasticity: Good review in Chevin et al. 2012
  • Plasticity facilitates genetic adaptation: West-Eberhard etc., some more concrete models showing this to be the case
  • Something about the expected contribution from genetics and plasticity? Is this possible? (Ghalambor 2007)
  • Different kinds of environmental change (sudden, moving, fluctuating; kinds of noise)
  • Plasticity vs. tolerance
  • Constraints and limits to adaptive evolution
  • Costs and limits of plasticity
  • Evolvability ↔ environmental variability

Potential PhD project on speciation

Interesting topics:

  • parapatric speciation
  • female preferences
  • genomic islands
  • mixed geographic modes
  • interaction between magic and non-magic traits (see van Doorn and Weissing 2004)
  • plasticity

Sources of inspiration:

  • List of questions in Nosil book
  • Butlin et al review
  • To some degree Smadja and Butlin review

Potential topic: Phenotypic plasticity and speciation

  • Reviews: Pfennig et al. 2010, Fitzpatrick 2012, Minelli & Fusco 2012
  • Start with more specific review about classification of scenarios and links to theory (complementary to Pfennig et al. 2010)? – Focus on evolution of RI; classify according to types of plasticity, type of plastic traits, …
  • Make a list of proposed theoretical scenarios
    • The clearest concepts seem to the developmental plasticity hypothesis of speciation and the flexible stem hypothesis for adaptive radiations
  • Make a list of proposed empirical examples
    • arctic charr
    • cichlids
    • sticklebacks?
    • tiger salamanders?
    • examples from WE book
  • Use Thibert-Plante and Hendry (2011) as starting point (see my review on it), but focus more on evolution of female preferences? (Or use assortative mating instead?)
  • Some potential model ingredients/variants:
    • female preference vs. assortative mating
    • automatic vs. classic plastic magic trait
    • linear reaction norm vs. threshold characters
    • geographic setting (but two-island model seems the most natural choice)
    • counter-gradient variation (non-adaptive plasticity)?
  • Try to model the arctic charr scenario?
  • See list of questions in Fitzpatrick 2012
  • Use Draghi and Whitlock approach to model plasticity?
  • Plastic magic traits…
  • Key question: Interaction between evolution of non-random mating and genetic assimilation
  • Interaction between evolution of plastic and non-plastic barriers?

Comments on Adrianna's manuscript

  • Is this a critique of W-E's theory of speciation, or rather of her theory phenotypic evolution per se?
  • Describe the DPHS in more details (as in Pfennig et al. 2010, Fitzpatrick 2012)?