Sarah W Fitzpatrick

@SarahFitz

Assistant Prof at Kellogg Biological Station, MSU. Thinking about evolution and conservation in small populations. she/her

Vrijeme pridruživanja: svibanj 2012.

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  1. proslijedio/la je Tweet
    prije 9 sati

    Postdoc on rattlesnake conservation genomics in my lab. Explore interaction between adaptive variation and drift in small populations and develop your own projects! See for details… Please RT.

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  2. proslijedio/la je Tweet
    22. sij

    Sit down with a beverage of your choice & read 's amazing piece. It'll take time to read and process but so worth it. My immediate takeaways: relief at someone articulating my uneasiness w/ ED&I this year. (1/3)

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  3. proslijedio/la je Tweet
    23. sij

    Are you a finishing grad student or early postdoc interested in speciation genetics? What could be better than this excellent opportunity in the lab? (Spoiler: the answer is "nothing".)

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  4. proslijedio/la je Tweet
    11. sij

    When your undergrad advisor, your PhD advisor and your committee member for both programs are great people, great scientists, and great friends!

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  5. proslijedio/la je Tweet
    10. sij

    New study from researchers: Genetic rescue warrants consideration as a possible conservation measure for small, fragmented populations

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  6. 2. sij

    10/n Extremely grateful to my collaborators and mentors LM Angeloni and the many field and lab assistants, labmates, and colleagues who helped w/ this over the years.

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  7. 2. sij

    9/n These results agree with an expanding understanding of when & how gene flow can increase fitness. Given rates of fragmentation and environmental change, gene flow may be an increasingly crucial source of variation for populations to keep pace and avoid extinction.

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  8. 2. sij

    8/n This was cool bc contrary to the prediction that small populations are especially vulnerable to genomic swamping, we showed portions of the recipient genome were maintained, suggesting genetic load can be reduced without losing potentially important adaptive variation.

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  9. 2. sij

    7/n used simulations based on RADseq data from before and after gene flow to test whether alleles associated with the local environment were maintained in the face of high gene flow. Candidate adaptive loci resisted introgression by more than neutral expectations.

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  10. 2. sij

    6/n We used microsats to assign genetic ancestry to each fish & build wild pedigrees spanning 6 generations. built models testing if fitness (survival & lifetime reproduction) varied by ancestry. Hybrids tended to live longer and produce more offspring.

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  11. 2. sij

    5/n Just realized I've spent 1/3 of my life working on this project.

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  12. 2. sij

    4/n Eleven(!) years ago L Angeloni & I began an intensive mark-recapture study spanning 29 months, two streams, and 9,590 individually marked guppies. We had tons of help, thank you. Population abundances increased by nearly 10X their original size.

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  13. 2. sij

    3/n We took advantage of experimental translocations of guppies in Trinidad to study the effects of new gene flow from an originally adaptively differentiated population into two small and native headwater populations that were previously isolated from gene flow.

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  14. 2. sij

    2/n Despite accumulating experimental evidence for positive fitness effects of gene flow and a few iconic examples of GR in conservation (eg, Florida panthers), assisted gene flow is not widely used in wildlife management - in part bc there is still so much uncertainty and risk.

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  15. 2. sij

    1/n The evolutionary role of gene flow has been classically debated, a common perspective focuses on homogenization & constraints on local adaptation. But, a surge of recent evidence for genetic rescue suggests gene flow often provides fitness benefits to small populations.

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  16. 2. sij

    Fun to start 2020 with this! Awesome collab with LM Angeloni . Wild pedigrees & genomics showed genetic rescue in wild guppy populations w/out swamping local environment-associated SNPs. (summary below)

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  17. proslijedio/la je Tweet
    2. sij

    Come hear me talk at about lake-stream divergence and genomics of a unique lake population of rainbow darters! I'll be talking on Sunday (Jan. 5th) at 11am in room 205

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  18. 13. pro 2019.
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  19. proslijedio/la je Tweet
    10. pro 2019.

    Does gene flow yield benefits beyond individual fitness? With the help of scores of tattooed guppies, and now have a clearer idea:

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  20. 2. pro 2019.

    What are longterm effects of ? We found that small populations with previous gene flow grew larger in high resource environments than those w/out. Evolutionary history did not scale to the ecosystem. Led by

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