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Dr. Nicolas M Alexandre Profile
Dr. Nicolas M Alexandre

@NicMAlexandre

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Population/Comparative genomicist at Colossal Biosciences. Former UCSC postdoc, UC Berkeley PhD

Dallas, Texas
Joined July 2019
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@NicMAlexandre
Dr. Nicolas M Alexandre
8 days
RT @dianaguilr: Check out our paper @PNASNews Special Feature that published today: We show how translocating Texa….
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@NicMAlexandre
Dr. Nicolas M Alexandre
2 months
RT @dianaguilr: Our research in Popular Science.
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@NicMAlexandre
Dr. Nicolas M Alexandre
2 months
RT @TJNear: Congratulations @ChaseBrownstein for winning the Society for the Study of Evolution Presidents' Award for Outstanding Dissertat….
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@NicMAlexandre
Dr. Nicolas M Alexandre
2 months
RT @MDSvantePaabo: @colossal @mashable The rediscovery of the "little dodo" represents a significant milestone in conservation efforts. Uti….
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@NicMAlexandre
Dr. Nicolas M Alexandre
2 months
RT @EmilyCarr42: The first chapter of my dissertation is out! . Repeated and widespread evolution of biofluorescence in marine fishes.@Karl….
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@NicMAlexandre
Dr. Nicolas M Alexandre
3 months
RT @NewsfromScience: The beaks of Anna’s hummingbirds have grown longer and larger, and their ranges have expanded to follow the feeders. h….
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science.org
Beaks have grown longer and larger, and ranges have expanded to follow the feeders
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@NicMAlexandre
Dr. Nicolas M Alexandre
3 months
Take a look at @ScienceMagazine's article describing our work in @GlobalChangeBio showing that beak morphology of hummingbirds has changed in association with feeders!.
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science.org
Beaks have grown longer and larger, and ranges have expanded to follow the feeders
@NicMAlexandre
Dr. Nicolas M Alexandre
3 months
🚨New paper alert!🚨.We show that hummingbird beaks have changed in shape & size since around WWII, driven by the rise of commercialized feeders! 🧵.📄 Paper: #ornithology #evolution #GlobalChangeBiology.
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@NicMAlexandre
Dr. Nicolas M Alexandre
3 months
@fayegromero @zoemig @ecophysicslab @cj_battey Finally I wanted to thank the @MVZUCB (Shoutout to curator Carla Cicero), the U.S. Census, Christmas Bird Count, PRISM Climate Group, and for the resources that have been made available.
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newspapers.com
The largest online newspaper archive. Used by millions every month for historical research, family history, crime investigations, journalism, and more.
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@NicMAlexandre
Dr. Nicolas M Alexandre
3 months
@fayegromero @zoemig @ecophysicslab @cj_battey I also want to thank our fearless mentor, Prof. Alejo Rico-Guevara @ecophysicslab who has kept the passion alive throughout. And thank you to the best co-leads authors ever, PhD students Simon English and Faye Romero @fayegromero who made this process fun!.
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@NicMAlexandre
Dr. Nicolas M Alexandre
3 months
@fayegromero @zoemig @ecophysicslab We are so grateful to Prof. Laura Stein for her advice on modeling, and to @cj_battey for his help with data acquisition and analysis. We are indebted to Grieg et al. & @cj_battey et al. for their foundational work that inspired this project.
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@NicMAlexandre
Dr. Nicolas M Alexandre
3 months
@fayegromero @zoemig @ecophysicslab Huge thanks to undergrads who made this work possible: Timothy Barnes, Audrey E. Smith, Saron Akalu, Haarini Sridhar, Gillian Montross & Ezra Collins.👏👏.
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@NicMAlexandre
Dr. Nicolas M Alexandre
3 months
@fayegromero @zoemig @ecophysicslab To test this, Prof. Don Powers showed hummingbirds actively heat their beaks after flight. Turns out, the bill helps dissipate heatduring perching! 🔥➡️💨
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@NicMAlexandre
Dr. Nicolas M Alexandre
3 months
@fayegromero @zoemig @ecophysicslab But climate matters too. Using PRISM data, we found that in cooler areas in the north, beaks are shorter, smaller, and deeper, consistent with thermoregulation theory. ❄️☀️.
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@NicMAlexandre
Dr. Nicolas M Alexandre
3 months
@fayegromero Collaborating with Prof. @zoemig , Prof. @ecophysicslab , Felipe Garzón-Agudelo & Kevin Epperly, we used 2D & 3D shape data to show:.Beaks are getting more slender, tapered, and in males, pointier! 🐦
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@NicMAlexandre
Dr. Nicolas M Alexandre
3 months
Co-first author @fayegromero and I modelled billchanges of Anna’s hummingbirds in the Museum of Vertebrate Zoology’s collection (dating to 1860). 📏.We found bill length and maxillary surface area increased with feeder density.
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@NicMAlexandre
Dr. Nicolas M Alexandre
3 months
Co-first author Simon English then showed that feeder abundance was the best predictor of Anna’s hummingbird population growth, especially in the north, where Grieg et al. showed that birds rely more on feeders.
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@NicMAlexandre
Dr. Nicolas M Alexandre
3 months
It started with newspaper archives 📜:.Prof. Eliza Grames tracked hummingbird feeder mentions by county in California from 1860 on. She found feeder use rose rapidly, especially from southern to northern CA.
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@NicMAlexandre
Dr. Nicolas M Alexandre
3 months
🚨New paper alert!🚨.We show that hummingbird beaks have changed in shape & size since around WWII, driven by the rise of commercialized feeders! 🧵.📄 Paper: #ornithology #evolution #GlobalChangeBiology.
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onlinelibrary.wiley.com
Bird beaks are highly adaptable, with the potential to undergo rapid morphological shifts in response to environmental change such as climatic variation or food availability. Anna's Hummingbirds...
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@NicMAlexandre
Dr. Nicolas M Alexandre
3 months
We are pleased to announce the availability of a chromosome-scale genome assembly for the Nicobar Pigeon (Caloenas nicobarica)!!
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academic.oup.com
Abstract. The Nicobar pigeon (Caloenas nicobarica), the closest living relative of the extinct Dodo (Raphus cucullatus), is endemic to Southeast Asia with
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