Szymek Drobniak
@szymekdr.bsky.social
evolution & ecology: colour, quant gen, meta-analysis, biostatistics | designer | writer+poet | R | sci comm+sciart | analog photography | birds 🦆🦉||UNSW Sydney & JU Kraków | he/him 🏳️🌈🇪🇺🇵🇱🇦🇺 szymekdr.wordpress.com Pubs: https://bit.ly/SzymekDrScholar
data structure (make sure your categorical data is sufficiently balanced and all categories are represented at the key intersection of predictors’ values); data complexity: collapse/merge levels if it’s reasonable to increase parameters identifiability.
October 11, 2025 at 10:08 PM
data structure (make sure your categorical data is sufficiently balanced and all categories are represented at the key intersection of predictors’ values); data complexity: collapse/merge levels if it’s reasonable to increase parameters identifiability.
unordered ordinal. Categorical data pose many challenges but they are as tractable with comparative methods as more well-behaved Gaussian models. The most important issues to keep in mind are: data availability (attempting to fit multinomial models with small datasets may lead to spurious results);
October 11, 2025 at 10:08 PM
unordered ordinal. Categorical data pose many challenges but they are as tractable with comparative methods as more well-behaved Gaussian models. The most important issues to keep in mind are: data availability (attempting to fit multinomial models with small datasets may lead to spurious results);
2025 #NobelPrize in physics for macroscopic quantum tunnelling phenomena in electric circuits :) suiting for the year of the centennial anniversary of quantum physics!
October 7, 2025 at 9:53 AM
2025 #NobelPrize in physics for macroscopic quantum tunnelling phenomena in electric circuits :) suiting for the year of the centennial anniversary of quantum physics!
The models are notably more complex but fittable with modern Bayesian GLMM routines. Think of them as looking at mean and scale (usually variance) evolution along the tree, here in an example of two concurrent Brownian Motion dynamics driving diversification of both variance and means.
October 2, 2025 at 3:26 PM
The models are notably more complex but fittable with modern Bayesian GLMM routines. Think of them as looking at mean and scale (usually variance) evolution along the tree, here in an example of two concurrent Brownian Motion dynamics driving diversification of both variance and means.
By extending the comparative model we can assay the evolutionary signal in evolvability itself and test a number of biologically interesting trait configurations (codivergence, contra-divergence, ceiling effects, phenotypic integrations and more!)
October 2, 2025 at 3:26 PM
By extending the comparative model we can assay the evolutionary signal in evolvability itself and test a number of biologically interesting trait configurations (codivergence, contra-divergence, ceiling effects, phenotypic integrations and more!)
Our newest paper is out in Methods in Ecol Evol @methodsinecoevol.bsky.social :) amazing team effort - we show that the traditional way of analyzing comparative data lacks finesse. besjournals.onlinelibrary.wiley.com/action/oidcS... w/ @itchyshin.bsky.social Yefeng Yang, Losia Lagisz & Ayumi Mizuno
October 2, 2025 at 3:26 PM
Our newest paper is out in Methods in Ecol Evol @methodsinecoevol.bsky.social :) amazing team effort - we show that the traditional way of analyzing comparative data lacks finesse. besjournals.onlinelibrary.wiley.com/action/oidcS... w/ @itchyshin.bsky.social Yefeng Yang, Losia Lagisz & Ayumi Mizuno
September 14, 2025 at 6:36 PM
I keep saying scientists are amazing artists and again this tuned out to be true :) the art corner at @eseb2025.bsky.social organised by @evokeproject.bsky.social went great, I’m thrilled to see all your amazing pieces! If you’re interested in discussing art&sci in science communication or would
August 22, 2025 at 7:44 AM
I keep saying scientists are amazing artists and again this tuned out to be true :) the art corner at @eseb2025.bsky.social organised by @evokeproject.bsky.social went great, I’m thrilled to see all your amazing pieces! If you’re interested in discussing art&sci in science communication or would
@eseb2025.bsky.social art corner goes well, it will be available throughout the conference. Join us, draw your science :) @evokeproject.bsky.social I get asked - what if I can’t draw? That’s even better! Trust me - your art will be more honest, and awesome. And we want to see it:)
August 19, 2025 at 9:05 PM
@eseb2025.bsky.social art corner goes well, it will be available throughout the conference. Join us, draw your science :) @evokeproject.bsky.social I get asked - what if I can’t draw? That’s even better! Trust me - your art will be more honest, and awesome. And we want to see it:)
At @eseb2025.bsky.social please go and visit the art corner organised by @evokeproject.bsky.social (6th Eseb art&sci corner!:)) It’s in the far back-right of the poster area. You don’t have to be an artist! No prior art knowledge required ;) just go there & draw/paint whatever portrays your science!
August 19, 2025 at 7:48 AM
At @eseb2025.bsky.social please go and visit the art corner organised by @evokeproject.bsky.social (6th Eseb art&sci corner!:)) It’s in the far back-right of the poster area. You don’t have to be an artist! No prior art knowledge required ;) just go there & draw/paint whatever portrays your science!
The art corner has been present at Eseb congresses since the 2015 Lausanne meeting, always receiving positive and lively feedback from all of you:) below some artworks from the Prague 2022 meeting. @eseb.bsky.social As always done with the amazing @evokeproject.bsky.social
August 17, 2025 at 9:21 PM
The art corner has been present at Eseb congresses since the 2015 Lausanne meeting, always receiving positive and lively feedback from all of you:) below some artworks from the Prague 2022 meeting. @eseb.bsky.social As always done with the amazing @evokeproject.bsky.social
So - on the roof of the Sistine Chapel, there’s a pair of gulls with a nestling they feed ;) the most famous gull couple in the world ;p #birdwatcherbelike #birdseverywhere #conclave #iseebirds Follow them here: www.youtube.com/watch?v=GbNe...
May 7, 2025 at 1:40 PM
So - on the roof of the Sistine Chapel, there’s a pair of gulls with a nestling they feed ;) the most famous gull couple in the world ;p #birdwatcherbelike #birdseverywhere #conclave #iseebirds Follow them here: www.youtube.com/watch?v=GbNe...
There’s no such thing as a boring common bird species ;) (today I’ve had a jay mimicking a kestrel, a starling pretending to be a black cap, and a song thrush that forgot its complex song and kept repeating just one weird phrase…)
April 20, 2025 at 9:13 AM
There’s no such thing as a boring common bird species ;) (today I’ve had a jay mimicking a kestrel, a starling pretending to be a black cap, and a song thrush that forgot its complex song and kept repeating just one weird phrase…)
And look at Merlin app. Just a couple of minutes of recording and the wonderful cacophony of bird voices splits into individual singers. I always repeat to my students that in order to be able to recognize rarities and be excited about unusual finds they first have to master the usual sounds around.
April 20, 2025 at 9:13 AM
And look at Merlin app. Just a couple of minutes of recording and the wonderful cacophony of bird voices splits into individual singers. I always repeat to my students that in order to be able to recognize rarities and be excited about unusual finds they first have to master the usual sounds around.
I love common species. I know rarities are the exciting ones but it’s the commonly seen ones that make up the backbone of our avian communities, both ecologically and acoustically. That is what I love checklists like this one, where after a short walk I have 21 species and counting :)
April 20, 2025 at 9:13 AM
I love common species. I know rarities are the exciting ones but it’s the commonly seen ones that make up the backbone of our avian communities, both ecologically and acoustically. That is what I love checklists like this one, where after a short walk I have 21 species and counting :)
The paper is also a nice example of a MA using proportion data, and approximate sampling error weights derived from the properties of sampling design in each of the extracted studies.
April 10, 2025 at 9:50 AM
The paper is also a nice example of a MA using proportion data, and approximate sampling error weights derived from the properties of sampling design in each of the extracted studies.
In our new preprint lead by @pietropollo.bsky.social we show how to use meta-analysis to compare not sample means but also kurtosis & skewness, as well as within-group covariance between multiple groups. The era of meta-analyzing whole distributions is here ecoevorxiv.org/repository/v...
April 1, 2025 at 5:35 AM
In our new preprint lead by @pietropollo.bsky.social we show how to use meta-analysis to compare not sample means but also kurtosis & skewness, as well as within-group covariance between multiple groups. The era of meta-analyzing whole distributions is here ecoevorxiv.org/repository/v...
an abundance of Chaffinches (last week just one sad male), Green/Gray-headed/Great spotted/Middle spotted/Lesser spotted Woodpeckers. Plus some nice species on the river (a Kingfisher’s blue bullet frantically commuting between boats anchored at the bank). I love proving to students that even
March 26, 2025 at 9:47 PM
an abundance of Chaffinches (last week just one sad male), Green/Gray-headed/Great spotted/Middle spotted/Lesser spotted Woodpeckers. Plus some nice species on the river (a Kingfisher’s blue bullet frantically commuting between boats anchored at the bank). I love proving to students that even
Seemingly fierce and terrifying, it's a perfect illustration of our study that paints a bleak and uneasy future for the worlds amphibians. Let me just recall a striking figure, showing a real explosion of heat-induced threat for tropical and temperate amphibians in some of their biodiv hotspots
March 26, 2025 at 7:20 PM
Seemingly fierce and terrifying, it's a perfect illustration of our study that paints a bleak and uneasy future for the worlds amphibians. Let me just recall a striking figure, showing a real explosion of heat-induced threat for tropical and temperate amphibians in some of their biodiv hotspots
The latest issue of @nature.com sports a charismatic cover image ooooof... A frog! :) our recent paper on amphibians and the ways global climate change is bound to affect them (www.nature.com/articles/s41...) found its way to the cover of Nature. 💜💚🐸
March 26, 2025 at 7:20 PM
The latest issue of @nature.com sports a charismatic cover image ooooof... A frog! :) our recent paper on amphibians and the ways global climate change is bound to affect them (www.nature.com/articles/s41...) found its way to the cover of Nature. 💜💚🐸
Winter thaw in the Carpathians. Plus bullfinches, crossbills, willow tits, first yellowhammers and song thrushes, and a cute three-toed woodpecker ;) Radziejowa (1260 meters) was a formidable opponent but who could resist her…
March 9, 2025 at 10:07 PM
Winter thaw in the Carpathians. Plus bullfinches, crossbills, willow tits, first yellowhammers and song thrushes, and a cute three-toed woodpecker ;) Radziejowa (1260 meters) was a formidable opponent but who could resist her…
What is also surprising - only in S Hemisphere the tropical amphibians are the most threatened (including the Amazon amphibian hotspot of biodiversity). In the North it’s the temperate species that will take the toll. Action is needed now!
March 5, 2025 at 4:44 PM
What is also surprising - only in S Hemisphere the tropical amphibians are the most threatened (including the Amazon amphibian hotspot of biodiversity). In the North it’s the temperate species that will take the toll. Action is needed now!
They suffer from overheating due to exposure to temperatures outside of their thermal safety margins. If global warming maintains its pace, by the end of the century 400 species may be directly threatened with extinction, regardless of access to water or shade.
March 5, 2025 at 4:44 PM
They suffer from overheating due to exposure to temperatures outside of their thermal safety margins. If global warming maintains its pace, by the end of the century 400 species may be directly threatened with extinction, regardless of access to water or shade.