Violeta Calleja

New blog post:

"Higher orders need higher standards"

skewed.de/lab/posts/hi...

I discuss our current work disentangling misconceptions around "higher-order" networks: arxiv.org/abs/2602.16937

Explainer thread for the paper here: bsky.app/profile/tiag...

The NYT style guide

📣 Join us for the TENET satellite at @netsciconf.bsky.social in Boston!
Following the enthusiasm for last year’s editions, we're bringing together researchers working on Temporal Networks!
✏️2 pages abstracts
📆 Submit by Feb 20, 2026
🔗 more info here: tinyurl.com/4zevnyft

‘The Ecology of Ecologists’: what, if anything, is ecology? (book review) What, if anything, is ecology? You would think I’d know that – I’ve been a practicing (academic) ecologist for about 40 years. But I don’t. Sure, I know some stuff. I know that ecology isn’t the sa…

Jeremy Fox has a new book out, 'The Ecology of Ecologists'. What's that about, and should you read it? (Quick answers: how ecology's chaos of approaches is a feature, not a bug; and YES.) scientistseessquirre... 🌍🧪

Congrats Dr Maull!

The “Epstein Files” and the anatomy of hidden social networks How secrecy reshapes structure and why its analysis is conditional on the data

A lot of “network analysis” about the Epstein Files.

Nearly all of them missing the point: when a system operates under strong incentives for discretion, what gets documented is NOT a neutral sample of reality.
Results are conditional on what is observed!

open.substack.com/pub/manlius/...

☀️ 2026 Summer School in the Pyrenees - Unifying Mathematical Models of Biodiversity
Applications are now open!
This school offers a state-of-the-art overview for interdisciplinary theoreticians.
🗓️ July 5-11
🎯 PhD students to senior researchers
ℹ️ intp.science/en/summer26....
📭 contact@intp.science
🌐🧪

Apply now to become a member of the Advisory Board!

Excited to share a new PhD thesis from my student and soon Dr @vmaull.bsky.social on synthetic ecosystems, preventing tipping points, and a new concept: emergent bioengineering. Very proud of this achievement, and thankful to @sfiscience.bsky.social, where many of these ideas came to life.

📣We will be back soon with a new series of online theory seminars!

As ever, free and open for all via Zoom. Follow us on here, or join our email list (iite.info/seminar-emai...) for details.

In the meantime, all our past talks are on Youtube: www.youtube.com/@theoretical...

See you there!

🌱🧩 La semana pasada tuvo lugar en Sevilla la 4ª Reunión de la Sociedad Española de Sistemas Complejos, organizado por nuestras investigadoras @violetacalleja.bsky.social y @domgarvir.bsky.social y la @unisevilla.us.es.

La investigadora @paniw.bsky.social fue una de las conferenciantes invitadas.

The call for participants for Complexity72h is finally open! Apply by February 28 for the best collab ever!

Why???
✨ Amazing projects
👩‍🏫 Fantastic tutors
📍 A great location

👉 Apply now: www.complexitynextgen.org/complexity72...

Do you REALLY need anything else to be convinced?
We didn’t think so.

Pablo Valgañon during his talk

Pablo Valgañon presenting our results

@pvalganon.bsky.social from @paleoipe.bsky.social group at the @ipe-csic.bsky.social presenting our work on causal networks in pleoecology at the CS3 meeting @cs3conference.bsky.social taking place in Sevilla.

¡Hola a todos! Esperamos que hayáis disfrutado de las fiestas. Os recordamos que el cierre de contribuciones es el 12 de enero. ¡No os quedéis fuera!

Más información en: fisesjoven26.gefenol.es

I'm really happy to see this article being published!

I find it very intriguing that the topology of genotype networks, which reflects the exploration of the antigenic space, can alone be enough to explain seasonality in epidemic trajectories.

Una pena que la universidad no tenga un grado en bellas artes y tenga que hacer un vídeo con IA de estatuas sin pies ni manos...

🚨 What if evolution is the ”law”… and networks are the machines that do the work?

In this paper (just published) I try to formalize how living systems are non-equilibrium, information-processing, adaptive matter. With a great biological flavor! 🧪🌐🌍🧬🦠

👉 iopscience.iop.org/article/10.1...

🧵 1/

Context Widows or, of GPUs, LPUs, and Goal Displacement

Nature would do well to publish more content like this thoughtful piece from @kevinbaker.bsky.social and fewer Buzzfeed listicles gussied up as career advice "Five productivity hacks for using AI in your scientific workflow"

Avi Loeb y los científicos que se pasan al ‘lado oscuro’: cuando el enemigo de la razón duerme en casa Figuras como el físico de Harvard, que defiende que los cometas interestelares podrían ser naves alienígenas, erosionan la credibilidad de la ciencia desde dentro. Sus perfiles prosperan en un ecosist...

Manudo articulazo se ha marcado @aberron.bsky.social sobre los científicos que se pasan al lado oscuro. En @eldiario.es , www.eldiario.es/sociedad/avi...

Our new science exhibition “The Invention of Time” has just opened in Barcelona. Come explore time in physics, brains & life, from Evolution 2 relativity. We even have a working Time Machine (that’s me using it) @ibe-barcelona.bsky.social @icreacommunity.bsky.social museuciencies.cat/en/exposicio...

Population Structure Plays a Key Role in Community Stability Population structure is a widespread yet underappreciated feature of ecological communities. Here, we develop a general theoretical framework integrating life-stage structure into community matrix mo...

New article out in Ecology Letters!

Developing a general math model, we show how cross-stage interactions modify the stability predicted by classic unstructured models.

📄 Population Structure Plays a Key Role in Community Stability. @ox.ac.uk @ifisc.uib-csic.es @ceabcsic.bsky.social @csic.es

Looking forward to the Modern Coexistence Theory workshop tomorrow.

Please repost :)

The @cssociety.bsky.social has issued an open letter on academic freedom and human rights following the non-stop genocide in Gaza:

drive.google.com/file/d/1-q5E...

🚨🚨 ¡Atención! 🚨🚨

La IV edición del congreso FisEs Joven, un congreso online dedicado a jóvenes investigadores e investigadoras en física estadística, se celebrará los días 10, 11 y 12 de marzo. (1/2)

hmm I concede. Let's say that we got a sweet point in the 00s, and right now we are at the other side of the curve, where finding "information" is quick, but the quality is worsening. Ex: searching for images and finding AI-generated ones

The amount of time and work needed back then still is small compared with the amount of time we *waste* on the byproducts of today’s Internet aka social networks and shitty AI web search‘s results

Congrats Nerea! 🐝 🕰️

Generalized plant–pollinator phenological climate‐driven advances still lead to a decline in phenological overlap Climate change is altering the phenology of interacting species, potentially leading to mismatches in the timing of their interactions. This may affect the delivery of key ecosystem services such as ...

My 1st thesis chapter is out in #EcologicalMonographs! 🎉
With @curromolina.bsky.social @ibartomeus.bsky.social
How is #climatechange reshaping plant–pollinator timing (phenological overlap) in Mediterranean ecosystems? Can #biodiversity buffer mismatches?
Find out here👇
dx.doi.org/10.1002/ecm....

Signed Networks: theory, methods, and applications Signed networks provide a principled framework for representing systems in which interactions are not merely present or absent but qualitatively distinct: friendly or antagonistic, supportive or confl...

Our team just released a comprehensive and accessible review of Signed Networks — two years in the making! Theory, methods, applications, all in one place. Feedback welcome.
arxiv.org/abs/2511.17247

🚨 Job alert 🚨 Postdoc position in ecological forecasting 📈 as part of the Horizon Europe OSCARS call. The postdoc will be based in lovely Sevilla (fantastic place to live) and will include working closely with several European forecasting projects. Apply by Dec 11! 🌎🧪 globalchangeeco.com/jobs