Nicolas Bekka Urban Ecologist

Investigating how urban environments shape the variation & evolution of bird colorations. Combining fieldwork, advanced imaging, and statistical modeling to understand urban evolutionary ecology.

Nicolas Bekka - Urban Ecologist

About Me

Understanding urban evolution through avian ecology

I study how birds look and evolve in cities. As a Ph.D. candidate in Urban Evolutionary Ecology at Sorbonne Université, I investigate how urban environments shape the coloured signals of birds and their performances in reproduction.

By combining fieldwork with advanced imaging, high-resolution GIS, and statistical modeling, my research explores how urbanization processes, from pollution to habitat fragmentation, alter wild birds' evolutionary trajectories. I focus on two close relatives, the great tit and blue tit, to uncover how their plumage signals evolve in response to the city's new rules.

I believe science must be rigorous without being bland. Cities are messy, so is evolution. And that's where the beauty lies.

"Malgré la neige, le froid et la solitude, nous croyons - les mésanges et moi - au printemps à venir !"

Rosa Luxembourg
Blue Tit Research

Expertise

Technical & Research skills

Technical

  • Geospatial Analysis: QGIS (advanced), fine-scale habitat modeling with high-resolution satellite data
  • Statistical Programming: R (GLMMs, LMMs, data viz, multivariate stats), Python (intermediate), Git/GitHub
  • Avian Ecology: Bird ringing, morphometric measurements, spectrophotometry, nest monitoring
  • AI & Open Science: Machine learning applications in ecological datasets, reproducible workflows, data sharing ethics and FAIR principles
  • Field Expertise: Long-term population surveys in urban & rural ecosystems

Research

  • Experimental Design: Longitudinal & comparative studies, urban vs rural gradients
  • Selection Analysis: Phenotypic gradients, fitness proxies, multivariate statistics
  • Scientific Communication: Peer-reviewed writing, conference presentations, public outreach
  • Data Communication: Complex data visualization in R and QGIS
  • Interdisciplinary Collaboration: Integration of urban ecology, evolution, and remote sensing
  • Animal Welfare & Research Ethics: Certified for wildlife research, ethical protocols, and responsible field experimentation

Research

Investigating urban evolutionary ecology

Urban Phenotypic Variation

Urban environments impose novel pressures on wildlife: fragmented habitats, light and noise pollution, altered food webs. I study how these pressures shape observable traits -phenotypes- in wild bird populations of great tits and blue tits.

Using high-resolution satellite imagery, fine-scale GIS habitat characterization, and detailed field data, I examine how traits linked to plumage coloration vary with urbanization intensity. This variation reflects how individuals navigate the challenges of urban life—and how cities reshape the very expression of biodiversity.

Urban Evolution

I investigate whether urban environments generate consistent selection patterns, and whether these pressures might drive adaptive responses in bird populations.

My work combines longitudinal monitoring, spectrophotometry, and reproductive data to detect fitness advantages tied to colouration traits. I analyze how coloured signals like carotenoid chroma or melanin-based ornaments evolve differently in urban vs rural habitats.

Teaching

Academic instruction & scientific outreach

Teaching Assistant

Sorbonne Université 2023 – Present
  • Ecology & Evolution practical and tutorial sessions (72h) for groups of 30+ undergraduate students
  • Introduction to Ethology practical sessions (36h) for groups of 30+ undergraduate students
  • Geographic Information Systems practical sessions (72h, QGIS) for groups of 15+ Master's students
  • Assessment of assignments and supervision of student projects

Research Supervisor

Institute of Ecology and Environmental Sciences, Sorbonne Université 2023 – Present
  • Co-supervision of 10+ interns per year on field logistics, ecological data management, animal ethics, and wildlife handling
  • Introduction to R programming for statistical modeling, data analysis, visualization, and interpretation

Scientific Outreach & Communication

Urban Field Campaigns Ongoing
  • Public engagement – Explaining ecological challenges related to urbanization to the general public
  • Animal ethics awareness – Presenting regulatory frameworks and best practices in research
  • Scientific protocol demonstrations – Explaining bird monitoring and data collection methods
  • Non-academic presentations – Presenting doctoral project work and results to Paris Green Spaces and Environment Directorate (DEVE) teams (2024) and Jardin des Plantes green spaces and menagerie teams (2024)

Publications

Recent research contributions

Colours of urban selection: Carotenoid-based signals reveal divergent urban/rural evolutionary trajectories in two closely related passerines.

Bekka, N., Agostini S., Perret, S., Biard, C. (2025)

Oikos –

Urbanisation and the evolution of sexually dimorphic traits: Evidence from black-tie ornamentation in great tits

Bekka, N., Agostini S., Perret, S., Biard, C. (2025)

Ecology & Evolution –

Birds in the Grey Zone: High-Resolution Satellite Imagery Reveals Continental Patterns in Urban Great Tits (Parus major)

Bekka et al. (20??)

Ongoing Project

Ongoing European collaborative project investigating spatial variation in carotenoid-based breast coloration in Parus major across major urban territories (Montpellier, Warsaw, Lund, Turku, Antwerp).

Conferences

Recent presentations & talks

Nov 2024

"Urbanisation and the Evolution of Sexually Dimorphic Traits"

RT ParusNet Meeting, Paris, France • 40+ researchers

Black-tie ornamentation selection patterns in urban vs. rural environments

Apr 2024

"The colouration of urbanisation"

British Ornithologists' Union (BOU), Nottingham, UK • 125-250 researchers

Great tits' colouration correlates with fine-scale landscape properties

Apr 2023

"Colours of evolution: Plumage colouration as marker of divergent selection"

British Ornithologists' Union (BOU), Nottingham, UK • 125-250 researchers

Divergent selection patterns on yellow breast feathers in cities

Feb 2023

"Colours of selection: plumage as marker of convergent pathways"

"ParidMeeting", Montpellier, France • 40+ researchers

Patterns of selection on yellow carotenoid-based colouration

Contact

Let's connect

Location

Paris, France