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Kilian Perrelet

@kperrelet.bsky.social
308 followers 280 following 13 posts

Postdoctoral fellow at @wslresearch.bsky.social. Curious about urban plants, their metabolites, the food webs around them, and what climate change and urbanization mean for all of the above!

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Reposted by Kilian Perrelet
Eawag Aquatic Research @eawag.bsky.social · 23/07/2026
Green roofs differ from ground-level habitats in terms of biodiversity. This can help to boost biodiversity in cities. 🌱🪱 f.mtr.cool/rvuvszuipu @florianaltermatt.bsky.social  @laurenmcook.bsky.social @kperrelet.bsky.social
f.mtr.cool
Green roofs provide additional habitats
Green roofs differ from ground-level habitats in terms of biodiversity. This can help to boost biodiversity in cities.
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Reposted by Kilian Perrelet
Plants, People, Planet @plantspeopleplanet.bsky.social · 10/07/2026
Social-ecological signatures in plant species composition across Swiss cities and urban green space types @joancasanelles.bsky.social, et al. nph.onlinelibrary.wiley.com/doi/10.1002/... @kperrelet.bsky.social @wslresearch.bsky.social #PlantScience
Urban plant community composition across the three cities.
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Kilian Perrelet @kperrelet.bsky.social · 12/09/2025
Last week, I defended my PhD thesis! 🎉 4 years diving into blue-green infrastructure, biodiversity, food webs, eDNA, and above all, amazing collaboration between engineers and ecologists 🏣🌱🐞🧬 Big thanks to @laurenmcook.bsky.social, Marco Moretti, and @florianaltermatt.bsky.social!
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Reposted by Kilian Perrelet
Lauren M Cook @laurenmcook.bsky.social · 07/08/2025
Green roofs ≠ ground habitats. 🌿🏙️ Only 10% of invertebrate species on the ground are found on nearby rooftops. Green roofs host distinct species that need tailored design to thrive. Treat them as ecosystems, not substitutes. 📄 doi.org/10.1016/j.je... #GreenInfrastructure #Biodiversity #GreenRoofs
doi.org
Redirecting
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Kilian Perrelet @kperrelet.bsky.social · 24/07/2025
Huge thanks to the co-authors: Marco Moretti, Océane Inglard, @florianaltermatt.bsky.social, and @laurenmcook.bsky.social And to the #BGB initiative @eawag.bsky.social @wslresearch.bsky.social 6/6
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Kilian Perrelet @kperrelet.bsky.social · 24/07/2025
The good news: small design changes = big ecological impact. In particular, let's favor... ✅ Deeper substrate ✅ Organic-rich soils ✅ Higher vegetation cover ... to benefit species with varying dispersal abilities! 🦋🐞🦗 5/6
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Kilian Perrelet @kperrelet.bsky.social · 24/07/2025
As expected, flying invertebrates 🦋🐝 thrived on green roofs. But even ground-dwelling species 🕷️ made it up there! However, species that live within the soil (e.g., springtails) didn’t do as well, probably due their limited dispersal and challenging environmental conditions ☀️ 4/6
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Kilian Perrelet @kperrelet.bsky.social · 24/07/2025
Surprising finding: very few species were shared between roofs and ground-level sites. 📍 Spatial isolation didn’t matter much. 🏙️ Instead, green roofs hosted distinct communities, though a bit less species-rich overall. 3/6
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Kilian Perrelet @kperrelet.bsky.social · 24/07/2025
We collected soil samples from 50+ pairs of green roofs and ground-level green spaces across Zurich, Switzerland. Using eDNA metabarcoding 🧬, we identified invertebrates with different dispersal abilities to see who’s living where. 2/6
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Kilian Perrelet @kperrelet.bsky.social · 24/07/2025
Fresh off the press! 🚨 What happens to species with different mobility when we replace urban green spaces with green roofs? Can they migrate to rooftops? 🏙️ TL;DR: Not really, but green roofs still offer unique and improvable habitats! Now out: www.sciencedirect.com/science/arti... 1/6
doi.org
Redirecting
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Kilian Perrelet @kperrelet.bsky.social · 10/07/2025
Big congrats to @merinrejichacko.bsky.social and colleagues on the release of this incredible dataset! Amazing to see such large-scale collaboration come to fruition. Very grateful for early access! It allowed us to demonstrate how #urbanization reshapes and homogenizes multitrophic food webs 🏙️
authorea.com
Urbanization drives the decoupling, simplification, and homogenization of aquatic and terrestrial food webs
Aquatic and terrestrial communities often co-occur at close distance, enabling biotic interactions across ecosystem boundaries. While such interactions in natural habitats contribute to complex, coupl...
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Kilian Perrelet @kperrelet.bsky.social · 22/04/2025
A collaboration between @eawag.bsky.social and @wslresearch.bsky.social with @laurenmcook.bsky.social, @adietzel.bsky.social & @florianaltermatt.bsky.social!
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Kilian Perrelet @kperrelet.bsky.social · 22/04/2025
🚨New paper alert🚨 Exploring urban #aquatic & #terrestrial biodiversity with #eDNA 🧬 ❗ #Urbanization weakens land–water linkages ❗ Aquatic & terrestrial communities follow distinct drivers 🐞🦟 ❗ Adapted primers for aquatic & terrestrial invertebrates 🧬 www.sciencedirect.com/science/arti...
sciencedirect.com
Aquatic and terrestrial environmental DNA signals reveal decoupling of blue-green communities along an urbanization gradient
Urban blue and green spaces, like ponds and parks, can mitigate the negative effects of urbanization on biodiversity by providing diverse, connected h…
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Kilian Perrelet @kperrelet.bsky.social · 13/12/2024
Thank you so much! It was great to meet you!
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Kilian Perrelet @kperrelet.bsky.social · 12/12/2024
Thanks a lot! Could you eventually add me?
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Kilian Perrelet @kperrelet.bsky.social · 12/12/2024
Interested in #foodwebs, #urbanization, or #eDNA metabarcoding? Then come to my talk tomorrow (Friday 13th, 11:30 am) in the Community Ecology Mixed Bag session!
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