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Tianna Peller

@tiannapeller.bsky.social
432 followers 125 following 0 posts

Assistant Prof. at University of Toronto Spatial ecology | Food webs | Ecosystem linkages tiannapeller.com

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Reposted by Tianna Peller
Francois Keck @francoiskeck.bsky.social · 26/03/2026
Our paper “The global human impact on biodiversity” turns one today! 🎂 This figure did not make it into the paper, but I still think it is the most striking. It stacks the 3667 multivariate analyses. Each point is a community. 🔵=reference; 🔴=human-impacted. ⬇️
Synthetic stacked visualization of 3,667 multivariate community comparisons from a global biodiversity meta-analysis. Blue points represent reference sites and red points impacted sites. The two clouds overlap, but impacted communities show a clear directional shift away from reference communities.
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Juan Carvajal-Quintero @juancarvq.bsky.social · 19/02/2026
New paper out examining fish food web degradation in the Anthropocene. We show the structure of aquatic food webs are changing-- even when species richness doesn’t. These signals are strongly associated with decreases in body size within fish communities. www.science.org/doi/10.1126/... 🌐🐠🐡🦈🐟
science.org
Degradation of fish food webs in the Anthropocene
The decrease in body size driven by the selective species turnover is widely altering fish food web topology and function.
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Robert Hechler @roberthechler.bsky.social · 09/02/2026
New in @natecoevo.nature.com, we show that nonlinear dynamics like oscillations & chaos occur in 81% of marine fish populations worldwide. Nonlinearity was correlated with the magnitude of fluctuations & amplified by temperature variation & in fast-lived species. 🌍🌐 Link: doi.org/10.1038/s415...
doi.org
Temperature variation and life history mediate nonlinearity in fluctuations of marine fish populations worldwide - Nature Ecology & Evolution
A global analysis of marine fish populations involving 243 recruitment and 266 spawner time series across 143 species finds that nonlinear dynamics are widespread and that the degree of nonlinearity i...
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Florian Altermatt @florianaltermatt.bsky.social · 23/01/2026
Shifting leaf fall #phenology disrupts #ecosystem #function. Out now @currentbiology.bsky.social: www.sciencedirect.com/science/arti... ➡️ Leaf litter fall 🍂 and processing in temperate streams is one of the most pervasive resource subsidies and ecosystem functions globally 🌍 .
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Emanuele Giacomuzzo @ema-giacomuzzo.bsky.social · 12/01/2026
New paper in Oikos! 🎉 Ecosystems are connected by resource flows, and ecosystem size can mediate their effects. But how does size mediate the effects of resource flows between autotrophic and heterotrophic ecosystems—one of nature's most ubiquitous linkages?
nsojournals.onlinelibrary.wiley.com
Ecosystem size reverses the effect of the spatial coupling between autotrophic and heterotrophic ecosystems
The flow of non-living resources between autotrophic and heterotrophic ecosystems can impact their ecosystem function. However, ecosystem size is similarly known to influence ecological properties an...
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Kristy Ferraro @kristymferraro.bsky.social · 21/08/2025
Animals don’t just live in their environments—they transform them. And in doing so, they may also shape their own evolutionary trajectories. Our new paper in Trends in Ecology & Evolution introduces a framework for zoogeochemical niche construction. A thread 👇
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Florian Altermatt @florianaltermatt.bsky.social · 12/04/2025
Cereghetti et al: #Seasonal #dynamics of detritus flows and #decomposition across #ecosystem boundaries. 🌿🍂🦐 🌐🌍 We studied seasonal dynamics/phenology ⏱️ of 🟩terrestrial-🟦aquatic linkages across a year: www.sciencedirect.com/science/arti... Out in #CurrentBiology @currentbiology.bsky.social 1/4
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Francois Keck @francoiskeck.bsky.social · 26/03/2025
Our study ‘The global human impact on biodiversity’ is out in Nature! Through an unprecedented synthesis (2133 studies!) we show that humans are not only shrinking species numbers—but reshaping entire communities across the planet. 🌍🌐🐟🌿🪲 www.nature.com/articles/s41...
World map showing origin of the data
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Francois Keck @francoiskeck.bsky.social · 26/03/2025
Supported by @uzhalumni.bsky.social and with researchers from UZH and @eawag.bsky.social including @florianaltermatt.bsky.social @tiannapeller.bsky.social @romanalther.bsky.social @rosiecblackman.bsky.social @kirschdo.bsky.social + @ceciliabarouillet.bsky.social @ericcapo12.bsky.social + many others
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Florian Altermatt @florianaltermatt.bsky.social · 07/03/2025
The #EcologyOfMolecules: Understanding how #molecules and #ecosystems interact. 🌳 🧪 🦠 🔬 🦫 🪲🐠🐸 New article by @ecfreewoman.bsky.social, @tiannapeller.bsky.social and myself in #TREE @cp-trendsecolevo.bsky.social: linkinghub.elsevier.com/retrieve/pii... 1/3 🧵
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Emanuele Giacomuzzo @ema-giacomuzzo.bsky.social · 14/02/2025
Interested in the linkage between ecosystems of different trophic types, such as aquatic-terrestrial linkages or benthic-pelagic linkages? 🌊 🐟 🐳 🌲 🌳 🎋 www.authorea.com/doi/full/10....
authorea.com
Ecosystem size reverses the effect of the spatial coupling between autotrophic and heterotrophic ecosystems
The flow of non-living resources between autotrophic and heterotrophic ecosystems can impact their ecosystem function. However, ecosystem size is similarly known to influence ecological properties and...
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Florian Altermatt @florianaltermatt.bsky.social · 13/02/2025
Attending #Biology25 @unil.bsky.social in Lausanne today and tomorrow? wp.unil.ch/biology25/ 🧬🐟🦐🌿🌳🔬💧🌐 Then look out for #talks & #posters from my group! Lara Chaouat, Antoine Adde, Luke Ireland, Nalonda Chatterjee and Katarina Bičvić are presenting and are happy to talk about their research!
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Erika C. Freeman @ecfreewoman.bsky.social · 04/02/2025
With @tiannapeller.bsky.social @florianaltermatt.bsky.social we make the case: @cp-trendsecolevo.bsky.social inspired by the now classic work from Thorsten Dittmar's group at The Carl von Ossietzky University of Oldenburg
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Erika C. Freeman @ecfreewoman.bsky.social · 04/02/2025
🧪 💡 🗣️ Just as genomics revealed the hidden world of individual microbes and their interactions, it's time to uncover the "ecology of molecules"—how individual compounds and compound communities shape ecosystem processes. 🌐🌍🦑🍁💧🧬🔬🔎🌱📚 www.sciencedirect.com/science/arti...
sciencedirect.com
Ecosystem ecology needs an ecology of molecules
Ecosystem ecology needs a framework that explicitly considers the roles of organic compounds. The ecology of molecules integrates compound identity, d…
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