Teun Everts

A single marbled crayfish can start a population alone. 🦞

In the Netherlands, we're using eDNA to protect ponds from this rapid invader. At this stage, control is still possible!

Read more: guardias.eu/tracking-mar...

#GuardIAS #InvasiveSpecies #Netherlands #eDNA #Science

Registration is open for GuardIAS Summer School 2026, with a focus on e-DNA and Invasive Species! 🌊

Explore the program and meet the trainers: guardias.eu/welcome-to-t...

Register here: docs.google.com/forms/d/e/1F...

#GuardIAS #InvasiveAlienSpecies #IAS #InvasiveSpecies #BioInvasions

Just published: a global synthesis of the ecological, economic, and socio-cultural impacts of #BiologicalInvasions, led by P. Haubrock. A timely framework for science, management, and policy in the Anthropocene.
👉 doi.org/10.1002/brv....
🧪🌐🌍 #bioinvasions #InvasiveSpecies

💥This is one of the most complete reviews on impacts of biological invasions, and was a shared effort of many experts globally.

Co-leading this was a huge honour!

📈📉 #Non-native species can generate negative, neutral, or positive effects, often at the same time and in different domains.

Effective management therefore requires integrated, transparent, and #context-aware impact assessments, not one-size-fits-all labels.

⚙️ Impacts emerge through #mechanisms (e.g. #competition, #predation, #hybridization, ecosystem engineering) but manifest at different biological levels—from individuals to ecosystems.

Confusing mechanisms with consequences is a common source of error in impact studies.

🌐 Interest in invasion impacts has exploded since the 1980s—but growth in publications has not resolved core problems.

Despite more data, comparability, context-dependence, and bias remain major obstacles to drawing robust conclusions across systems.

💡 Invasion #impacts extend far beyond ecology.

They span #ecological, #economic, and #socio-cultural domains, often simultaneously—yet are shaped by data gaps, confounding factors, scale, and stakeholder values.

Our framework shows why “impact” is never a single, simple number.

🚨 New #OA review in Biological Reviews: The impacts of biological invasions 🚨

With researchers across the globe, we synthesize nearly a century of evidence across taxa and ecosystems to clarify what #invasion #impacts are, how they arise, and why they are hard to assess.

doi.org/10.1002/brv....

Invasion impacts extend far beyond ecology.

They span #ecological, #economic, and #socio-cultural domains, often simultaneously—yet are shaped by data gaps, confounding factors, scale, and stakeholder values.

Our framework shows why “impact” is never a single, simple number.

Huge milestone (again) 😁. Congrats Franck, well-deserved! 👽

Hey, I succesfully defended my #PhD! 🐸👽

I have been using #eDNA and #popgen to study the distribution, spread, and impact of American #bullfrogs in Flanders. Grateful to my promotors and everyone that has supported me.

Now, the next chaper awaits as @inbo.be postdoc: @guardias.bsky.social

But then the question becomes: what do we, as a scientific community, value most: an objective review system where outcome can not be influenced by prior knowledge on author identity, or the ability to post an unreviewed, and therefore unfinished, work?

I think double (and even triple) blind review should be the standard. I dont know why a reviewer should know the identity of the authors?

Authors uploading preprints choose to reveal their identity. By abolishing double blind review, you dont leave the choice to the authors, which is problematic.

Fresh insights at #GuardIAS Conference from @teuneverts.bsky.social : pooled #eDNA sampling is proving a smart, cost-efficient way to track the northernmost Xenopus laevis invasion. With 100+ km² already occupied, this approach delivers fast, actionable intelligence for cross-border management.

Back from my 2nd time attending the #InvaPact workshops, aiming to assess ecological #impacts of biological #invasions globally. Its incredible how well these workshops are organized, and the intended impacts they will have on scientific literature.
#grateful
#newfriends
#inspired
#motivated

Pooled eDNA sampling effectively maps the northernmost African clawed frog invasion, enabling fast, cost-efficient cross-border detection and management. Coordinated action is required along the French-Belgian border.

🔗 doi.org/10.3897/neob...

@teuneverts.bsky.social @inbo.be

Cutting edge technology leads defence against attack of the clones Project deploys cutting-edge tools such as eDNA and AI to lead the fight against invasive alien species in Europe

Explore the role of eDNA in tackling the marbled crayfish, one of Europe’s most concerning freshwater invaders, as part of the #GuardIAS project 👇

#InvasiveSpecies #Biosecurity

www.alphagalileo.org/en-gb/Item-D...

Mapping the northernmost transnational non-native population of Xenopus laevis using pooled eDNA sampling Early-detection-rapid response (EDRR) programs are invaluable for managing incipient invasions, but require monitoring strategies that maximize search coverage and minimize costs. While environmental ...

great work from @teuneverts.bsky.social @inbo.be belgian #xenopus invasion is published still great needs for cross border collaboration @neobiota.pensoft.net @neobiota.bsky.social neobiota.pensoft.net/article/1503...

Day 2 of the #GuardIAS meeting was all about our 11 case studies!

Great to see the nitty-gritty of using eDNA & drones for detection, modelling population spread, and launching new citizen science projects.

Also got a preview of upcoming online events from at @invasivesnet.bsky.social.

Teun Everts @inbo.be showcasing the #xenopuslaevis @guardias.bsky.social case study rapid response effectiveness can be measured w #eDNA amazing conservation work

Wrap on Day 1 of the GuardIAS project meeting in Thessaloniki! 🇬🇷

A jam-packed day of collaboration, covering everything from AI & eDNA for tracking invasive species to boosting citizen science.

Ready for Day 2!

#GuardIAS #InvasiveSpecies

Five years of hard work comes down to today...

Time for my internal #PhD defence!

Lets hope I make it out alive 🐸

#eDNA #genetics #SNPs #Bioinvasions

YouTube video by Instituut voor Natuur- en Bosonderzoek Kan een inheemse roofvis zoals snoek de Amerikaanse stierkikker indijken?

@teuneverts.bsky.social en Rein Brys testen uit of snoek kan worden ingezet als inheemse roofvis om de grote stierkikkerpopulaties - zoals in en rond Geel - in te dijken. Teun, Rein en de collega's voeren een proef uit aan de hand van vier 'vijvertypes'. youtu.be/zQYOWiKHCmY

Plenary Speaker Announcement | We are pleased to announce that David Dudgeon will be presenting ‘Global homogenization of freshwater fish diversity during the Anthropocene: evidence from tropical East Asia’ at ICAIS 2026.

#Chytrid fungus and #ranavirus jeopardize amphibian well-being.

We present a novel duplex #eDNA assay to detect both simultaneously from water samples.

We also show that the presence and density of #invasive #bullfrogs is related to that of chytrid fungus, but not ranavirus, in space and time 🐸

SAVE THE DATE #Neobiota2026 is coming to Brussels Leave your contact details www.neobiota2026.org

From anarchy to clarity, data pre‐processing and statistical choices influence quantitative environmental DNA (eDNA) analyses Environmental DNA (eDNA) analyses hold great potential for increasing species detection sensitivities and estimating species abundances. The rapidly growing user base, continuous method developmen...

#OA article in Methods in Ecology and Evolution below

doi.org/10.1111/2041...

💡 Think carefuly about the analytical choices made when relating #eDNA #concentrations to species #abundance and #density!

⚠️ We show that a variety of (suboptimal) methods are used to investigate these relationships, and that these problematic statitiscs lead to flawed outcomes

👇 #OA article below

Abstract submissions have just opened for #ICAIS2026, hosted in Northern Ireland at @qubelfastofficial.bsky.social

The conference theme is "Transcending Boundaries", considering habitats, disciplines, regions, and research-policy interfaces

Deadline: September 26, 2025

icais.org/icais-2026/c...