Robert Ladwig

Clarifying the trophic state concept to advance macroscale freshwater science and management For over a century, ecologists have used the concept of trophic state (TS) to characterize an aquatic ecosystem's biological productivity. However, multiple TS classification schemes, each relying on...

New paper alert!! Our viewpoint piece uses data from the U.S. EPA National Lakes Assessment + Landsat to see how differing definitions of trophic state can skew and enhance our understanding of lake ecosystems! @ecologicalsociety.bsky.social esajournals.onlinelibrary.wiley.com/doi/10.1002/...

We’re going 3D now, thanks @andreasbert.bsky.social @freshwaterau.bsky.social

Nerve-wracking (but fun!) training of installing shear probes and thermistors into our new microCTD with @tubabucak.bsky.social Now we’re ready for the field!

It was a really fun field day!

Don’t mind us, just recovering a buoy and upgrading it for more high-frequency data gathering!

Testing the ECO ADCP at Lake Ormstrup (thanks to our colleagues in Roskilde who lent it to us!). Now, we hope for the wind to pick up, so we can measure some velocity profiles.

So happy to share the news that we’re hosting the FIFTH iteration of Hacking Limnology/DSOS this summer! It will be a fest!

Got to love a bit of early morning sampling with the mist rising off the lake before the days 'heat' arrives.

We're making waves at #EGU25 today in the amazing GHG dynamics in aquatic ecosystems session! In case you have missed it, continue reading 🫰

THE BUOYS ARE BACK IN TOWN!

We got new buoys today to extend our lake monitoring for the Danish Long-Term Ecological Research. These will extend our high-frequency data sets of oxygen and temperature in two new lakes to better understand slow as well as rapid environmental changes.

📈 Fri at 9:05 in HS10.4, Mustafa Onur Önen will talk about probabilistic parameter estimation in lake modeling

and, last but not least,
🚿 I will show a poster at 14:00 in HS10.4 asking the question if equifinality can emerge from multiple lake models

🫧 Wed at 11:55 in BG4.6, Tuba Bucak will talk about optimal sampling frequency for GHG emissions
💻 Fri at 8:55 in HS10.4, Johannes will present the performance of lake models across the globe and how to improve their projections

🌊 HS10.4 THE Lake Session, Thu-Fri - I am super stoked to co-convene this session together with an amazing group of people, see lnkd.in/d8EbjFsZ
🏞️ Wed at 11:15 in BG4.6, Thomas Davidson will highlight how mixing affects CH4 and CO2 fluxes in Danish lakes

I'm super excited to finally attend EGU again after many, many years in which I heavily missed that fantastic conference. There will be amazing talks and posters, and of course many opportunities for networking (and grabbing some fresh swag!), like ...

Just published! 🚨 Microplastics are persistent pollutants and hotspots for bacterial biofilms, including halotolerant pathogens. Could these plastic carriers be spreading harmful microbes? 🦠 Dive into this research in Anatolian saline lakes 🌊 @juanppacheco.bsky.social

doi.org/10.1007/s107...

Here's is my experience from the financial crisis of 2008 (and Covid). Even though the whole way we are doing and funding science has changed significantly, people's shortcuts for determining whether or not you are "succeeding" will take longer to recalibrate. /1

New PhD student in Freshwater Ecology I am Edevardt Danielsen. I come from northern Norway and is a PhD student. I am particularly interested in how aquatic ecosystems contribute to greenhouse gas emissions, with focus on the interactions...

A warm welcome to Ed. edevardtdanielsen.bsky.social.
ecos.au.dk/aktuelt/nyhe...

🚨 New paper out! Tackling Harmful Algal Blooms (HABs) in Mar Menor, Spain 🌊🌿 @juanppacheco.bsky.social et al. coupled SWAT+ and WET models to explore how agricultural best management practices can help mitigate HABs in one of Europe’s most vulnerable coastal lagoons

doi.org/10.1016/j.je...

Let’s do this!

I always liked “introduction to systems analysis” by Imboden and Pfenninger. It gently introduces different approaches to model ecosystems

The aim of this home made, low cost, system Ed is working on is to measure fluxes of carbon dioxide and methane (diffusion and bubbles) 6 times a day, 7 days a week, hopefully 365 days the year on all 24 mesocosms. That will 52 560 flux estimates, though we might miss a couple over the year!

@edevardtdanielsen.bsky.social, @tubabucak.bsky.social, @etileter.bsky.social and @thosdavidson.bsky.social launched Ed’s PhD project at the Lemming mesocosms! We study how nutrients, temperature, and macrophytes affect oxygen dynamics and GHGs in aquatic systems. Excited to see what we uncover!

Work with me on getting depth-discrete profiles of water quality using high-frequency loggers and microCTD measurements! And then let’s be creative to infer mechanisms that could improve mechanistic modeling.

Great paper that highlights the performance of four lake models (bulk, energy balance, and 2x k-Epsilon models) on lakes, globally! There’s no clear winner. Some perform well there, some better there. So, using ensemble modeling is the path forward to improve projections and state uncertainty 🌊🌡️💧

Work laptop shuts down instantly when I connect it to my AirPods, blue screen and everything. Maybe the universe is telling me something here

How can we build better predictive models? And what can AI tell us about complex ecosystem mechanisms?

I’m hiring a PhD student to work with me on applying data-driven discovery methods on high-frequency lake data to begin September 2025. Application is due on May 4.

Frogs, toads, newts paddling
Sampled across Europe’s ponds
what drives their numbers

Hot off the press a nice paper from the PONDERFUL project on what drives Amphibian diversity in ponds, happy Friday.
nsojournals.onlinelibrary.wiley.com/doi/10.1111/...

Are you interested in field work and data science? We're looking for a PhD student interested in data-driven analysis of non-linearity in lake ecosystems to begin September 2025.
Please share far and wide, and contact Robert for any questions!

Here's the official description: lnkd.in/dzTwudQz

Germany: Bundestag supports stricter migration policies – DW – 01/29/2025 The German parliament debated motions to tighten migration rules after a deadly attack by a rejected asylum seeker. CDU leader Friedrich Merz said he would not shun the help of the far-right AfD to pu...

A dark day for German democracy, the ‘firewall’ is broken.

www.dw.com/en/germany-b...

This is one of the papers that made me fall in love with this group! Do we need stable state theory to explain algae dynamics? Such an interesting thought