Dr. Matthew Tietbohl

@whyoceansmatter.bsky.social

🦞 New (our) paper! 🌊🛰️ A simple trophic transfer index predicts spiny lobster fishery dynamics is now online in Comms Earth & Environment. It started with a practical management question: Why has Bermuda's spiny lobster fishery declined so dramatically over the last decade? doi.org/10.1038/s432...

A simple trophic transfer index predicts spiny lobster fishery dynamics - Communications Earth & Environment

A simple trophodynamic index based on primary productivity and transfer efficiency outperforms models based on climatology, persistence and environmental factors when applied to Bermuda’s population o...

doi.org

Hey #ICRS2026 folks! If you want to learn more about how the 4th Global Bleaching Event impacted coral reefs throughout the Red Sea, then you should come and see my talk this Thursday at 14:00 in Room 505 🪸 🐠 🌊 🌞 "Unprecedented thermal stress and bleaching of Red Sea coral reefs"

Bild

#ICRS2026 🪸🐠Fantastic reminder of the power of inter generational knowledge and the value of connection to ancestry and nature to focus conservation efforts. Ancestral codified knowledge in many forms has value & insight of great power for how we consider conservation. - Dan Hikuroa

Bild

🧵1/11 New paper alert! One of 2 out today from #NearLab. Tunas are basically the superheroes of the ocean — warm-blooded, massive, and blazing fast. But HOW did they get that way? A new study just cracked open 50+ million years of evolutionary history. Let's dive in. 🐟⬇️

Bild

”Comprehensive understanding of benthic ecology, essential for robust marine management, reliable numerical analysis, and taxonomic consistency, cannot be achieved without the continuity provided by long-term data”. 🌐 Read more: Birchenough et al., 2026, doi.org/10.1093/ices...

The importance of long-time series of benthic data for science and management

Abstract. Benthic organisms are important ecological receptors, playing fundamental roles across seafloor ecosystems, delivering some of the most important

doi.org

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/... 🌐🐠🐡🦈🐟

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.

science.org

The food chains on modern Caribbean coral reefs may have shortened by up to 70% compared with those on their prehistoric counterparts, according to research in Nature. The findings suggest that modern reefs could be increasingly vulnerable to external stressors and ecosystem collapse. 🌍 🧪

Fossil isotope evidence for trophic simplification on modern Caribbean reefs - Nature

Using nitrogen isotopes from ancient and modern fish otoliths and corals, the study shows Caribbean reef food webs are now 60–70% shorter and functionally less diverse, indicating human-driven trophic simplification and increased risk of collapse.

go.nature.com

1. Some good news at last. This week’s column is about the amazing thing a couple of us stumbled into three years ago, which we’ve now developed into a global research programme. It doesn’t change everything, of course, but it could help change quite a lot. + 🧵 www.theguardian.com/commentisfre...

Over a pint in Oxford, we may have stumbled upon the holy grail of agriculture | George Monbiot

I knew that a revolution in our understanding of soil could change the world. Then came a eureka moment – and the birth of the Earth Rover Program, says Guardian columnist George Monbiot

theguardian.com