Ludovic Hoarau

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Marine animal forest formed by gorgonians Subergorgia on near‐shore mesophotic ecosystems in Reunion Island Mesophotic coral ecosystems (MCEs), occurring between 30 and 150 m depth, are increasingly recognized for their ecological importance, yet they remain underexplored, particularly in the southwestern ...

esajournals.onlinelibrary.wiley.com/doi/10.1002/...

Ecosphere: Vol 16, No 9 <em>Ecosphere</em> is an open access journal publishing research in all areas of ecology, spanning multidisciplinary fields, from computer science to social sciences and eco-education.

Our article made the cover of @esajournals.bsky.social Ecosphere Naturalist🤩🪸!
We describe a mesophotic animal forest formed by large gorgonians off northwestern coast of Reunion Island. Refuge for biodiversity but vulnerable in need of protection!
esajournals.onlinelibrary.wiley.com/toc/21508925...

What is the #BBNJ and why does it matter?
The Biodiversity Beyond National Jurisdiction (BBNJ) Agreement is a landmark global treaty to protect life in the High Seas, the vast ocean areas beyond any one country’s borders. 🧵👇

Great Barrier Reef records largest annual coral loss in 39 years The Great Barrier Reef has experienced its greatest annual loss of live coral across most of its expanse in four decades of record-keeping, Australian authorities say.

🌊 Great Barrier Reef records largest annual coral loss in 39 years

phys.org/news/2025-08...

Cryptobenthic crab assemblages are more distinct across a 90 m depth gradient than 2500 km of shallow marine habitat in the Hawaiian archipelago - Scientific Reports Scientific Reports - Cryptobenthic crab assemblages are more distinct across a 90&nbsp;m depth gradient than 2500&nbsp;km of shallow marine habitat in the Hawaiian archipelago

New (OA) paper out today! This one's got crabs 🦀 AND #mesophotic reefs!

We looked at crab communities throughout Hawai‘i and down a 90 m depth gradient. They were more different across depth on one island than they were across the entire ~2,500 km stretch of the archipelago on shallow reefs.

Spotted at 65 m off Réunion 🇷🇪 — a potato grouper (Epinephelus tukula), critically endangered locally. #Mesophotic reefs may offer refuge where shallow zones no longer can. Vital ecosystems still understudied, yet key for conservation.
#DeepReefs #Reunion #Grouper

Emergent properties in the responses of tropical corals to recurrent climate extremes Hughes et al. quantify the extent of five episodes of coral bleaching on the Great Barrier Reef caused by anthropogenic heating. Bleaching thresholds vary spatially and temporally, depending on the ec...

The graphic shows bleaching thresholds in different events on the Great Barrier Reef. X-axis is NOAA’s Degree Heating Weeks metric. Source: www.cell.com/current-biol...

84% of the world’s coral reefs impacted in the most intense global coral bleaching event ever

Coral recruitment in mesophotic coral ecosystems is lower and taxonomically distinct from shallow environments at Reunion Island, southwestern Indian Ocean - Coral Reefs Coral recruitment is an essential demographic mechanism that underpins the community structure and dynamics of coral reefs and facilitates post-disturbance coral recovery. However, information on cora...

The 2nd paper of my PhD (Chapter 4) is out! #Coral recruitment in #RéunionIsland decreases with depth, showing distinct patterns across shallow (15m), upper (45m) & lower #mesophotic zones (75m) highlighting depth-driven variability of coral demographic processes.
link.springer.com/article/10.1...

Marked spatial heterogeneity of macro-benthic communities along a shallow-mesophotic depth gradient in Reunion Island - Scientific Reports Scientific Reports - Marked spatial heterogeneity of macro-benthic communities along a shallow-mesophotic depth gradient in Reunion Island

The 1st paper of my PhD (chap3) published ! We explored spatial variability of shallow and #mesophotic #coral ecosystems MCEs from 15 to 95 m at #ReunionIsland. We found diverse sessile benthic and coral communities: an essential baseline for MCEs #conservation.
www.nature.com/articles/s41...

If people still needed a wake up call, this should be it. We need Climate Action Now. Anything less is a failure to uphold our obligations to protect - for now, and into the future - Australia's biological and cultural heritage.