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Johan Renaudie

@plannapus.bsky.social
296 followers 662 following 35 posts

Micropaleontologist. #Radiolaria 🔬🌊🦠

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Reposted by Johan Renaudie
PAGES (Past Global Changes) @pages-ipo.bsky.social · 21/04/2026
🥳 It’s out! 📢 New PAGES Magazine: “The essence of time” Explore gaps, challenges & future directions in geological dating - from biostratigraphy to radioisotopic methods. ⭐ Read here: pastglobalchanges.org/publications... #PAGES #Paleoscience #EarthScience @marumunibremen.bsky.social
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Johan Renaudie @plannapus.bsky.social · 18/03/2026
I heard a stratigraphy joke but it was a bit dated.
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Wolfgang Kiessling @kiessl.bsky.social · 12/02/2026
New paper emerging from our Paleosynthesis project @paleosynth.bsky.social. In www.nature.com/articles/s41..., we highlight the value of databases to #paleontology and the importantce of sustained funding. Our finding are probably applicable to other science fields as well.
nature.com
The billion-dollar case for sustaining palaeontology’s digital databases - Nature Ecology & Evolution
The authors survey community palaeontological databases, documenting their contributions to science as well as their vulnerabilities, and provide recommendations for the future of open science databas...
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Reposted by Johan Renaudie
Emma Dunne @emmadnn.bsky.social · 11/02/2026
🚨 Hot off the press: Our look into of the palaeontological database landscape and its sustainability into the future. Palaeo databases are invaluable and continue to transform our research field - but they are vulnerable... (1/6) 🧪 ⛏️ www.nature.com/articles/s41...
nature.com
The billion-dollar case for sustaining palaeontology’s digital databases - Nature Ecology & Evolution
The authors survey community palaeontological databases, documenting their contributions to science as well as their vulnerabilities, and provide recommendations for the future of open science databas...
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Dr. Bethany Allen @bethanyjallen.bsky.social · 11/02/2026
What do we want? Fossil databases! 🐚🦕 When do we want them? Forever! 🗓️ Nice new paper highlighting how academic funding systems and digital architecture need to change, to ensure we can protect and sustain our precious fossil data 📚 www.nature.com/articles/s41...
nature.com
The billion-dollar case for sustaining palaeontology’s digital databases - Nature Ecology & Evolution
The authors survey community palaeontological databases, documenting their contributions to science as well as their vulnerabilities, and provide recommendations for the future of open science databas...
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Reposted by Johan Renaudie
Proceedings of the National Academy of Sciences @pnas.org · 03/01/2026
West Antarctic Ice Sheet glaciers underwent at least five major inland retreats during the Pliocene—a period with temperatures similar to projected future warming—suggesting the possibility of meter-scale global sea-level rise in our future. In PNAS: ow.ly/I6NZ50XRaap
Conceptual models of ice-sheet extent and associated depositional processes along a transect. During peak interglacials with inland ice-sheet retreat, icebergs calve from the retreating ice margin and drift onto the Amundsen Sea shelf. As these icebergs ground and melt, they release most of their detritus on the shelf. During early glacial stages, the ice masses around the Amundsen Sea embayment could regrow rapidly and coalesce into an ice sheet. The advancing grounded ice “bulldozed” the sediments, which had accumulated on the shelf during the previous interglacial, toward the shelf break. From there, the fine-grained detritus is transported down to the continental slope mainly by gravitational processes.
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Christine Siddoway @iphigenesdream.bsky.social · 23/12/2025
The #ThwaitesGlacier region has a prior history of dramatic #glacial-deglacial switching in the #Pliocene www.pnas.org/doi/10.1073/...
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Maggi Brisbin @margaretbrisbin.bsky.social · 23/12/2025
Only have a dissecting scope onboard, unfortunately.
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EcoEvoRxiv @ecoevorxiv.bsky.social · 16/11/2025
Response to “Radiolarian evolution: Analytical challenges in estimating the diversity and origin of Nature’s stars” doi.org/10.32942/X2V...
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EcoEvoRxiv @ecoevorxiv.bsky.social · 13/09/2025
Fossils for Future: the billion-dollar case for paleontology’s digital infrastructure DOI: doi.org/10.32942/X2D...
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PaleoSynthesis @paleosynth.bsky.social · 07/07/2025
BioDeeptime has made it into Science! "Climate is changing fast—and forests are 200 years behind". A sweeping new analysis of ancient pollen and modern data reveals this dramatic lag—and its consequences."(from ScienceDaily) - article: DOI: 10.1126/science.adr6700 CONGRATULATIONS to the authors.
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Lee Hsiang Liow (廖珕庠) @lhliow.bsky.social · 06/07/2025
Vegetation might not be able to keep up with current rates of environmental change, given data from the pollen fossil record. Fun doing this work with David Fastovich in the lead, but sobering www.science.org/doi/10.1126/...
science.org
Coupled, decoupled, and abrupt responses of vegetation to climate across timescales
Climate and ecosystem dynamics vary across timescales, but research into climate-driven vegetation dynamics usually focuses on singular timescales. We developed a spectral analysis–based approach that...
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Reposted by Johan Renaudie
Sandra Passchier @passchier.bsky.social · 01/07/2025
Check out our latest #IODP #Exp379 contribution about the #Antarctic Ice Sheet's history @natcomms.nature.com. Read the full article here: rdcu.be/euikE
rdcu.be
West Antarctic ice retreat and paleoceanography in the Amundsen Sea in the warm early Pliocene
Nature Communications - A geological climate archive documents the effects of ocean warming on Antarctic marine ice-sheets. Large sediment fluxes from the interior of West Antarctica precede the...
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Johan Renaudie @plannapus.bsky.social · 30/06/2025
Is it just for me or are all the IODP Proceedings currently unreachable? I'm getting Error 403 on all of them and the individual DOIs lead to Error: DOI not found.
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Johan Renaudie @plannapus.bsky.social · 07/05/2025
Now published online in Current Biology! www.cell.com/current-biol...
cell.com
Extant diversity, biogeography, and evolutionary history of Radiolaria
Sandin et al. reveal a vast, overlooked molecular diversity of Radiolaria, likely skeleton-less, contrasting the traditional view of their star-shaped skeleton. Such comprehensive Radiolaria diversity...
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Johan Renaudie @plannapus.bsky.social · 22/04/2025
And it is finally out! bg.copernicus.org/articles/22/...
bg.copernicus.org
Cenozoic pelagic accumulation rates and biased sampling of the deep-sea record
Abstract. Global weathering is the primary control of the Earth's climate over geologic timescales, converting atmospheric pCO2 into dissolved bicarbonate, with carbon sequestration by marine plankton...
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John Burns @burnsajohn.bsky.social · 24/11/2024
A bunch of cells of the nasselarian radiolarian Plagiacantha arachnoides--like a group of little spiders! Plus a couple of bonus acantharians. From the gulf of maine #protistaday #protistsonsky #marinelife
A group of radiolarians isolated from a plankton tow.
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Serjoscha Evers @sirjoscha.bsky.social · 14/11/2024
Second paper in Ecology & Evolution out in two consecutive days! 🐢🤩🐢 "Functional and character disparity are decoupled in turtle mandibles", w team fr MfN Berlin (incl. @plannapus.bsky.social) I guess the German chancellor would call this a "Doppel-Wumms" 😜 onlinelibrary.wiley.com/doi/10.1002/...
onlinelibrary.wiley.com
Functional and Character Disparity Are Decoupled in Turtle Mandibles
Here, we compare functional disparity measured by biomechanical proxies and character disparity measured by discrete morphological characters in turtle jaws. Exploration of mandibular patterns reveal...
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John Burns @burnsajohn.bsky.social · 11/11/2024
"The death of an acantharian" Or: why we don't have fossil acantharian skeletons like we do for their glassy and chalky cousins. I think in this case it might somehow be an active process--acantharian skeletons from cells that swarm away last longer.
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Johan Renaudie @plannapus.bsky.social · 30/10/2024
Sarah, Dave and I just got a small piece published in PAGES Magazine on the legacy of IODP in term of evolutionary studies and conservation biology (with radiolarians as case study): doi.org/10.22498/pag...
doi.org
Radiolaria as a study system for marine plankton in a changing climate | PAGES
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Johan Renaudie @plannapus.bsky.social · 09/10/2024
Happy to have collaborated on this with Miguel! A new time-calibrated molecular phylogeny of radiolarians with insights on their hidden diversity 🧪
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Miguel Méndez Sandín @sandinmm.eurosky.social · 09/10/2024
Radiolaria are known for their elaborate and gorgeous skeletons, found all over our oceans. But what if I tell you that half of their diversity might be naked!? www.biorxiv.org/content/10.1...
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Johan Renaudie @plannapus.bsky.social · 14/06/2024
New article from our student Gabrielle, on Late Eocene paleoproductivity in the Southern Ocean! 🧪 cp.copernicus.org/articles/20/...
cp.copernicus.org
Late Eocene to early Oligocene productivity events in the proto-Southern Ocean and correlation to climate change
Abstract. The Eocene–Oligocene transition (EOT, ca. 40–33 Ma) marks a transformation from a largely ice-free to an icehouse climate mode that is well recorded by oxygen-stable isotopes and sea surface...
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Johan Renaudie @plannapus.bsky.social · 03/01/2024
Our latest study using the Neptune database is out as a preprint. Long story short: we tried to replicate past estimates of global sedimentation rates during the Cenozoic and noticed biases that went previously ignored and tried to correct them. egusphere.copernicus.org/preprints/20...
egusphere.copernicus.org
Cenozoic pelagic accumulation rates and biased sampling of the deep sea record
Abstract. Global weathering is a primary control of the earth's climate over geologic time scales: converting atmospheric pCO2 into dissolved bicarbonate; with carbon sequestration by marine plankton ...
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Wolfgang Kiessling @kiessl.bsky.social · 08/12/2023
The first finely resolved CO2-curve for the last 66 million years. Almost identical to the temperature curve. Little room for other drivers than greenhouse gasses to control Earth's climate. www.science.org/doi/10.1126/...
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Johan Renaudie @plannapus.bsky.social · 22/11/2023
A message to the Neptune database users: the website and the database server are not currently accessible. An alternate access is available though as (versioned) backups of the database are now available on Zenodo (doi.org/10.5281/zeno...). (1/4)
doi.org
Archive of Neptune (NSB) database backups
This is the state of the Neptune (NSB) database (http://nsb.mfn-berlin.de) as of 2023-06-05 archived by Johan Renaudie..The database is given as a native PostgreSQL backup (nsb_postgresql.zip) and is ...
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