JD Bontemps
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jdbontemps.bsky.social
JD Bontemps
@jdbontemps.bsky.social
Researcher. Silvologist at @IGNFrance, head of Laboratory of Forest Inventory (LIF) Forests, Inventory, Growth, CC, Modelling, Monitoring (views are my own)
Pinned
10 years ago, we had this idea of using tree cores of the French NFI @ignfrance.bsky.social to massively measure wood density in a medical scanner @inrae-france.bsky.social. This is now done for +100000 cores in +150 species. Congrats to Leban & colleagues Inrae/NFI ! www.nature.com/articles/s41...
XyloDensMap: a georeferenced dataset for the wood density of 110,000 trees from 156 European species in France - Scientific Data
Scientific Data - XyloDensMap: a georeferenced dataset for the wood density of 110,000 trees from 156 European species in France
www.nature.com
Reposted by JD Bontemps
Il n’est même pas à 100 jours !
April 4, 2025 at 6:33 PM
Enfin @radiofrance.fr ! Il n’est pas question « d’évaluer la « qualité physique » des collégiens »… condition, forme sans doute, mais n’en rajoutons pas ! www.francetvinfo.fr/sports/inter...
INTERVIEW. "Cette mesure nous met en colère et est complètement inutile", conteste le syndicat Snep-FSU après l'annonce de tests de forme physique au collège
Dès la rentrée prochaine, des tests de forme physique seront généralisés à l'échelle nationale chez les collégiens de sixième.
www.francetvinfo.fr
April 3, 2025 at 8:23 PM
Reposted by JD Bontemps
Multiple phase pollarding, or the Babdook's fingers? Beautiful hornbeams of Epping
March 25, 2025 at 7:30 PM
10 years of ago, LIF @ignfrance.bsky.social had this idea that investing the monitoring of CC impacts on forests was a major priority. Accordingly - and unfortunately - French forests are now showing a widespread growth decline, as evidenced by Lionel Hertzog www.sciencedirect.com/science/arti...
Turning point in the productivity of western European forests associated with a climate change footprint
•Global changes, such as changing climate, are affecting forest productivity worldwide. Observed trends in productivity are depending on the focal spa…
www.sciencedirect.com
March 11, 2025 at 11:37 AM
10 years ago, we had this idea of using tree cores of the French NFI @ignfrance.bsky.social to massively measure wood density in a medical scanner @inrae-france.bsky.social. This is now done for +100000 cores in +150 species. Congrats to Leban & colleagues Inrae/NFI ! www.nature.com/articles/s41...
XyloDensMap: a georeferenced dataset for the wood density of 110,000 trees from 156 European species in France - Scientific Data
Scientific Data - XyloDensMap: a georeferenced dataset for the wood density of 110,000 trees from 156 European species in France
www.nature.com
March 11, 2025 at 11:28 AM
10 years ago, we had this idea of a theoretically grounding the estimators of the French NFI @ignfrance.bsky.social … This is now done, further with new simulation facilities based on digital twins. Congrats to our PhD student Trinh Duong ! academic.oup.com/jssam/articl...
A New Sampling Framework for Spatial Surveys with Application to the French National Forest Inventory
Abstract. The French National Forest Inventory (NFI) employs a two-stage two-phase sampling scheme summarized by the following key steps: first, the territ
academic.oup.com
March 11, 2025 at 11:21 AM
LIF lab happy to celebrate its 10 year anniversary 🎂 @ignfrance.bsky.social #ENSG today during the IGN research days ! Also 40th anniversary of IGN research, that allowed LIF’s birth. Thanks to all contributing energies over these years !
March 11, 2025 at 11:17 AM
FC Haybes, Ardennes. De l’exploitation forestière sur un territoire pressenti pour une forêt primaire 😂
January 28, 2025 at 10:09 AM
Reposted by JD Bontemps
❗Finland’s #forests have become a source of carbon, according to the preliminary inventory data from @luke.fi. The change is attributed to increased logging, rising emissions in #peatland forests and declining #carbon sink of mineral soils.

➡️ Read more: www.icos-cp.eu/news-and-eve...
Finland's forests have become a source of carbon
The latest preliminary data from Finland's 2023 greenhouse gas inventory reveals that forests have shifted from being a carbon sink to a carbon source. The latest inventory indicates that forests beca...
www.icos-cp.eu
January 23, 2025 at 11:37 AM
#FRA2020 Over 1990-2020, the global forest wood stock has remained stationary, moving from 559.7 billion m3 to 556.5 billions. Despite increasing growing stock density in almost all regions of the world, deforestation predominates in influencing the global stock. There is no global forest C sink.
January 22, 2025 at 3:57 PM
Please to announce this nice piece of work at #LIF lab, or how challenges raised by #NFI surveys to survey sampling theory have been handled. Congrats to Trinh Duong, our PhD student funded by U Lorraine & IGN ! academic.oup.com/jssam/advanc...
A New Sampling Framework for Spatial Surveys with Application to the French National Forest Inventory
Abstract. The French National Forest Inventory (NFI) employs a two-stage two-phase sampling scheme summarized by the following key steps: first, the territ
academic.oup.com
December 16, 2024 at 8:25 PM
Just like a meeting between matter and antimatter will not produce a peaceful event, an issue may « soon » be that between life and mirror (chirality) life (via @scientificamerican.bsky.social) www.science.org/doi/10.1126/...
Confronting risks of mirror life
Broad discussion is needed to chart a path forward.
www.science.org
December 16, 2024 at 8:13 PM
Reposted by JD Bontemps
Canada's new satellite-based forest inventory (#SBFI) uses image segmentation to create detailed, stand-level maps for forest science & monitoring, including tree species and #biomass, available via open access. #Landsat
📜Paper: doi.org/10.1093/fore...
🔗Data: opendata.nfis.org/mapserver/nf...
November 19, 2024 at 9:02 PM
Cycles of life
November 28, 2024 at 8:42 PM