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Jorge A. Giraldo @jagiral1.bsky.social · 3d

New undergraduate research explores the anatomy of three native tree species from Colombia’s Chocó biogeographic region.
revistas.humboldt.org.co/index.php/bi...

Macroscopic features: A) Cassipourea guianensis (aceitillo); B) Qualea lineata(pomo); C) Goupia glabra (chaquiro). Arrows indicate tree rings.

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Jorge A. Giraldo @jagiral1.bsky.social · Sep 13

Transverse section of Weinmannia pubescens.

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Reposted by Jorge A. Giraldo

Pieter Zuidema @pieterzuidema.bsky.social · Aug 29

#Tree stems accumulate biomass by adding volume of certain density. Which factor is more important?

Using tropical #treering data we found: diameter increment explains biomass growth at short term; wood density at long term.🌎🌐🍁
#dendrochronology
besjournals.onlinelibrary.wiley.com/doi/10.1111/...

Biomass production of tropical trees across space and time: The shifting roles of diameter growth and wood density

Diameter growth is an important and good indicator of forest carbon production. However, size-related changes in wood density, which are usually neglected, are critical for accurate short- and long-t...

besjournals.onlinelibrary.wiley.com

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Reposted by Jorge A. Giraldo

Forestry - An Int. Journal of Forest Research @forestryoup.bsky.social · Aug 27

Have you seen our collection of high-impact articles?

Take a look at the most read and cited papers of the last two years at Forestry with topics ranging from:

🌳 Forest monitoring
💻 Deep learning
🍂 Ash dieback and more!

academic.oup.com/forestry/pag...

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Reposted by Jorge A. Giraldo

Qiusheng Wu @giswqs.bsky.social · Aug 10

🚀 New Feature in Leafmap – Interactive Time-Series Visualization! 🌍🛰️

Leafmap now supports time sliders for visualizing large collections of remote sensing images.

Try it out
Web App: huggingface.co/spaces/giswq...
Notebook: leafmap.org/maplibre/tim...

#geospatial #leafmap #opensource #mapping

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Reposted by Jorge A. Giraldo

Pieter Zuidema @pieterzuidema.bsky.social · Jul 31

How do tropical #trees deal with droughts? The answer is published today in @science.org

Our pantropical #treering analysis revealed 2.5% growth reduction during #drought years. Yet, growth declined by >10% in 1/4 of 500 study sites, and in hotter & drier regions.

doi.org/10.1126/scie...
🌍🍁🌐
(1/4)

Pantropical tree rings show small effects of drought on stem growth

Increasing drought pressure under anthropogenic climate change may jeopardize the potential of tropical forests to capture carbon in woody biomass and act as a long-term carbon dioxide sink. To evalua...

doi.org

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Reposted by Jorge A. Giraldo

Andrés Bravo-Oviedo @abforestal.bsky.social · Jun 28

Nuestra propuesta para crear la Red Iberoamericana de Adaptación al cambio global de Bosques Amenazados - RIABA 🌎🌍 ha obtenido financiación del programa Lincglobal del @csic.es 1/2

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Reposted by Jorge A. Giraldo

ForestPlots @forestplots.bsky.social · Jun 17

The seasonality of the Amazon water cycle is intensifying.
-> Bruno Cintra and colleagues use decades of oxygen isotopes in tree rings to show how the dry season has got drier, and the wet season wetter.

www.nature.com/articles/s43...

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Reposted by Jorge A. Giraldo

Pieter Zuidema @pieterzuidema.bsky.social · Jun 11

New paper on tropical #timber #tracing! We tested the use of wood oxygen stable isotopes (δ18O ) for tracing. We produced #isoscapes for 5 major tropical timbers. These isoscapes alone had limited utility. Combinations with other techniques may help. #timtrace
www.sciencedirect.com/science/arti...

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Reposted by Jorge A. Giraldo

Margaret Evans @mekevans.bsky.social · Jun 12

New in @sciencemagazine, a review on Scaling plant responses to heat (www.science.org/doi/10.1126/...). Increased temperature along with acute heat waves threaten the ability of terrestrial vegetation to act as a carbon sink, but predicting how plants will respond to heat is challenging.

Scaling plant responses to heat: From molecules to the biosphere

Predicting plant responses to rising temperatures, including acute heat waves and hot droughts of varying intensity and duration, is central to addressing the climate and biodiversity crises. However,...

www.science.org

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Reposted by Jorge A. Giraldo

Danielle Creek @daniellecreek.bsky.social · May 27

🪧Calling all researchers working with #dendrometers. The #NordicDendroNetwork is holding its first meeting 13-15 October in Norway. For more information and registration go to >>> shorturl.at/HqoFY

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Reposted by Jorge A. Giraldo

PlotToSat @plottosat.bsky.social · May 24

This tutorial will guide you through the core functionalities of PlotToSat. It will help you quickly extract Sentinel-1 🛰️ and Sentinel-2 🛰️ time series at multiple plot regions. The centres of the plots are defined in an input .csv file.
#EO #ML #time-series #forests 🌲
@drmiltiadou.bsky.social

PlotToSat :)

YouTube video by Milto Miltiadou

www.youtube.com

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Reposted by Jorge A. Giraldo

WSL Umweltforschung @wslresearch.bsky.social · May 14

🌲🖥️ #PhDAlert! MSc in a #natural #science & experience with #tree-ring analysis and statistical software (R)? Fluent in English and ready for #fieldwork? Our #forest dynamics #research unit is looking for a #PhD candidate in #dendroecology and #ecophysiology! apply.refline.ch/273855/1736/...

PhD candidate in Dendroecology and Ecophysiology
The project involves fieldwork, lab analyses and manipulative experiments. The research sites are located in the Alps (Switzerland), Pyrenees (Spain), and Carpathians (Romania), and the experimental study will be conducted in Switzerland. You will apply dendroecological techniques to measure and analyse carbon and oxygen isotope ratios in the cellulose of tree rings as proxies of physiological changes. Additionally, you will participate in an experimental study on saplings growing along an elevational transect in the Alps, examining their morphological, physiological, and phenological responses to climate stressors (heat, drought, and frost). Ultimately, the goal is to rank species by their sensitivity to recent and future climatic stressors, helping forest managers select the most resilient species for each elevation zone.
You hold a Master’s degree in forest ecology, ecology, plant physiology, environmental science, or a related field. Ideally, you already have experience with tree-ring analysis, ecophysiology, or climate data analysis. You have a good command of English, enjoy working collaboratively, and are comfortable using statistical software, preferably R. You are in good physical condition so that you can move safely over rough terrain. In addition, you are independent, self-motivated, and eager to take on a challenging project that will contribute to a deeper understanding of how climate change affects forest ecosystems. This position offers an exciting opportunity for those seeking a career in dendroecology, ecophysiology, or climate change science. You will work in an international research environment with access to cutting-edge methods and collaboration opportunities in Spain and Romania. Working place will be at WSL in Birmensdorf (approx. 20 min outside of Zurich); PhD enrolment will be at University of Bern.

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Shawan Chowdhury @shawan-chowdhury.bsky.social · Apr 28

Please share. We are hiring domestic/international #PhD students to work on citizen science, insect migration/conservation at Monash University in Melbourne, Australia. If interested, please email me. You can find more about our research interests here. shawanchowdhury.com.

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Carlos A. Ordóñez-Parra @caordonezparra.bsky.social · Apr 22

In my latest interview for @botany.one, @adricorrales.bsky.social reminds us that plants are not alone; they thrive in association with many other organisms such as fungi and bacteria. #SciComm #PlantScience #Botany 🧪🍄 botany.one/2025/04/adri...

Adriana Corrales: Plants Are Not Alone

Botany One interviews Dr Adriana Corrales, a researcher fascinated with the intricate relationships between plants and fungi.

botany.one

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Reposted by Jorge A. Giraldo

Charlotte Grossiord @charlottegrossiord.bsky.social · Apr 22

🌳Urban trees keep cooling - even during record-breaking heatwaves! We show that trees maintained high transpiration, defying model predictions. Tree cooling during heat may be underestimated 🌡️💦
Great study led by Christoph Bachofen @wslresearch.bsky.social doi.org/10.1016/j.uf...

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Reposted by Jorge A. Giraldo

Kevin Anchukaitis @thirstygecko.bsky.social · Apr 21

Nice commentary and perspective titled 'Challenges and Opportunities in Tropical Dendrochronology for Climate Reconstructions' by Jorge Giraldo et al. on the recent neotropical tree ring paper by @anaigmendez.bsky.social agupubs.onlinelibrary.wiley.com/doi/full/10....

Challenges and Opportunities in Tropical Dendrochronology for Climate Reconstructions

Dendrochronology is applicable in the tropics Several tree species exhibit annual tree rings across diverse environmental conditions The challenge in tropical dendrochronology is to create tree-...

agupubs.onlinelibrary.wiley.com

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Ronald Visser @ronaldvisser.bsky.social · Apr 20

I have written a small R-script to download all tree-ring data from the ITRDB (measurements and chronologies). Anyone can create a local copy, just in case the data might not be available anymore from @noaa.gov

github.com/RonaldVisser...

#dendrochronology #treering #opendata #share

GitHub - RonaldVisser/Download_ITRDB

Contribute to RonaldVisser/Download_ITRDB development by creating an account on GitHub.

github.com

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Reposted by Jorge A. Giraldo

Olivier Morissette @omorissette.bsky.social · Feb 14

Many living have their own "tree rings", including fish; the magnificient otolith! Learn more about this fantastic structure in this @theconversation.com article, written by our dear @otolithgirl.bsky.social #otolith #fish #treering #dendrochronology theconversation.com/most-animals...

Most animals have their own version of tree rings – here’s how we biologists use them to help species thrive

From whale earwax to bird feathers, almost all organisms keep a record of their existence.

theconversation.com

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Reposted by Jorge A. Giraldo

Melaine Le Roy @subfossilguy.bsky.social · Apr 3

🌲 Sample of the day! 🌲

A late-Holocene subfossil larch from Aletsch Glacier, fresh from the sanding machine! 🥰

Can't wait to measure and date it! 💍⌛

#TreeRing #Dendrochronology #Art

Close up picture of well defined tree rings of a subfossil larch trunk found in glacial sediments at the Great Aletsch Glacier.
A well visible compression wood area can be observed around ring n°9, which means the tree had some issues to maintain apical growth during that year due to some disturbance (avalanche, landslide, etc...?)

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Jorge A. Giraldo @jagiral1.bsky.social · Apr 1

Beautiful wood and tree rings of Albizia guachapele. #TreeRingTuesday #dendro #dendrochronology #TreeRings

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Jorge A. Giraldo @jagiral1.bsky.social · Mar 27

Productive day in the field with great sampling and data collection! #dendrometers #TreeRings

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Miguel D. Mahecha @miguelmahecha.bsky.social · Mar 23

🌍 PhD student wanted in AI for Climate Extremes 🌿

Heatwaves, droughts, and heavy rain are intensifying—threatening vegetation, forestry, and agriculture. Join us to develop weakly supervised ML to detect and explain climate impacts in satellite data.

ScaDS.AI Dresden/Leipzig @scadsai.bsky.social · Mar 20

@scadsai.bsky.social offers 34 open topics for Research Associates / PhD Students (f/m/x) within the Graduate School, together with mentors and host institutions. 👩‍🎓 In the upcoming days, we will introduce you to all of those areas and the corresponding topics.

👉 scads.ai/about-us/job...

An advertisement from ScaDS.AI Dresden Leipzig featuring an opportunity for 34 Research Associate and PhD Student positions (f/m/x). The focus areas include knowledge representation and inference, mathematical foundations of AI and representation learning, scalable machine learning (ML) and LLM inference, time series analysis and reinforcement learning, visualization and causal inference, and ML ethics for protein design and chemical reactions. Applications are due by April 9, 2025.

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Reposted by Jorge A. Giraldo

Magdalena Held @pinuscaelestis.bsky.social · Mar 12

I just moved here from twitter. To celebrate here is my favorite foto of Pinus sylvesteis root xylem.
#xylem #trees #wood

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Reposted by Jorge A. Giraldo

Stephen Spitewinter @spitewinter.bsky.social · Mar 21

#plants #history #botany #art 🌱

Capsicum annum - Chilli Pepper (many varieties)

Popular spices, origins in Central Americas. Used by pre-Columbian civilisations from 4,000 BCE.

Home cultivation -
www.thompson-morgan.com/how-to-grow-...

Global dispersion map -
powo.science.kew.org/taxon/urn:ls...

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