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Jorge A. Giraldo

@jagiral1.bsky.social
1.5K followers 744 following 29 posts

Interested in ecology, dendrochronology, and plant physiology.

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Reposted by Jorge A. Giraldo
New Phytologist @newphyt.bsky.social · 07/07/2026
#Arabidopsis: a model for wood research Alicja Dolzblasz, et al. nph.onlinelibrary.wiley.com/doi/10.1111/... #PlantScience
Structure of the stem and the hypocotyl during primary growth.
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Jorge A. Giraldo @jagiral1.bsky.social · 11/04/2026
What if we could track forest growth faster than plots? Check out our new work! #TreeRings #Dendrochronology doi.org/10.1016/j.de...
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Jorge A. Giraldo @jagiral1.bsky.social · 20/03/2026
Tropical Alder (Alnus acuminata) tree rings.
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Reposted by Jorge A. Giraldo
Isabel González @anaigmendez.bsky.social · 16/02/2026
Excited to have this paper out showing a strong coupling between Central American tree-ring oxygen isotopes and ocean–atmosphere dynamics (interbasin SST gradients, ITCZ, CLLJ... ). Many thanks to all co-authors! agupubs.onlinelibrary.wiley.com/doi/10.1029/...
agupubs.onlinelibrary.wiley.com
Oxygen Isotopes in Tree Rings Track Neotropical Climate Dynamics
Tree-ring δ18O from Abies guatemalensis in Central America captures interannual variations in boreal summer rainfall Lighter δ18O years are associated with a weakening of the Caribbean Low-Level ...
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Magdalena Held @pinuscaelestis.bsky.social · 27/01/2026
Our paper is out 🎉🌲🌳 Conduit and pit dimensions scale in a coordinated way from the treetop to coarse roots in three boreal tree species. academic.oup.com/treephys/art...
academic.oup.com
Conduit and pit dimensions scale in a coordinated way from the treetop to coarse roots in three boreal tree species
Abstract. Xylem conduits widen with distance from the treetop (dtreetop), counteracting most of the resistance to water transport which accumulates with tr
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Reposted by Jorge A. Giraldo
Kevin Anchukaitis @thirstygecko.bsky.social · 24/11/2025
Join the Laboratory of Tree-Ring Research at the University of Arizona for our 2026 Dendrochronology Intensive Summer Course (DISC)! Spend 3 great weeks (May 18th to June 5, 2026) in the field, lab, and classroom learning first-hand how tree-ring research is done! ltrr.arizona.edu/summerschool
ltrr.arizona.edu
Dendrochronology Intensive Summer Course (DISC) 2026 | Laboratory of Tree-Ring Research
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Reposted by Jorge A. Giraldo
WSL Umweltforschung @wslresearch.bsky.social · 21/10/2025
🍂🌳 #PhDAlert! MSc in #EnvironmentalSciences or a related field and interested in plant #phenology and #ecophysiology? Good level of fitness to carry out field work in remote locations? Our #Ecosystem #Ecology group offers a #PhD position: apply.refline.ch/273855/1789/... #ScienceJobs
Job offer: The Swiss Federal Institute for Forest, Snow and Landscape Research WSL is part of the ETH Domain. Approximately 600 people work on the sustainable use and protection of the environment and on the handling of natural hazards.

The Forest and Soil Ecology research unit, which investigates the effects of environmental changes in forest ecosystems, is looking for a person to join the Ecosystem Ecology group for a fixed-term period of four years, starting January 2026 or by appointment, as a
PhD student in plant phenology and ecophysiology
You will be responsible for planning and carrying out experiments in the field and under controlled conditions in the SNF funded project “Linking carbon source-sink dynamics to autumn phenology: Predicting tree growth rhythms in temperature and boreal forests”. You will analyse the interaction between carbon balance and phenology by applying various ecophysiological and biochemical methods and large-scale data analyses. You will carry out statistical and mechanistic modelling approaches. Finally, you will be responsible for publishing results in scientific journals.
You have a master’s degree in environmental science, or a comparable topic and are interested in applying various methods, from ecophysiology to model applications. You have a proficient command of written and spoken English, are able to work in a structured, efficient and independent manner, and have a high level of team spirit. Furthermore, you have a good level of fitness to carry out field work in remote locations. We offer an international team with exciting research perspectives and strong collaboration with researchers from ETH and international institutions. The position will be based at WSL and you will be enrolled at ETH Zurich.
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Reposted by Jorge A. Giraldo
Journal of Ecology @journalofecology.bsky.social · 19/10/2025
🪵 Diameter drives short-term biomass gains, but long-term carbon storage hinges on wood density, especially in humid forests. To improve accuracy, biomass models should account for radial wood density variation and climate ☁️ 🔎 Find out more: buff.ly/kZFoh9B
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Jorge A. Giraldo @jagiral1.bsky.social · 12/10/2025
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 · 13/09/2025
Transverse section of Weinmannia pubescens.
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Reposted by Jorge A. Giraldo
Pieter Zuidema @pieterzuidema.bsky.social · 29/08/2025
#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/...
besjournals.onlinelibrary.wiley.com
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...
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Reposted by Jorge A. Giraldo
Forestry - An Int. Journal of Forest Research @forestryoup.bsky.social · 27/08/2025
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 · 10/08/2025
🚀 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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Pieter Zuidema @pieterzuidema.bsky.social · 31/07/2025
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)
doi.org
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...
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Andrés Bravo-Oviedo @abforestal.bsky.social · 28/06/2025
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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ForestPlots @forestplots.bsky.social · 17/06/2025
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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Pieter Zuidema @pieterzuidema.bsky.social · 11/06/2025
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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Margaret Evans @mekevans.bsky.social · 12/06/2025
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.
science.org
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,...
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Danielle Creek @daniellecreek.bsky.social · 27/05/2025
🪧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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PlotToSat @plottosat.bsky.social · 24/05/2025
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
youtube.com
PlotToSat :)
YouTube video by Milto Miltiadou
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Reposted by Jorge A. Giraldo
WSL Umweltforschung @wslresearch.bsky.social · 14/05/2025
🌲🖥️ #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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Reposted by Jorge A. Giraldo
Shawan Chowdhury @shawan-chowdhury.bsky.social · 28/04/2025
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 · 22/04/2025
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...
botany.one
Adriana Corrales: Plants Are Not Alone
Botany One interviews Dr Adriana Corrales, a researcher fascinated with the intricate relationships between plants and fungi.
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Charlotte Grossiord @charlottegrossiord.bsky.social · 22/04/2025
🌳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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Kevin Anchukaitis @thirstygecko.bsky.social · 21/04/2025
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....
agupubs.onlinelibrary.wiley.com
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-...
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Reposted by Jorge A. Giraldo
Ronald Visser @ronaldvisser.bsky.social · 20/04/2025
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.com
GitHub - RonaldVisser/Download_ITRDB
Contribute to RonaldVisser/Download_ITRDB development by creating an account on GitHub.
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Olivier Morissette @omorissette.bsky.social · 14/02/2025
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...
theconversation.com
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.
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Melaine Le Roy @subfossilguy.bsky.social · 03/04/2025
🌲 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 · 01/04/2025
Beautiful wood and tree rings of Albizia guachapele. #TreeRingTuesday #dendro #dendrochronology #TreeRings
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Jorge A. Giraldo @jagiral1.bsky.social · 27/03/2025
Productive day in the field with great sampling and data collection! #dendrometers #TreeRings
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Miguel D. Mahecha @miguelmahecha.bsky.social · 23/03/2025
🌍 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.
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Magdalena Held @pinuscaelestis.bsky.social · 12/03/2025
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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Stephen Spitewinter @spitewinter.bsky.social · 21/03/2025
#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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Ecography @ecography.bsky.social · 21/03/2025
Marcescence and prostrate growth in tree ferns are adaptations to cold tolerance nsojournals.onlinelibrary.wiley.com… #Biogeography #PlantEvolution #Ecophysiology
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Christine Eriksen @drceriksen.bsky.social · 21/03/2025
Do you have 15+ years of fire research experience, a strong publication record, and editorial experience? The Association for Fire Ecology (@afe-fireecology.bsky.social) is seeking a new Editor-In-Chief for its international scientific journal, Fire Ecology: fireecology.org/jobs-posts/f...
fireecology.org
Editor-in-Chief, Fire Ecology Journal — Association for Fire Ecology
The Association for Fire Ecology (AFE) welcomes applicants for the esteemed position of Editor-In-Chief (EIC) for the society’s international scientific journal, Fire Ecology.
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Cat Scott @catzigle.bsky.social · 17/03/2025
We're recruiting a Postdoctoral Research Fellow in Forest Carbon Storage @universityofleeds.bsky.social! You'll be part of @safenet-eu.bsky.social project, mapping above + below-ground C stocks in European forests 🛰️🌳💻🌲 jobs.leeds.ac.uk/Vacancy.aspx... @leedsleaf.bsky.social @envleeds.bsky.social
jobs.leeds.ac.uk
Job Opportunity at University of Leeds: Research Fellow in Forest Carbon Storage
This role will be based on the university campus, with scope for it to be undertaken in a hybrid manner. We are also open to discussing flexible working arrangements.Are you a quantitative environment...
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Melaine Le Roy @subfossilguy.bsky.social · 17/03/2025
Always moving to dive into old tree's intimacy! 🌲💍⌚️ 9624 years ago, Tschierva Glacier buried a forest stand 🧊 As can be seen from the rings, 8 years earlier this tree produced a row of traumatic resin ducts following an injury, possibly caused by a flood 🌊
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Henricus Peters @learnfromnature.bsky.social · 17/03/2025
The loveliness & important role of lichens & mosses #botany
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Eva Gril @evagril.bsky.social · 10/01/2025
As my first Bluesky post, I am happy to share my moss photo (the beautiful exotic Campylopus introflexus) on the cover of the newest @journalofecology.bsky.social issue! 🌱 Here is our paper, on bryophyte and vascular plant affinity to forest microclimate: doi.org/10.1111/1365...
A close-up of a forest moss - Campylopus introflexus - the cover picture of Journal of Ecology for January 2025
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Edher Checa C @edherchecac.bsky.social · 31/12/2024
My first PhD paper was published in Plant and Soil. How is the vertical distribution of fine root biomass affected in soils with shallow water tables? How is forest structure expressed under such conditions? link.springer.com/article/10.1...
link.springer.com
Soil water regime and nutrient availability modulate fine root distribution and biomass allocation in amazon forests with shallow water tables - Plant and Soil
Background and aims Shallow water table (WT) forests (representing ~ 50% of Amazonian land areas) exhibit different characteristics and functioning compared to the more widely studied deep WT forests....
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Jorge A. Giraldo @jagiral1.bsky.social · 17/03/2025
New allometric equations to accurately measure carbon accumulation in aboveground biomass (AGB) for planted forests with native species in the tropical Andes. link.springer.com/article/10.1...
link.springer.com
Allometric equations to quantify aboveground biomass in mixed-species plantations with restoration purposes in the tropical Andes - Journal of Forestry Research
The Andean montane forests provide a wide range of ecosystem services like water supply, carbon sequestration, and biodiversity preservation. Restoration of these forests is critical due to their degr...
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Daniel Zuleta @danielfzuleta.bsky.social · 17/03/2025
Almost there! We're 94% done with the 4th full census of the 25ha Amacayacu Forest Dynamics Plot (#AmacayacuFDP) in the Colombian Amazon! 🌳 Remeasuring 130K trees wouldn’t be possible without the incredible support of UNAL students, Sinchi & the Palmeras Indigenous community—THANK YOU! 🙌"
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Jorge A. Giraldo @jagiral1.bsky.social · 16/03/2025
Fantastic study in a remarkable ecosystem! www.nps.gov/articles/000... #TreeRings #Cypress @manuelbernal.bsky.social @treeringsociety.bsky.social
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Pieter Zuidema @pieterzuidema.bsky.social · 06/03/2025
How many tropical tree species form annual growth rings? Around 500. How many #tree-ring chronologies exist there? Also 500. These data are important in #globalchange research. That s our message in review led by Peter Groenendijk. #dendrochronology #forest www.sciencedirect.com/science/arti...
sciencedirect.com
The importance of tropical tree-ring chronologies for global change research
Tropical forests and woodlands are key components of the global carbon and water cycles. Yet, how climate change affects these biogeochemical cycles i…
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Elisabet Martínez-Sancho @elimartinezs.bsky.social · 05/03/2025
I am very happy to announce that the Dendrolabs of @wslresearch.bsky.social and @biologiaub.bsky.social will be co-organizing the 35th European Dendroecological Fieldweek in the Pyrenees! It's the perfect opportunity to learn about dendrochronology and have fun in a beautiful landscape! Details 👇
wsl.ch
35th European Dendroecological Fieldweek
We are pleased to announce the 35th European Dendroecological Fieldweek, taking place from August 29 to September 5. This event will be held in the town of Son (Spain) at the heart of the Catalan Pyre...
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Pedro Peres-Neto @comecology.bsky.social · 03/03/2025
This is growing; let me know which societies we're missing. Add this to your browser's bookmarks for easy access to explore their publications (see posts of each journal in the pack) or to discover potential outlets for your research: go.bsky.app/2YNcEzK
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Pauline Grierson @pfgblue.bsky.social · 26/02/2025
Fantastic funded PhD opportunities (plant nutrition & physiology) at The University of Western Australia! PhD# 1 - N acquisition efficiency in canola using non-invasive microelectrode ion flux PhD#2 N translocation efficiency (15N-isotope labelling). Contact sergey.shabala@uwa.edu.au for info!
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Pieter Zuidema @pieterzuidema.bsky.social · 26/02/2025
A century of rising CO₂ has increased photosynthesis of mature trees in tropical forests. This is our conclusion in study led by Sophie Zwartsenberg in @newphyt.bsky.social. We did novel isotope analyses in tree rings from Australia, Thailand & Bangladesh. nph.onlinelibrary.wiley.com/doi/full/10....
nph.onlinelibrary.wiley.com
Centennial‐scale atmospheric CO2 rise increased photosynthetic efficiency in a tropical tree species
Tropical forests substantially influence the terrestrial carbon sink. Their contributions to the forest carbon sink may increase due to the stimulation of photosynthesis by rising atmospheric CO2 (C...
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Jorge A. Giraldo @jagiral1.bsky.social · 25/02/2025
New experiment! 🌧️💧 We’ve just set up a rain collector for stable isotope analysis to trace water sources. Excited to see what the data reveals over time! Inspired and supported by @Lina Pérez-Angel. #StableIsotopes #Rainwater #EnvironmentalScience
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Jorge A. Giraldo @jagiral1.bsky.social · 20/02/2025
Incredible experience at the first-ever Dendrochronology meeting in Colombia! Amazing people, full of knowledge and ideas. Truly unforgettable! 🌳💍🇨🇴
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