Dr. Joan Dudney
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dudney-joan.bsky.social
Dr. Joan Dudney
@dudney-joan.bsky.social

Assistant Professor @ucsantabarbara Global Change Forest Ecologist @switzernetwork @SmithFellows @PeaceCorps #BLM

Environmental science 80%
Geography 20%
Pinned
Disturbance interactions have profound consequences for forest health, yet remain poorly understood.

Here we use DAGs to differentiate #Synergisms, #CompoundDisturbances & #NetworkEffects and review the impacts of climate change.

Final version out now! 🧪🌐🍁🌱
www.annualreviews.org/content/jour...
Global analysis shows that atmospheric dryness explains geographical patterns of tree canopy height and is projected to become more important in the coming decades:
www.nature.com/articles/s41...
Global dependency of canopy height on vapour pressure deficit and its projections under climate change - Nature Ecology & Evolution
Rising atmospheric aridity may be an important driver of tree growth. Here the authors present analyse the global relationship between tree canopy height and vapour pressure deficit, and its potential...
www.nature.com
Published!📖

Forest structural and functional diversity can attenuate forest productivity losses after harvesting and fires. In undisturbed forests, dominance boosts productivity via selection effects, but not after harvesting🌳🌲🌍

Read here:https://buff.ly/Gw5Hq6X

Reposted by Joan Dudney

Old-growth forests 🌲store lots of carbon and support biodiversity. Recent study of 3,503 tree rings across Europe shows that older forests, especially those with large trees, are crucial for long-term carbon storage, highlighting the need to protect them.👍
www.sciencedirect.com/science/arti...
Fascinated to learn that we are still discovering new species at the highest rate ever. Mapping Earth's biodiversity is far from over, and while we learn more and more about it, let's protect what we do know as well as we can!
www.science.org/doi/10.1126/...
The past and future of known biodiversity: Rates, patterns, and projections of new species over time
The number of known species on Earth is increasing rapidly, suggesting unexpectedly large numbers of many groups.
www.science.org
Sorry @nytimes.com , for those of us in the sciences, this is not a "quiet policy change". 🧪🦠💊🌍 It is however a disaster for society.
The U.S. Is Funding Fewer Grants in Every Area of Science and Medicine www.nytimes.com/interactive/...
The U.S. Is Funding Fewer Grants in Every Area of Science and Medicine
A quiet policy change means the government is making fewer bets on long-term science.
www.nytimes.com

Reposted by Joan Dudney

Why is Southwest Virginia a hotspot for tick-borne diseases? And what are people doing about it? My latest in the @pulitzercenter.org -funded climate/health series for @wvtf.bsky.social in partnership with @climatecentral.org.
www.wvtf.org/news/2025-12...
🧪🌎 #publichealth #climatechange
Nice preprint for eco evo folk to check out from @sfwalmsley.bsky.social and colleagues - Towards a causal understanding of bidirectional effects in ecology and evolution - ecoevorxiv.org/repository/v... #causalinference 🌍
Towards a causal understanding of bidirectional effects in ecology and evolution
ecoevorxiv.org

Reposted by Joan Dudney

Watched S5 E1 ("The Crawl") of #StrangerThings last night & was thrilled to see gorgeous examples of drill holes made by a yellow-bellied sapsucker (Sphyrapicus varius) in the trunk of what's likely a loblolly pine (Pinus taeda); Will Byers (Noah Schnapps) for scale. 🧪🌲🪵🐦🕳️

Reposted by Joan Dudney

Good morning everyone. Today in “One day, one paper”, mixed forests in China’s Loess Plateau show deeper water uptake and stricter stomatal regulation, enhancing resilience under drought and offering key insights for sustainable afforestation 🌎
A comparison of water use strategies between pure and mixed forests on the Chinese Loess Plateau
Read the free Plain Language Summary for this article on the Journal blog.
besjournals.onlinelibrary.wiley.com
Divergent Trends in Insect Disturbance Across Europe's Temperate and Boreal Forests

🔗 buff.ly/APK3ybC

Reposted by Joan Dudney

Check out our latest publication from the #FREE group at #CESAB taking a functional and trait perspective on classic metapopulation ecology led by @nmouquet.bsky.social 🧪🌐
Spatial Insurance of Distinct Ecological Functions

Communities can act as functional sources and sustain rare ecological roles across space. We reveal patterns of functional vulnerability for plants and birds

Check out our Perspective in Ecol Lett

👉 onlinelibrary.wiley.com/doi/10.1111/...

🌐🌍🦤🪴🍁🧪

This paper was made possible thanks to the many insights and deep conversations with my brilliant co-authors
@julieedtree.bsky.social @rupertseidl.bsky.social
@brian-j-harvey.bsky.social
Study area shape matters when tracking species range shifts & we may underestimate longitudinal range shifts to the benefit of latitudinal range shifts, potentially undermining drivers other than T°C 🌡

🌐🌏🌎🌍🧪🐠🐍🦋🦉🦇🌳🌲

shorturl.at/prp63
Global bias towards recording latitudinal range shifts - Nature Climate Change
The authors consider studies reporting species range shifts and demonstrate a geometric bias in sampling along latitudinal, rather than longitudinal, gradients. This bias may favour the corroboration ...
shorturl.at

Reposted by Joan Dudney

Our new study—part of the forthcoming book Andean #Herpetofauna—explores how #amphibian diversity and threats shift across the elevational zones of the #Colombian #Andes 🧪🦤🐸🌐🌎

link.springer.com/chapter/10.1...
Diversity and Extinction Risk of Colombian Andean Amphibians Across Life Regions
The Andean region in Colombia is heavily populated and has suffered significant habitat conversion and loss, which leads to declining amphibian species richness and abundance. The Colombian Andes enco...
link.springer.com
The Amazon Rainforest was shaped by people. Analysis of 262 trees species across 1,521 forest plots reveals that both pre-Columbian Indigenous peoples and European colonists enduringly influenced the forest’s relative abundance of trees. In PNAS: https://ow.ly/VAqY50XuP38
A paper in Scientific Data presents a novel global natural forest map for 2020 at 10 m resolution. This map can support forest monitoring or conservation efforts that require a comprehensive baseline for monitoring deforestation and degradation. go.nature.com/4remVIQ ⚒️ 🧪
📢 Upcoming online seminar:

Next week (26th November) at 11am CET, Alice Penanhoat @alice4science.bsky.social from Swedish University of Agricultural Sciences will talk about her interdisciplinary research on forest structure 🌲🌳🔍

Register here to join the zoom seminar:
lnkd.in/gcgh5qFE

Reposted by Joan Dudney

Central Europe’s forests face steep biomass losses and beetle outbreaks above 1.5 °C warming; staying below 2 °C keeps timber, carbon and diversity services safer, underscoring the urgency of meeting Paris Agreement targets.
#biomass
@forestecosyst.bsky.social
www.sciencedirect.com/science/arti...
Hi people. Today in "one day, one paper", thermal tolerance breadth in plants exceeds local climate ranges, shaped mainly by heat, cold, and aridity. Desert species show extreme resilience, revealing partial support for climate variability hypothesis and highlighting microclimate-driven plasticity🌎🍁
Drivers of thermal tolerance breadth of plants across contrasting biomes
The results provide partial support for the climate variability hypothesis in plants: photosystem thermal tolerance breadth was greatest in more thermally variable biomes. This relationship was large....
besjournals.onlinelibrary.wiley.com

Incredible figure! Congratulations on this insightful work!

Reposted by Joan Dudney

Unlocking Populus’ genetic blueprint! 🧬
From 707 resequenced trees, researchers built a high-density map pinpointing 89 QTLs for growth, wood, and disease traits, boosting genomic selection accuracy by up to 21%.
🔗 link.springer.com/article/10.1...

#JFR #ForestryGenomics #Populus 🍁🌺🌱🌿
Insights Into Water Vapor Uptake by Dry Soils Using a Global Eddy Covariance Observation Network

🔗 buff.ly/O9bovwm

Reposted by Joan Dudney

Hello everyone. Today in "One day, one paper", contrasting phenological responses among understorey herb species to warming, light, nitrogen, and land-use legacy reveal shifts in plant competition, with key implications for biodiversity and adaptive forest management 🍁🌎
Intra‐annual growth dynamics of forest understorey herbaceous plant species in response to global change
This study provides new insights into the growth dynamics of forest understorey species and their responses to global change drivers. The findings suggest that global changes, such as climate warming...
besjournals.onlinelibrary.wiley.com
Our new paper in Ecology Letters, led by Jan Divíšek, shows that non-invasive alien plant species that successfully establish within local plant communities tend to resemble the resident native species. In contrast, invasive alien species usually differ from native plants.
doi.org/10.1111/ele....
🌳 Our research in Nature Communications!
Converting coniferous to broad-leaved forests in Europe could cut summer hot extremes by up to 1 °C — boosting climate effectiveness.
Read more 👇
🔗https://www.nature.com/articles/s41467-025-64580-y
#ForestNavigator #ClimateScience #Forestry #NatureComms
Conversion from coniferous to broadleaved trees can make European forests more climate-effective - Nature Communications
This study investigates the effects of forestation on temperature in Europe using climate model experiments. The findings indicate that conversion from coniferous to broadleaved trees in currently for...
nature.com
Great to see the results of our massive biodiversity assessment at Berchtesgaden Natl. Park pour in! Cool insights on patterns & drivers of multidiversity!

#1 Macro- and microclimate interactively shape species diversity of multiple taxa in mountain landscapes by L. Geres. doi.org/10.1002/ecog...
Globalization has accelerated the spread of mosquito species that transmit human diseases. An analysis in Nature Communications shows that 45 disease-vector mosquito species have been introduced to non-native regions worldwide. go.nature.com/4hn6ogW 🧪
Mortality from fire & wind is increasing in Europe's forests, but what about biotic disturbances? A new, massive dataset compiled by @thlasny.bsky.social and many local experts shows a mixed picture: While wood borers increase strongly, defoliator activity generally decreases doi.org/10.1111/gcb....
Great new paper led by @knowlton.bsky.social with @ttkeller.bsky.social and @rupertseidl.bsky.social (and me!) Still so much to learn from #Yellowstone about #fire, #forests & #climatechange. #NSFfunded #JFSPfunded
🆕 in Ecosphere's "Vegetation Ecology" track: A hot & dry future may shake up Yellowstone forests—think fewer spruce, more fire-tolerant neighbors

📄Simulated postfire tree regeneration suggests reorganization of Greater Yellowstone forests during the 21st century
doi.org/10.1002/ecs2...