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Xi Yang| 杨曦

@xiyang.bsky.social
362 followers 343 following 19 posts

Associate Professor at the University of Virginia. Interested in trees and remote sensing. Pl of Plant Ecology and Remote Sensing lab: uva.theopenscholar.com/plant-ecolog…

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Reposted by Xi Yang| 杨曦
Brian J. Enquist @bjenquist.bsky.social · 28/09/2026
Please pass along: I’m recruiting PhD students to join our Macroecology Lab. We study physical ecology, macroecology, and biodiversity — spanning scaling, trait-based ecology, theory, comparative biology & ecoinformatics. Several avenues for funding. Please reach out if interested 🧪🌐🌾
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Xi Yang| 杨曦 @xiyang.bsky.social · 31/01/2026
Check out WaPo’s coverage of our work published last December!
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Xi Yang| 杨曦 @xiyang.bsky.social · 14/12/2025
A sad day for Brunonians
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Reposted by Xi Yang| 杨曦
Ben Bond-Lamberty @benbondlamberty.bsky.social · 03/12/2025
"Overlooked and extensive ghost forest formation across the US Atlantic coast" -- wow what a comprehensive analysis by Yeung, @xiyang.bsky.social et al. 🎉 www.nature.com/articles/s41...
nature.com
Overlooked and extensive ghost forest formation across the US Atlantic coast - Nature Sustainability
Large swathes of standing dead trees or ‘ghost forests’ can form owing to rising sea levels in coastal areas, but the extent to which this occurs is unclear. This study maps ghost forests at the indiv...
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Norbert Schwarz @nschwarz.bsky.social · 14/11/2025
Next absurdity: Past or future collaboration with Chinese students and scientists would disqualify American researchers from access to funding. 🧪 #academicsky #psychscisky
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Emily Bernhardt @drbiogc.bsky.social · 20/10/2025
What a pleasure to have a great science reporter willing to explore the swamps with us!! Great pre-read for a soon-to-be-out paper from #HenryYeung of the @xiyang.bsky.social lab
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John Holbein @johnholbein1.bsky.social · 17/10/2025
BREAKING: UVA rejects the Trump Administration's Compact.
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Fernando T. Maestre @ftmaestre.bsky.social · 08/10/2025
In #drylands, plants don’t grow randomly — they self-organize into disordered hyperuniform patterns that help them use water wisely & endure extreme aridity. A beautiful hidden logic of nature, revealed in a new @pnas.org study doi.org/10.1073/pnas... including #Maestrelab alumni
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James Dinneen @jamesdinneen.bsky.social · 07/10/2025
Over the past two years, the land carbon sink appears to have weakened dramatically, driving the largest one year jump in atmospheric CO2 on record in 2024. Is this the end of the land carbon sink? I asked around for @newscientist.com.
newscientist.com
One of Earth’s most vital carbon sinks is faltering. Can we save it?
For decades, forest, grasslands and other land ecosystems have collectively absorbed up to a third of the carbon dioxide we emit each year - but this climate buffer may be collapsing far sooner than a...
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UVA Environmental Science Department @uvaenvisci.bsky.social · 06/10/2025
AI reveals vast 'ghost forests' along U.S. coast, work by Environmental Sciences PhD student, Henry Yeung. www.science.org/content/arti...
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Mathias Disney @matdisney.bsky.social · 06/10/2025
Our new perspective on what TLS can (& can't) do in forest research www.nature.com/articles/s41... - led by Eduardo Maeda w lots of great colleagues including @kimcalders.bsky.social @emilyrlines.bsky.social @louiseterryn.bsky.social @benjaminbrede.bsky.social (apols for any I don;t have @ for)
nature.com
Expanding forest research with terrestrial LiDAR technology - Nature Communications
This Review highlights how terrestrial laser scanning is transforming forest research by enabling highly detailed 3D measurements of trees, supporting applications in forest ecology, carbon monitoring, and biodiversity assessment.
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Steve Voelker @thetreecorener.bsky.social · 06/10/2025
Good reporting on widespread Douglas-fir mortality in SW Oregon. I lived on the edge of the Ashland watershed mentioned in the article ca. 2012-2014. Even then I was seeing patchy mortality from crowding/drought that I knew would get much worse as temps warmed.
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James Dinneen @jamesdinneen.bsky.social · 01/10/2025
I joined a team of ecologists wading through the muck of the Carolina coast in search of "ghost forests" killed by rising seas for @science.org. We were guided by a a new map that reveals millions of dead trees standing along the East Coast, marking an overlooked consequence of climate change...
science.org
AI reveals vast ‘ghost forests’ along U.S. coast
Machine learning method counts nearly 12 million dead trees, many likely killed by rising seas
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Reposted by Xi Yang| 杨曦
James Dinneen @jamesdinneen.bsky.social · 01/10/2025
Based on this research by Henry Yeung et al. www.researchsquare.com/article/rs-6...
researchsquare.com
Overlooked and extensive ghost forest formation across the US Atlantic coast
Rising sea levels have driven widespread coastal tree die-off, forming large swaths of ghost forests. While reports of coastal forest loss are accumulating, its true severity and factors determining t...
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Reposted by Xi Yang| 杨曦
James Dinneen @jamesdinneen.bsky.social · 01/10/2025
Some ghosts captured on camera:
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Xi Yang| 杨曦 @xiyang.bsky.social · 01/10/2025
Thanks to @jamesdinneen.bsky.social for writing this article published in @science.org today!
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Shawn Serbin @doctorjackpine.bsky.social · 30/09/2025
www.commerce.senate.gov/2025/9/new-d...
commerce.senate.gov
New Democratic Staff Report: Direct Evidence Trump Administration Has Been Illegally Imposing President’s Proposed Budget Cuts at NASA Since Early Summer—Threatening Safety, Mission, Science
Today, U.S. Senator Maria Cantwell (D-Wash.), Ranking Member of the Senate Committee on Commerce, Science and Transportation, released a new staff report revealing that OMB Director Russell Vought has...
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Reposted by Xi Yang| 杨曦
Lauren Rosenthal @laurenthal.bsky.social · 29/09/2025
Electricity now costs 267% more (!!) for 1 month vs. what it cost 5 years ago near data center hotspots. Awesome reporting from Josh Saul @dinabass.bsky.social Leonardo Nicoletti @naurtorious.bsky.social Demetrios Pogkas (gift link) www.bloomberg.com/graphics/202...
bloomberg.com
AI Data Centers Are Sending Power Bills Soaring
Wholesale electricity costs as much as 267% more than it did five years ago in areas near data centers. That’s being passed on to customers.
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Global Change Biology @globalchangebio.bsky.social · 18/09/2025
We mourn the passing of our Editor-in-Chief Steve Long. His vision to establish one of the first journals dedicated to Global Change over 30 years ago was truly ahead of its time. Through GCB, researchers have demonstrated that biology and ecosystems are not simply victims of global change..
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Jim Randerson @jimranderson.bsky.social · 10/09/2025
I'm happy to share a paper in Science Advances that makes the case for a weak land carbon sink, drawing upon JPL and Chloris biomass time series. To close the budget with a net land sink of 0.8 Pg C/y from 2000-2019, we propose increases in the ocean sink and decreases in fossil fuel emissions.
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Xi Yang| 杨曦 @xiyang.bsky.social · 12/09/2025
Amazing dataset!!! I can imagine a lot of new findings in the coming years as a result of this effort. Kudos to the team!
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Reposted by Xi Yang| 杨曦
Belinda Medlyn @bmedlyn.bsky.social · 09/09/2025
Postdoctoral position in Forest Monitoring available. Know your way around spatial datasets? Join us to help monitor changes in Australia's precious forest estate! @westsyduhie.bsky.social jobs.smartrecruiters.com/WesternSydne...
jobs.smartrecruiters.com
Postdoctoral Research Fellow in Forest Monitoring
Company Description: Western Sydney University is a modern, forward-thinking, research-led institution at the heart of Australia’s fastest-growing and most economically significant region. With 11 cam...
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Elisabeth Bik @elisabethbik.bsky.social · 05/09/2025
Relevant to the #PRC10 audience.
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UVA Environmental Science Department @uvaenvisci.bsky.social · 04/09/2025
Katrina Bennett, Hydrologist, Los Alamos National Laboratory Hosted By: Howie Epstein & Xi Yang “Improved subgrid distribution of snow-shrub-permafrost interactions in the Arctic” Thursday, September 4th, 2025 3:30 PM-4:30PM, Clark 108
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Bill Smith @wkolby.bsky.social · 02/09/2025
Happy to share a new lab @jgrbiogeo.bsky.social paper: "Drought Response in Three Conifer Species Detected by Sap Flow and Proximal Thermal Remote Sensing" led by the amazing Daphna Uni w/ @mostafaj.bsky.social others @uarizona.bsky.social agupubs.onlinelibrary.wiley.com/doi/10.1029/...
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Mathias Disney @matdisney.bsky.social · 03/09/2025
I like big trees and I cannot lie. Great bit of work by @kimcalders.bsky.social @louiseterryn.bsky.social and colleagues using innovative climbing and scanning approach. Stunning illustration of tree structural and biodiversity complexity zslpublications.onlinelibrary.wiley.com/doi/full/10....
zslpublications.onlinelibrary.wiley.com
Integrating terrestrial and canopy laser scanning for comprehensive analysis of large old trees: Implications for single tree and biodiversity research
Canopy laser scanning (CLS) enhances 3D measurements of large trees by lifting laser scanners into the canopy. Combining CLS with terrestrial laser scanning improves point cloud precision, reduces oc...
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Rupert Seidl @rupertseidl.bsky.social · 02/09/2025
Good news for a change: Background mortality in unmanaged forests of Europe has not increased over past decades. Great work from the European Forest Reserve Initiative EuFoRIa, out in @journalofecology.bsky.social doi.org/10.1111/1365...
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Reposted by Xi Yang| 杨曦
Catherine Rampell @crampell.bsky.social · 29/08/2025
Trump admin planning to change student visas from lasting for duration of academic program to fixed 4-yr term, and then much harder to renew Could destroy US ability to attract global talent, particularly those seeking advanced degrees in STEM. The median time to complete a PhD is 5.7 yrs per NSF.
forbes.com
Trump Deals A New Immigration Blow To International Students
Trump officials have proposed a new rule limiting international students to fixed periods of entry, making a U.S. education more precarious.
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The Royal Society @royalsociety.org · 28/08/2025
Professor Susanne von Caemmerer FRS and Professor Graham Douglas Farquhar FRS are jointly awarded the Royal Medal (Biological) 2025 for refining the ways we monitor and model photosynthesis in leaves from molecular to global scales. #RSMedals royalsociety.org/medals-and-prizes/…
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Abigail Swann, PhD @ecoclimatelab.bsky.social · 28/08/2025
Reviewing this disinformation filled document was a colossal effort! See link in thread to sign up to receive the comment and press package.
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Kristina Anderson-Teixeira @k-andersonteixeira.bsky.social · 25/08/2025
**Fellowship opportunity (graduate/postdoc)** - The Smithsonian Institution Fellowship Program is accepting applications through October 15. Postdoc fellowships have always received a 2nd year match from the host unit. Come join us! fellowships.si.edu/opportunity/...
fellowships.si.edu
Smithsonian Institution Fellowship Program (SIFP)
node:field_teaser]
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Reposted by Xi Yang| 杨曦
Karolina Heyduk @kheyduk.bsky.social · 19/08/2025
Our "Joshua tree is CAM" paper is finally out: nph.onlinelibrary.wiley.com/doi/10.1111/... Data collection started back in 2021, when we saw weird results in some RNAseq that made me stop and wonder if Joshua trees, long thought to be C3, were actually...CAM!
nph.onlinelibrary.wiley.com
Cryptic CAM photosynthesis in Joshua tree (Yucca brevifolia, Y. jaegeriana)
Joshua trees are long-lived perennial monocots native to the Mojave Desert in North America. Composed of two species, Yucca brevifolia and Y. jaegeriana (Asparagaceae), Joshua trees are imperiled by...
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LEMONTREE @lemontree-uofr.bsky.social · 15/08/2025
📢Just out! A new paper by the team in @pnas.org : Observed declines in leaf nitrogen explained by photosynthetic acclimation to CO2! www.pnas.org/doi/10.1073/... Maoya Bassiouni, @nickgregsmith.bsky.social @trevorkeenan.bsky.social et al.
pnas.org
Observed declines in leaf nitrogen explained by photosynthetic acclimation to CO2 | PNAS
Widespread evidence of decreasing leaf nutrients has raised concerns about ecosystem productivity under global change. Interpreting trends in leaf ...
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Reposted by Xi Yang| 杨曦
Vanessa Warheit @vwarheit.bsky.social · 15/08/2025
That phony EPA 'climate report'? The good folks at @carbonbrief.org fact-checked it. Take a look, and then file a comment with the EPA. interactive.carbonbrief.org/doe-factchec...
interactive.carbonbrief.org
Factcheck: Trump’s climate report includes more than 100 false or misleading claims
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Reposted by Xi Yang| 杨曦
Virginia Gewin @virginiagewin.bsky.social · 07/08/2025
Around the world, the student visa landscape is undergoing a tectonic shift. My latest for @nature.com looks at the impacts on early career researchers—& country economies. One PhD student from China now plans to leave the US: “I want to work somewhere where I feel seen, valued and appreciated”
nature.com
How researcher visa curbs threaten science careers
Anti-immigration sentiment is fuelling a drive to slash international student and worker numbers, but at what cost to researchers and countries leading the charge?
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Markus Eichhorn @markuseichhorn.bsky.social · 06/08/2025
Terrestrial laser scanning can transform national forest inventories by adding new measurements and a 3D perspective. In our new paper we provide a pathway for implementing 3D forest surveys. 1/6 🧪🌎🌳🌲 www.sciencedirect.com/science/arti...
Fig. 1 from Holvoet et al. (2025). TLS and MLS scan setup, point cloud segmentation, and pre-processing.
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Jingfeng Xiao @jingfengxiao.bsky.social · 03/08/2025
A new study in Nature Climate Change shows contrasting biological production trends over land and ocean. Led by Yulong Zhang at Duke. I am glad to be part of the team. The last study that looked at production over both land and ocean was published in 1998. www.nature.com/articles/s41...
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Ngoc Nguyen @ngocnb.bsky.social · 31/07/2025
Check out our recent publication from Nature Geoscience and my first paper ever! Our results represent the first global assessment of the impact and drivers of rain-induced carbon pulses since their first official documentation in the 1950s as the Birch effect.
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Eos @eos.org · 30/07/2025
Liftoff! The NASA-ISRO Synthetic Aperture Radar mission has launched from Satish Dhawan Space Centre. #NISAR will scan the entire globe twice every 12 days to measure changes in Earth’s ecosystems, cryosphere, and land surface. “It’s orbiting magic.” —Alex Gardner, NASAJPL eos.org/articles/tra...
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Ben Bond-Lamberty @benbondlamberty.bsky.social · 23/07/2025
Hey #ESA25 — please note our session OOS 28 - Advancing Ecological Understanding Through Ecosystem Manipulations: Past, Present, and Future events.rdmobile.com/Sessions/Det... — it's an awesome speaker list! please RT
events.rdmobile.com
OOS 28 - Advancing Ecological Understanding Through Ecosystem Manipulations: Past, Present, and Future - Details
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Bruce Macintosh @bmacastro.bsky.social · 18/07/2025
Senate CJS bill is passed out of committee, with strong support for NASA and NSF (basically flat budgets) and strongly supportive language for many facilities. www.appropriations.senate.gov/imo/media/do...
appropriations.senate.gov
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Weiwei Zhan @weiweizhan.bsky.social · 11/07/2025
Interested in how plant intrinsic water-use efficiency (iWUE) responds to rising CO2? Our new paper shows that CO2-enhanced iWUE is mainly driven by reduced canopy conductance, while stimulation of ecosystem photosynthesis is less detectable given current data length. www.nature.com/articles/s41...
nature.com
Reduced water loss rather than increased photosynthesis controls CO2-enhanced water-use efficiency - Nature Ecology & Evolution
A machine learning approach using long-term observations of eddy covariance finds that the increase in plant intrinsic water-use efficiency under higher CO2 levels, across diverse ecosystems, is drive...
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AAUP @aaup.org · 01/07/2025
We join with our VA AAUP Conference & UVa Faculty Senate in condemning the DOJ threats to withhold federal research funding in order to oust UVa President Jim Ryan for not bowing to political interference. We join with them in demanding an independent & public investigation into Ryan's forced exit.
On behalf of the Virginia Conference of the American Association of University Professors
(VA-AAUP), I write today to strongly condemn the federal Department of Justice (DOJ for their politically motivated campaign that has just forced UVa President James Ryan to resign.
VA-AAUP also calls for an investigation on what role, if any, members of UVa's Board of Visitors may have played in assisting the Department of Justice's vendetta against President Ryan.
The actions of the DOJ are clear violations of the independence and integrity of the University of Virginia as a free and open institution of research and learning. Even worse, this campaign represents nothing less than an extra-legal bid to impose federal control and President Trump's political ideology on American higher education itself.
Much like a free press, the health of American democracy depends upon the independence and integrity of its public and private universities. After all, the university is the place where scientific knowledge about the world is produced, circulated, and shared, and in order to produce valid and actionable knowledge, faculty and students must be free to follow the data where it leads without fear or favor. As scholars, in short, we must be free to pursue the truth, regardless of the opinions or ideologies of politicians, religious leaders, or other powerful social interests. This pursuit of truth becomes deeply corrupted when external actors or government officials try to impose their ideologies and values on the university or when they use their power and authority to bring campus leaders to heel.
Yet this is exactly what happened at the University of Virginia last week. The Trump administration has reportedly been unhappy with James Ryan's support for the bedrock values of academic freedom, shared governance, diversity, and equal access. According to press reports, Justice Department officials particularly disliked Ryan's focus on encouraging community service and felt that he had…racism, sexism, and homophobia went unchallenged and the benefits of higher education were limited to a privileged few.
To accomplish this goal, the Trump administration elected to use the full power of the U.S. government to force President Ryan's resignation. And what was their leverage? Despite the fact that the investigation of UVa was incomplete, the DOJ nonetheless threatened to withhold hundreds of millions of dollars in federal grant funding, including grants that fund UVa's life-saving medical and cancer research. It worked. Fearing what would happen to the university and the citizens of Virginia without this research funding, Ryan chose to resign. In sum, this was an illegitimate process with an appalling outcome.
VA-AAUP also would like to remind UVa's Board of Visitors that one of their most important duties is to protect the University and its leaders from external political interference. By no means should they support this interference or, even worse, execute the politically motivated orders of federal bureaucrats. Yet, according to the New York Times, it appears that, rather than serving the needs of students or the people of the Commonwealth, some members of the Board may have acted as if they were ground troops in a political chain of command that stretched from the Trump White House to Governor Youngkin and then to the Governor's appointees on UVa's Board.
Indeed, we have witnessed this political chain of command at work across multiple public universities in the Commonwealth, as many Youngkin-appointed Boards of Visitors have abandoned their responsibility to be wise stewards of their campuses in favor of executing the political orders of the Governor and Attorney General. Over the past year, we have seen unprecedented levels of Board overreach in the form of attempts to control curriculum, rewrite anti-discrimination policies, repress campus political speech, and to expand their power over the faculty tenure process. And now we must ask: did UVa…colleges and universities. In short, in Virginia's democratic system, a series of checks and balances exist to ensure that the Commonwealth's public universities enjoy independence from the political whims and machinations of local, state, and federal officials.
It is clear, however, that President Trump, Governor Youngkin, and many of Youngkin's board appointees want to bulldoze these checks and balances in order to exert ideological control over the Commonwealth's public colleges and universities.
We refuse to let them do so. We stand with the UVa Faculty Senate in condemning the actions of the U.S. Department of Justice, and we join with them in demanding an independent and public investigation into the circumstances and negotiations that led to Ryan's forced resignation.
On behalf of our members and all faculty across the Commonwealth, the Virginia Conference of the AAUP therefore strongly condemns the Trump administration's attack on the independence and integrity of the University of Virginia. We strongly condemn the Justice Department's decision to hold federal research funding hostage in order to oust UVa's president for political and ideological reasons. We reject the Justice Department's specious claims that President Ryan's administration was not in compliance with federal civil rights law. And we call on President Trump, the Justice Department, and Governor Youngkin to change course, to respect the independence and integrity of the University of Virginia, and to cease their larger effort to exert control over the governance and curriculum of American colleges and universities, both public and private.
We also call upon the Rector of UVa's Board and the Rectors of George Mason University and the Virginia Military Institute to follow the rule of law and refuse to seat any board member who was rejected by the Senate Privileges and Elections Committee. As Virginia Senator Surovell has made clear, these appointments have been rejected following the rules of t…
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Nature @nature.com · 02/07/2025
International students enrich university communities and strengthen civic life. We must defend their place in global education, says Maia Chankseliani go.nature.com/3G8L2pI
go.nature.com
What we stand to lose when foreign students are seen as a threat
International students enrich university communities and strengthen civic life. We must defend their place in global education.
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Copernicus ECMWF @copernicusecmwf.bsky.social · 01/07/2025
The Copernicus Sentinel-4 mission launches today! Europe’s first geostationary satellite instrument for air quality will deliver hourly, high-resolution observations, significantly benefitting our #CopernicusAtmosphere Monitoring Service. Learn more: atmosphere.copernicus.eu/cams-looking...
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Dr. Jessie Christiansen @aussiastronomer.bsky.social · 29/06/2025
NASA is being told to cancel 19 *active* missions to save $6B, which looks to be less than the ICE *hiring/retention* budget going forward. I need people to let that sentence sink into their bones for a minute.
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Shawn Serbin @doctorjackpine.bsky.social · 28/06/2025
#SaveNASA #SaveNASAscience
A flyer explaining all of the devastating cuts to the NASA budget that jeopardize the core functions of the Agency and its global technological and scientific leadership An imaging explaining where to learn more about the impacts of the proposed budget cuts to NASA
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Mathias Disney @matdisney.bsky.social · 28/06/2025
Our new perspective on the use (& misuse) of what we're calling virtual forests (rather than digital twins!), for forest change from space, led by @kimcalders.bsky.social w many great colleagues 🔭 🧪🔬 www.sciencedirect.com/science/arti...
sciencedirect.com
Realistic virtual forests for understanding forest disturbances and recovery from space
Forests worldwide are undergoing large-scale and unprecedented changes in terms of structure and composition due to land use change and natural distur…
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Blue Virginia @bluevirginia.bsky.social · 27/06/2025
“The Trump Administration’s shameful and extreme political attacks against the University of Virginia undermine the rule of law, centuries of tradition, and all that UVA contributes to our Commonwealth." - @jonesjay bluevirginia.us/2025/06/uva-...
Press release from Jay Jones on the Trump administration's "Outrageous Attacks on University of Virginia"
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biometlab @biometlab.bsky.social · 27/06/2025
Dear Friends of Fluxes, join @ameriflux.bsky.social this year in Tucson, AZ for the AmeriFlux Annual Meeting! The meeting will happen from Oct 22-24. Virtual attendance for plenary sessions will be free. Submit abstracts by July 25
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