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Xi Yang| 杨曦

@xiyang.bsky.social

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

19 Posts361 Follower343 Folgt
Ben Bond-Lamberty@benbondlamberty.bsky.social · 8mo ago

"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...

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...

nature.com

Norbert Schwarz@nschwarz.bsky.social · 9mo ago

Next absurdity: Past or future collaboration with Chinese students and scientists would disqualify American researchers from access to funding. 🧪 #academicsky #psychscisky

Roland Hatzenpichler@environmicrobio.bsky.social · 9mo ago

“The prohibited activities would include joint research, co-authorship on papers, and advising a foreign graduate student or postdoctoral fellow. The language is retroactive, meaning any interactions during the previous 5 years could make a scientist ineligible for future federal funding.”

James Dinneen@jamesdinneen.bsky.social · 10mo ago

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.

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...

newscientist.com

Mathias Disney@matdisney.bsky.social · 10mo ago

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)

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.

nature.com

Steve Voelker@thetreecorener.bsky.social · 10mo ago

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.

Zach Urness@oregonoutdoors.bsky.social · 10mo ago

Drought and insects have killed an unprecedented number of Oregon’s Douglas fir trees during the last decade, costing billions in timber value, damaging infrastructure and ramping up wildfire danger. What is Douglas fir dieback? Where is it happening? What is being done? tinyurl.com/5n9amvx6

James Dinneen@jamesdinneen.bsky.social · 10mo ago

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...

AI reveals vast ‘ghost forests’ along U.S. coast

Machine learning method counts nearly 12 million dead trees, many likely killed by rising seas

science.org

Shawn Serbin@doctorjackpine.bsky.social · 10mo ago

www.commerce.senate.gov/2025/9/new-d...

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...

commerce.senate.gov

Lauren Rosenthal@laurenthal.bsky.social · 10mo ago

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...

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.

bloomberg.com

Global Change Biology@globalchangebio.bsky.social · 11mo ago

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 · 11mo ago

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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Belinda Medlyn@bmedlyn.bsky.social · 11mo ago

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...

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...

jobs.smartrecruiters.com

Mathias Disney@matdisney.bsky.social · 11mo ago

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....

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...

zslpublications.onlinelibrary.wiley.com

Catherine Rampell@crampell.bsky.social · 11mo ago

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.

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.

forbes.com

Abigail Swann, PhD@ecoclimatelab.bsky.social · 11mo ago

Reviewing this disinformation filled document was a colossal effort! See link in thread to sign up to receive the comment and press package.

Andrew Dessler@andrewdessler.com · 11mo ago

Our comment on the DOE CWG report is done. It tips the scales at 439 pages, approx. 3x longer than the DOE report. This is related to Brandolini's law: The amount of energy needed to refute bullshit is an order of magnitude bigger than that needed to produce it. Example: refuting one sentence.

DOE CWG STATEMENT (second paragraph of section 2.1.1, page 3): “Piao et al. (2020) noted that greening was even observable in the Arctic.” COMMENT: This statement implies that the Arctic greening signal was caused by elevated CO2 , however that is not the scientific consensus. Piao et al. (2020) attribute the greening trend in the Arctic predominantly to growing season length driven by warmer temperatures (see also Y. Zhang et al., 2022). Piao et al. (2020) also note that this positive impact of increasing temperatures appears to have weakened over the past four decades, “suggesting a possible saturation of future greening in response to warmer temperature” (see also comment on greenness trends related to Section 2.1.1, first sentence of Page 4). It is also important to put Arctic greening more broadly into the context of the carbon cycle and other impacts. While above-ground plants may have displayed more leaf area over the past decades, rising temperatures also thaw permafrost and drive accelerated decomposition in highly carbon rich soils (Turetsky et al., 2020), a process which is expected to accelerate as climate continues to warm (Miner et al., 2022). Thus even with Arctic greening, high latitude terrestrial systems may become net carbon sources to the atmosphere, causing an amplifying feedback (Braghiere et al., 2023). Other risks to the Arctic linked to higher CO2 levels and rising temperatures are not mentioned in this report (Virkkala et al., 2025). The Arctic is warming at a rate of 2 to 3 times the global average, leading to thawing of permanently frozen soils (permafrost), with downstream impacts including loss of structural support for buildings and subsidence, threatening communities, roads, runways, and other assets across Alaska (Manos et al., 2025; University of Alaska Fairbanks Institute of Northern Engineering US Army Corps of Engineers Alaska District & Laboratory, 2019).