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Posts by Tyson Wepprich

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‘It’s just madness’: Trump administration to close three-quarters of Forest Service research stations Between funding cuts, facility closures, and the inevitable resignations that will follow, there’s virtually no way for the Forest Service to continue to do research at its current level or quality, w...

My big takeaway from reporting this story is that it's not JUST about the Forest Service.

The closure of these stations threatens to upend a delicate system of mutually beneficial collaboration and resource sharing, and the impacts will ripple out far beyond the Forest Service itself.

1 week ago 222 156 3 10
Pipeline for integrating lidar data with structured demographic models for ecological inference. (a) Forest populations are surveyed at appropriate time intervals with a lidar scanner to produce high-resolution 3D point clouds. Point clouds are processed into canopy height models (CHMs) and digital terrain models (DTMs). (b) Individual tree segmentation is performed using a CHM-based algorithm (e.g. Dalponte & Coomes, 2016). (c) Relevant environmental variables are derived. For example, TWI is an indicator of soil moisture accumulation (Kopecký et al., 2021) and is calculated from the DTM. Local competition is inferred from the canopy density surrounding each tree, using the CHM. (d) Trees are matched across time points using a crown-matching algorithm (Battison et al., 2024; Olsoy et al., 2024), before measuring changes in size and classifying mortalities. (e) Continuous traits (e.g. height and crown area) are evaluated for their ability to predict survival and growth across the life cycle. (f) Selected traits and environmental parameters are used to model the vital rates using regressions. (g) The integral projection model (IPM) is constructed based on the selected vital rate models and key life history traits (e.g. mean life expectancy, longevity, generation time) are calculated. (h) Finally, IPM outputs are analysed to test ecological hypotheses.

Pipeline for integrating lidar data with structured demographic models for ecological inference. (a) Forest populations are surveyed at appropriate time intervals with a lidar scanner to produce high-resolution 3D point clouds. Point clouds are processed into canopy height models (CHMs) and digital terrain models (DTMs). (b) Individual tree segmentation is performed using a CHM-based algorithm (e.g. Dalponte & Coomes, 2016). (c) Relevant environmental variables are derived. For example, TWI is an indicator of soil moisture accumulation (Kopecký et al., 2021) and is calculated from the DTM. Local competition is inferred from the canopy density surrounding each tree, using the CHM. (d) Trees are matched across time points using a crown-matching algorithm (Battison et al., 2024; Olsoy et al., 2024), before measuring changes in size and classifying mortalities. (e) Continuous traits (e.g. height and crown area) are evaluated for their ability to predict survival and growth across the life cycle. (f) Selected traits and environmental parameters are used to model the vital rates using regressions. (g) The integral projection model (IPM) is constructed based on the selected vital rate models and key life history traits (e.g. mean life expectancy, longevity, generation time) are calculated. (h) Finally, IPM outputs are analysed to test ecological hypotheses.

The first paper from my PhD is now out in the world 🌲📖 Modelling forest dynamics using IPMs and repeat lidar doi.org/10.1002/rse2...

1 week ago 45 14 1 2
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Wolf Coordinator (Natural Resource Specialist 3) Initial Posting Date: 04/07/2026 Application Deadline: 04/21/2026 Agency: Department of Fish and Wildlife Salary Range: $5,458 - $8,352 Position Type: Employee Position Title: Wolf Coordinator (Natura...

Wolf coordinator job with ODFW in Salem, OR #altac #wildlife oregon.wd5.myworkdayjobs.com/en-US/SOR_Ex...

1 week ago 2 0 0 0
reverse-engineering a wine blend.

reverse-engineering a wine blend.

🍷 new preprint on reverse-engineering a wine blend! feedback wanted.

❓given a wine blend and samples of each pure-varietal wine that went into it, can we infer the unknown make-up of the blend based on chemical fingerprints?

(~ a tutorial on total least squares.)

🔗 chemrxiv.org/doi/full/10....

1 week ago 4 1 1 0

Yeah, but there are differently approaches. Often we'll predict a dominant tree for each pixel (20m) and then aggregate pixels for stand-level composition, which isn't quite the same. Here's an example: www.mdpi.com/2072-4292/13...

1 week ago 1 0 1 0

I want to use this to predict tree species composition from a pixel from remote sensing imagery

1 week ago 0 0 1 0

A bit more about monarchs and the border wall planned to run through the National Butterfly Center

1 week ago 35 18 0 0
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Characterizing Precariously Balanced Rocks (PBRs) in the Eastern United States for Estimating Maximum Past Earthquake Ground Motions #BSSA ⚒️

Scientists gently pushed precariously balanced rocks in the Blue Ridge and measured the motions with seismometers.

buff.ly/7oHMwaD

1 week ago 29 8 2 3
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Yeah, I have a work wife now

1 week ago 0 0 0 0
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Fair Contract Now for ProPublica Guild We, the workers of ProPublica, provide our readers with deeply researched, unbiased news that holds power to account. This work is more important now than ever, but our staff can’t properly contribute...

Good afternoon! All day today my colleagues and I will be on STRIKE. You can help us send a message! Please do not visit ProPublica's website and tell management to give us a fair contract so we can get back to work: actionnetwork.org/petitions/te...

1 week ago 14 8 1 0
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April-emerging Bombus queens id guide showing color patterns on bees for identification. Species included are Bombus impatiens, ternarius, bimac, perplexus, fervidus, vagans, affinis, fraternus, terricola

April-emerging Bombus queens id guide showing color patterns on bees for identification. Species included are Bombus impatiens, ternarius, bimac, perplexus, fervidus, vagans, affinis, fraternus, terricola

May emerging Bombus Queens from "Bees of Eastern North America" showing id patterns for Bombus griseocolis, rufocinctus, auricomus, borealis, pensylvanicus, sandersoni, and frigidus

May emerging Bombus Queens from "Bees of Eastern North America" showing id patterns for Bombus griseocolis, rufocinctus, auricomus, borealis, pensylvanicus, sandersoni, and frigidus

Are you also gearing up for Bombus queen season? The ladies are already flying around Chicagoland, so I collaged together the queen IDs from Colla, Richardson, & Williams for quick reference.

See the full pdf here on @xercessociety.bsky.social :
www.xerces.org/sites/defaul...

2 weeks ago 30 14 0 2

I wrote today about a big study on replication--and why it's so hard to know if a study will hold up or not. Gift link: nyti.ms/4sNu3MF

2 weeks ago 79 29 2 7
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Introducing the @heatmap.news and @mit.edu Electricity Hub, our new zip code-level look at what exactly you’re paying for on your electricity bill and how it stacks up against … anyone or everyone else: electricity.heatmap.news

2 weeks ago 77 33 9 8

ask the BLM how that went in 2020 when Trump 1.0 moved HQ to Grand Junction, CO

spoiler: 87% of HQ staff chose to leave the agency rather than move

3 weeks ago 42 13 3 3

New paper led by @jameslamping.bsky.social mapping #old-growth forests in SE #Alaska and SW B.C.
Take home messages:

3 weeks ago 9 2 1 1
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Addressing Gaps in Butterfly Population Monitoring to Catalyze Global Insect Conservation The conservation community sorely lacks a global indicator of change in insect populations. Given widespread insect declines, addressing this gap is key for conservation and policy targets. We sugges...

We’re missing a global indicator to track insects. By analyzing thousands of butterfly populations, we highlight both promising signals and key challenges—showing why these taxa are strong candidates for building a Global Index to support conservation. conbio.onlinelibrary.wiley.com/doi/10.1111/...

4 weeks ago 24 17 0 1

Worked well, but remember, I am a professional who pootered 10000s of beetles during a postdoc

4 weeks ago 4 0 0 0
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Entomological Classics – The Pooter or Insect Aspirator I’m sure that we can all remember our first encounter with that wonderful entomological device, The Pooter and were probably all told to remember to  “suck don’t blow” and also to remember to suck …

*the true pooter design from Dr. Poos is the 2-tube design, single tube like this was invented earlier. Thanks to Simon Leather for the history simonleather.wordpress.com/2014/06/26/e...

4 weeks ago 1 0 0 0
Tube connected to tapered plastic vial next to box showing parent sucking snot from a baby nose

Tube connected to tapered plastic vial next to box showing parent sucking snot from a baby nose

I got a pooter* for baby snot #entomology

4 weeks ago 2 0 1 1

Providence's partner is still denying every basic health insurance claim. This has been so bad.

1 month ago 0 1 0 0
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This is the updated, more streamlined petition link. Please use this one instead: actionnetwork.org/letters/tell...

1 month ago 17 12 1 0
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Evaluating the Effectiveness of a Multispecies Matching Algorithm Applied to a Novel Species, Risso's Dolphins (Grampus griseus) Automated matching algorithms are an increasingly valuable tool in marine mammal research. A multispecies matching algorithm, originally described in Patton et al. analyzes distinctive morphological ...

New paper alert! Alexandra Vanderzee found that AnyDorsal can effectively identify Risso's dolphins. This is a fun result because a) AnyDorsal wasn't trained on Risso's and b) it shows AnyDorsal can balance scars dorsal notches as separate ID information

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

1 month ago 6 4 2 0
march to admin building at PSU

march to admin building at PSU

another march photo

another march photo

shot of SEIU 503-089 members from behind standing in front of rally speaker at admin building

shot of SEIU 503-089 members from behind standing in front of rally speaker at admin building

We joined SEIU 503-089 in unity for a good contact for PSU Higher Ed workers! JWJ supports the members who make PSU work! 💜✊🏽

1 month ago 7 3 0 0
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The assignment was both simple and daunting: write about the past, present and future of timber in Oregon.

We traveled from pioneer days —> boom times —> rise of environmentalism —> rise of wildfires —> Trump admin plans to boost logging —> mass timber revolution? tinyurl.com/ykxwhdun

1 month ago 10 3 0 1
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Three Decades of Butterfly–Plant Interaction Turnover Explained by Climate and Species Loss Long-term biodiversity loss reshapes interaction dynamics inpollination networks. Communities become increasingly dominated bygeneralist species that are more capable of rewiring interactions thanspe...

New study on temporal interaction turnover using a unique dataset 🦋🪷

Communities adapt to climate fluctuations through rewiring. But over the long term, as species are lost, rewiring declines—reducing the capacity of communities to buffer environmental change
onlinelibrary.wiley.com/doi/epdf/10....

1 month ago 22 8 1 1
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Global Biodiversity Framework Targets Can Drive Action on Insect Declines, but Lack Robust Indicators to Prove Their Effectiveness Insects are the most diverse and functionally important animals on Earth. In at least some regions, terrestrial populations are declining. Despite this, insects are often overlooked in conservation p...

New #OA paper from the @glitrs.bsky.social project asking, how well does the Global #Biodiversity Framework address insect declines? Turns out the targets could well deliver for insects, but the indicators won't tell us whether or not they have! doi.org/10.1111/con4...

1 month ago 11 4 0 0
A graphic reads “92% of participating ProPublica Guild members voted YES to authorize our bargaining committee to call for a strike.” The “92%” is very large. A ProPublica Guild logo is under the text.

A graphic reads “92% of participating ProPublica Guild members voted YES to authorize our bargaining committee to call for a strike.” The “92%” is very large. A ProPublica Guild logo is under the text.

1/ Today, we overwhelmingly voted to authorize a STRIKE as we fight for a fair contract with @propublica.org.

1 month ago 923 366 17 54
Graphical abstract for the article

Graphical abstract for the article

Happy to share my very first article dragonflies !
We investigate how dragonflies traits are linked with their vulnerability in Europe. Our main conclusions: habitat, life cycle length and temperature preferences are the main traits linked with vulnerability.
authors.elsevier.com/a/1mnPQ1R%7E...

1 month ago 12 5 1 1
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Butterflies crossing oceans, moths navigating by the stars: unravelling the mysteries of insect migrations Trillions of insects embark, largely unnoticed, on epic journeys every year across mountain ranges, deserts and seas, and it is only now, as their numbers suffer huge declines, that scientists are tra...

Nice summary of long distance insect migration in the Guardian today with fancy graphics www.theguardian.com/environment/...

1 month ago 71 31 1 1
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PRISM solar irradiance time series data are now available. Great news for many fields of inquiry. www.prism.oregonstate.edu/notices/noti...

1 month ago 1 1 1 0
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