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Jessica Mark Welch

@jmarkwelch.bsky.social
562 followers 1K following 49 posts

Microbial ecologist at the Forsyth Institute, adjunct at the Marine Biological Laboratory. Favorite hobby: taking pictures of goo.

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Reposted by Jessica Mark Welch
Dmitri Petrov @petrovadmitri.bsky.social · 17/09/2026
We are searching for an Assistant Professor in Evolutionary Biology! Looking for colleagues asking fundamental questions relating to evolutionary processes and drivers of evolutionary patterns. If you think it is you, please do apply! And please repost. facultypositions.stanford.edu/jobs/assista...
facultypositions.stanford.edu
Assistant Professor in Evolutionary Biology - Stanford University, California, United States
The Department of Biology at Stanford University seeks applicants for a tenure-track Assistant Professor in Evolutionary Biology. A successful candidate will conduct research that asks fundamental que...
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Will Ratcliff @wcratcliff.bsky.social · 15/09/2026
1/17 Submissions are now open for the 2027 Microbial Population Biology GRC! We expect this meeting to be extraordinarily oversubscribed. If you want to come, time is of the essence--apply ASAP! June 27–July 2 • Andover, NH www.grc.org/microbial-po...
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Kim Lane Scheppele @kimlanelaw.bsky.social · 09/08/2026
As always, Sherrilyn Ifill is the conscience of our times -- and her warnings are urgent. Listen. And act.
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Bahtiyar Yilmaz @bahtiyil.bsky.social · 03/08/2026
A stool transplant delivers billions of microbes into a sick gut. Almost none move in for good. We followed donor-recipient pairs from whole communities down to single nucleotides, and found the gut runs a ruthless strain-level filter. Out now in Cell Reports 🧵 www.cell.com/cell-reports...
cell.com
Strain-level ecological filtering governs microbial colonization of the human gut
Baertschi et al. demonstrate that microbiota transplantation functions as a selective ecological filter. Although donor species frequently appear, only specific lineages achieve stable strain integrat...
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Miaoxiao Wang (Roy) @miaoxiaor.bsky.social · 27/07/2026
Happy to share our latest review on @isme-microbes.bsky.social. We discussed how (intra- or interpopulation) cell-cell distances shape microbial interactions and enable community-level outcomes. Several hypotheses are proposed and we are testing them! doi.org/10.1093/isme...
doi.org
Influence of cell-cell distance on the ecology and evolution of microbial communities
Abstract. Microorganisms assemble into spatially structured communities in which neighboring cells are separated by highly heterogeneous cell-cell distance
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Reposted by Jessica Mark Welch
Cameron Thrash @jcamthrash.bsky.social · 27/07/2026
metaSMASH: Scalable Biosynthetic Gene Cluster Detection for Large Metagenomic Assemblies www.biorxiv.org/content/10.6... #jcampubs
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Marine Biological Laboratory @mblscience.bsky.social · 14/07/2026
Join us on July 17 to hear Rachel Meyers lecture on "RNAi Across Scales: From Model Organisms to Clinical Therapies." Open to the public for in-person and virtual attendance. No registration required for in-person attendance. 🔗 More info here: go.mbl.edu/fel
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A. Murat Eren (Meren) @merenbey.bsky.social · 04/07/2026
New study by Alexander Henoch (@ahenoch.bsky.social), a PhD student in our group @hifmb.de and @awi.de, shows what it takes to bring gene synteny into microbial pangenomes, and what we learn about the variability landscape of genomes when we do that. See the pre-print here: doi.org/10.64898/202...
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Gretchen Goldman, PhD @gretchentg.bsky.social · 02/07/2026
On July 14, join me and @ucs.org for a critical conversation on the new book, "On Courage: How to be a Dissident in an Age of Fear", with authors, @juliaangwin.com and @fieldsmeyer.com for the second national call of our Science Rising Initiative. RSVP to join us: act.ucsusa.org/Courage
Graphic to promote the national call with speaker photos and event details that are also available at act.ucsusa.org/Courage
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Patrick Siegman @siegman.biz · 01/07/2026
Parked but not idle: The buses “will charge up their nearly 200-kilowatt-hour batteries overnight, when the power supply is at its cleanest & cheapest, then send energy back to the grid from 4 pm to 7 pm on days when the grid is strained. The district will earn revenue for the power it shares…”
canarymedia.com
In Massachusetts, parked EVs will start feeding the grid this summer
Three electric school buses will kick-start the state’s groundbreaking vehicle-to-grid pilot program once school's out, with more EVs to be added in the…
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Ákos T Kovács @evolvedbiofilm.bsky.social · 01/07/2026
Bacteriophage-mediated cell lysis externalizes a metabolically valuable nutrient to broadly modulate bacterial communities -in #ISMEJournal academic.oup.com/ismej/advanc...
academic.oup.com
Bacteriophage-mediated cell lysis externalizes a metabolically valuable nutrient to broadly modulate bacterial communities
Abstract. Cobamides, including vitamin B12, are essential cofactors exchanged between organisms across diverse ecosystems including oceans, soils, and the
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Jon Corsiglia (he/him/el) | Eco-Economy Insider @ecoeconomyinsider.com · 18/06/2026
HUGE PROGRESS! Keep up the volume, speak up, speak out! I put together a one-stop action page. Call, text, sign, takes five minutes. Link 👇. Do it today.
Screenshot of a Threads post by Senator Jeff Merkley (@senjeffmerkley), posted two hours ago. The post announces that he and Senator Lisa Murkowski led a bipartisan effort to “Save Ocean Sensors” and that the U.S. Senate unanimously passed legislation to protect the Ocean Observatories Initiative. The text explains that the ocean sensors are critical for managing fisheries, forecasting weather, and understanding climate change. The post shows approximately 2,300 likes, 58 comments, 256 reposts, and 9 shares.
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Ran Blekhman @blekhman.bsky.social · 16/06/2026
Nine (not so simple) steps: a practical guide to using machine learning in microbial ecology Step 1: Determine whether machine learning is necessary or even worth doing journals.asm.org/doi/10.1128/...
journals.asm.org
Nine (not so simple) steps: a practical guide to using machine learning in microbial ecology | mBio
Microbial ecologists are increasingly turning to machine learning (ML) models to better identify and predict meaningful biological patterns and relationships in molecular microbial community data (inc...
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Stephanie King @stephstephking.bsky.social · 16/06/2026
Welcome to the resistance, algae
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27 UNIHTED @27unihted.bsky.social · 09/06/2026
One year ago today, 300+ NIH scientists and staff risked their livelihoods by signing the Bethesda Declaration to call out government leadership for harms to science and patients... ...today, their new report documents continuing harm to science and the American public. www.27unihted.org/bd-home
Picture of crowd outside nih with text 

One year ago today, 300+ NIH scientists and staff risked their livelihoods by signing the Bethesda Declaration to call out government leadership for harms to science and patients...

...today, their new report documents continuing harm to science and the American public.
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Davide Ciccarese @davideciccarese.bsky.social · 08/06/2026
Just for fun, I built a small spatially explicit model to explore a cubic cross-section of cells growing in a biofilm, based on the three main interaction types (from a 10 yr. old review). Have a look, feedback is very welcome! github.com/davideciccar...
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Gina Lewin @ginalewin.bsky.social · 09/06/2026
Happy to share this perspective about better integrating the microbiome and symbiosis fields, starting with a call to be more accurate with our terminology journals.asm.org/doi/10.1128/... Was the best experience to write this article with the amazing @khadlily.bsky.social #microbiome #microsky
journals.asm.org
mGem: Tapping into the language of symbiosis to advance human microbiome research | mBio
An overarching goal in microbiome research is to understand how the complex communities in our bodies contribute to health and disease, and ultimately, we aim to leverage and control these communities to promote health. To continue advancing this work, we need conceptual frameworks that aid in understanding the relationships between us and our microbiota. Conceptual frameworks can ensure that we avoid doing our science in silos by unifying work across disciplines, and they can help form hypotheses and questions for future research. In human microbiome research, there have been various conceptual frameworks that have advanced our science (1–4). In this perspective, we highlight the symbiosis framework and definitions in connection to microbiome research, with the hope that adoption of this framework will advance our ability to study the human microbiome.
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Sarah McAnulty, Ph.D. @sarahmackattack.bsky.social · 04/06/2026
Another night of doodling at Teen Art club
A lightning bug cold, just Philadelphia style, soft pretzel, and a water ice and smoking a cigarette wearing flies and says yo lightning bugs were here so cool it with the pes
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Jeremy Berg @jeremymberg.bsky.social · 29/05/2026
For a clear description of what is in the new OMB grant-making regulations, see elizabethginexi.substack.com/p/summary-of... 1/2
elizabethginexi.substack.com
Summary of Key Changes in OMB’s Proposed Federal Financial Assistance Rule
Russell Vought is going to destroy American Science
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John Jackson @sealpoet.bsky.social · 28/05/2026
Ms. E. Jean Carroll, I should mention, Targeted by Trump's "Justice" henchmen. The harder Trump tries To prove that she lies The more she deserves our attention.
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John Jackson @sealpoet.bsky.social · 17/05/2026
School kids, that's such a chill age. Well worth the chaos and spillage. Hear girls and boys Making joyful noise. It takes a child to raise a village.
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Codfather #FBPE 🇫🇷🇪🇺 @codfather.bsky.social · 14/05/2026
France is mandating solar panels on every large commercial car park in the country — turning millions of square metres of idle asphalt into one of Europe's most productive clean energy assets. I have been mentioning this for months - they are shooting up on all the supermarket car parks.
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April Glick Pulito @aprilglick.bsky.social · 14/05/2026
I feel I should alert Bluesky to the baby foxes in our yard
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Ákos T Kovács @evolvedbiofilm.bsky.social · 11/05/2026
See a brief review summarizing the use of synthetic microbial communities (SynComs) for revealing the ecology of specialized metabolites [my holiday break writing exercise] portlandpress.com/essaysbioche... #MicrobiomeEcology at Institute of Biology Leiden (IBL)
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Alex Zucker @alexzucker.bsky.social · 10/05/2026
Went through old emails + discovered I first gave to #FreeBlackMamas in 2017, which means this is my 10th anniversary of giving the gift of liberation, thanks to @nationalbailout.bsky.social💝 It's not too late to start your own #MothersDay tradition of breaking open cages! bit.ly/freeblackmamas2026
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Ada Palmer @adapalmer.bsky.social · 05/05/2026
Sightings of humpback whale “super-groups” skyrocke. Sightings of large aggregations have jumped from 10 to 65 per year in just five years, driven by recovering populations and abundant prey. BBC buff.ly/ITvScVC #ShareGoodNewsToo
buff.ly
'It's so chaotic': Humpback whales are forming super-groups
On a misty morning in December, two photographers captured the images of 304 individual humpbacks – the highest number of large whales ever identified in a single day.
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Olúfẹ́mi O. Táíwò @olufemiotaiwo.bsky.social · 03/05/2026
this is the precise sense in which "technology is political"
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Graham Cummins @grahamiancummins.bsky.social · 03/05/2026
Imagine what things would be like if the cheapest most accessible energy was renewable and we could make biodegradable plastic. Not look around and see how close you got. Those are true, and this is what things are like. We've got a megalomaniac problem not a tech problem.
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Tami Lieberman @contaminatedsci.bsky.social · 01/05/2026
It's official-- my promotion to Associate Professor with Tenure has been approved by the Executive Committee of the MIT Corporation!! This is a surreal moment and I owe my deepest gratitude to the members of my lab, collaborators, mentors, and colleagues who made this possible. Thank you!
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Mark Peifer (He, him) @peiferlabunc.bsky.social · 27/04/2026
On a not too good day in our world, two awesome wildflowers from out woods. Chamaelirium luteum (Devil's Bit), one of many plants with a naughty name, and most exciting--Itea virginica (Virginia Sweetspire), rare in our region and yet it suddenly appeared in a big clump along Big Branch
Itea virginica Virginia Sweetspire
Chamaelirium luteum (Devil's Bit)
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John Jackson @sealpoet.bsky.social · 26/04/2026
Live in the present, you know it won't last, For the future is coming up fast! But something's amiss As you're reading this: I wrote these words in the past
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George Takei @georgetakei.bsky.social · 25/04/2026
Pope Leo turned the question around like the boss he is.
Screenshot of a tweet by perrito barista (@Carlitospindola), translated from Spanish, quoting Pope Leo responding to a question about migration by reframing it: "What is the global North doing to help the global South in its situation that forces them to migrate?" The embedded video shows the Pope holding a microphone aboard what appears to be a plane, with clergy visible behind him.
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public health guy @publichealthguy1.bsky.social · 25/04/2026
this account is run by a human at NASA JPL who only posts real images with their receipts. it only has 11k followers compared to the 200k the ai slop space account has
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Le Cagle @lecagle.bsky.social · 24/04/2026
There are a lot of great Onion headlines, but as an environmental rhetorician, this has to be my #1.
theonion.com
Report: Every Place On Earth Has Wrong Amount Of Water
RESTON, VA—A new global report released Monday by the U.S. Geological Survey revealed that every place on earth currently has the wrong amount of water. “New satellite data confirms that every corner ...
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Jillian Petersen @jillianmpetersen.bsky.social · 24/04/2026
A hat-trick of papers from the lab, I'm so proud and excited to announce! We have clams, we have sulfur-oxidizing symbionts, we have seagrasses, and we explore how they're all linked @cemess.bsky.social @microbesplanet.bsky.social
Underwater view through seagrass blades
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John Jackson @sealpoet.bsky.social · 23/04/2026
Deception and distractions in layers Paid for by we, the taxpayers. Our government he’s suing, You can see what he’s doing: Giving huge welfare checks to his heirs
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Helen Kennedy @helenkennedy.com · 22/04/2026
Priceless post from the official White House social media
Margo Martin
@MargoMartin47
X.com
Congratulations, Georgia Women's Tennis!

The photo shows Trump and five white dudes in red ties standing in front of and completely blocking 10 young women
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Simon Hammann @simonhammann.bsky.social · 20/04/2026
Don't be shy to take on a little two-week side project. These five months will be the most precious three years of your academic journey.
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lyndsay @magpie.tips · 21/04/2026
They're just little guys. You can look at them for free and you can look at them up close if you pay for Bird Premium (binoculars or camera). They're just doing behaviors. They will never email you.
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Pujuan Poppy Deng @poppy-pujuan-deng.bsky.social · 16/04/2026
I am so excited to share our new findings with you! We provide the structural evidence for a direct protein-to-DNA information pathway, showing how a bacterial enzyme 'reads' its own structure to 'write' DNA. www.science.org/doi/10.1126/...
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John Jackson @sealpoet.bsky.social · 17/04/2026
Pete Hegseth, a man of conviction, Threatens war crimes with no restriction. White Nationalist tribal, He quotes from the Bible Chapter and verse from the book of Pulp Fiction
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Peter Head @peterheadcbe.bsky.social · 15/04/2026
With 150GW solar, India achieved its target of having 50% of its total installed electricity capacity from non-fossil fuel sources in June 2025, reaching this milestone 5 years ahead of its original 2030 deadline set under the Paris Agreement www.pv-magazine.com/2026/04/10/i...
pv-magazine.com
India hits 150 GW solar milestone
The country added around 44.6 GW of new PV capacity in fiscal year 2026, according to new figures released by JMK Research.
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Dr Emma Salisbury @salisbot.bsky.social · 14/04/2026
If you're wondering how the blockade is landing, this has been making its way around the naval nerds today
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Katie Mack @astrokatie.com · 04/04/2026
I highly recommend putting this NASA #Artemis II mission livestream on and just leaving it playing as you go about your weekend. Live views of the spacecraft, occasional visualizations of the current config, views of the control room, space-ground radio audio. www.youtube.com/live/m3kR2KK...
youtube.com
NASA's Artemis II Live Mission Coverage (Official Broadcast)
YouTube video by NASA
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Bruce Arthur @brucearthur.bsky.social · 01/04/2026
NASA is honestly one of the greatest things humans have ever created, the stuff of math and dreams
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CosmoQuest @cosmoquest.org · 02/04/2026
There are now 10 toilets in Space International Space Station: 4 Crew Dragon Docked at ISS: 1 Soyuz Docked at ISS: 1 Tiangong Space Station: 2 Shenzhou Docked at TSS: 1 Artemis II on way around Moon: 1 This will be the first time a toilet has left low earth orbit!
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Carl Quintanilla @carlquintanilla.bsky.social · 27/03/2026
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