Cody Sheik
@microbesheik.bsky.social
I’m a geomicrobiologist with a geologically short attention span. AquaticGeomicro.com
New manuscript from the lab! Interesting story developing, we didn’t find any Aphanizomenon nitrogenase genes despite being the primary bloom former! Instead, Dolichospermum takes charge of fixing nitrogen during the bloom.
www.sciencedirect.com/science/arti...
www.sciencedirect.com/science/arti...
Rare cyanobacteria drive nitrogen-fixation and cyanotoxin production in an Aphanizomenon-dominated bloom
Late summer, recurring cyanobacterial blooms in Lake of the Woods (LOW) are polycyanobacterial and typically dominated by Aphanizomenon flos-aquae. LO…
www.sciencedirect.com
September 20, 2025 at 12:13 PM
New manuscript from the lab! Interesting story developing, we didn’t find any Aphanizomenon nitrogenase genes despite being the primary bloom former! Instead, Dolichospermum takes charge of fixing nitrogen during the bloom.
www.sciencedirect.com/science/arti...
www.sciencedirect.com/science/arti...
Reposted by Cody Sheik
Oh check it out, @microbesheik.bsky.social found some cool microbes in "mysterious goo" from a ship's rudder shaft...and I got to talk about it 😂
www.cnn.com/2025/08/01/s...
www.cnn.com/2025/08/01/s...
Scientists happened upon black goo on a ship — and discovered it was teeming with life | CNN
A Great Lakes research vessel had goo leaking from its rudder shaft. Scientists later found it contained previously undiscovered microorganisms.
www.cnn.com
August 1, 2025 at 3:09 PM
Oh check it out, @microbesheik.bsky.social found some cool microbes in "mysterious goo" from a ship's rudder shaft...and I got to talk about it 😂
www.cnn.com/2025/08/01/s...
www.cnn.com/2025/08/01/s...
Nice to be out on the water taking samples! Fun teaching students over looked things like backing up a trailer and how to drive a boat! Also rinse those bottles! @mnseagrant.bsky.social
June 24, 2025 at 3:44 PM
Nice to be out on the water taking samples! Fun teaching students over looked things like backing up a trailer and how to drive a boat! Also rinse those bottles! @mnseagrant.bsky.social
Reposted by Cody Sheik
Researchers say the findings will help lead to better monitoring of blooms.
www.greatlakesnow.org/2025/06/rese...
www.greatlakesnow.org/2025/06/rese...
Research pinpoints type of blue-green algae that may produce toxins in Lake Superior estuary | Great Lakes Now
Researchers say the findings will help lead to better monitoring of blooms.
www.greatlakesnow.org
June 20, 2025 at 6:25 PM
Researchers say the findings will help lead to better monitoring of blooms.
www.greatlakesnow.org/2025/06/rese...
www.greatlakesnow.org/2025/06/rese...
Reposted by Cody Sheik
If you want to keep your gear safe, DO NOT PUT IT IN THE LAKE. One of our buoys was just hit by a vessel (which will remain nameless here).
June 13, 2025 at 9:44 PM
If you want to keep your gear safe, DO NOT PUT IT IN THE LAKE. One of our buoys was just hit by a vessel (which will remain nameless here).
Reposted by Cody Sheik
PhD student researcher Abby Smason, supported by #Minnesota Sea Grant, presented this week at #IAGLR25 on preliminary findings of a breakthrough discovery that identifies the bacteria behind toxins in the St. Louis River estuary. 🧪
📢 Get the full story: z.umn.edu/mnsg_25cyano...
#GreatLakes
📢 Get the full story: z.umn.edu/mnsg_25cyano...
#GreatLakes
June 6, 2025 at 5:00 PM
PhD student researcher Abby Smason, supported by #Minnesota Sea Grant, presented this week at #IAGLR25 on preliminary findings of a breakthrough discovery that identifies the bacteria behind toxins in the St. Louis River estuary. 🧪
📢 Get the full story: z.umn.edu/mnsg_25cyano...
#GreatLakes
📢 Get the full story: z.umn.edu/mnsg_25cyano...
#GreatLakes
Great work from my graduate student Amanda on the cycling of organic sulfur in subsurface ecosystems! Turns out microbes are poised to use org S and we haven’t been paying attention! www.nature.com/articles/s41...
The potential for coupled organic and inorganic sulfur cycles across the terrestrial deep subsurface biosphere - Nature Communications
Organic sulfur compounds are vital to life but often overlooked in the sulfur cycle, especially in the subsurface. Subsurface microbes can metabolize diverse organosulfur compounds, hinting at a more ...
www.nature.com
April 23, 2025 at 7:48 PM
Great work from my graduate student Amanda on the cycling of organic sulfur in subsurface ecosystems! Turns out microbes are poised to use org S and we haven’t been paying attention! www.nature.com/articles/s41...
Has anyone experienced any metagenome assembly issues with the Aviti reads? Metaspades assemblies are awful compared to megahit but even the megahit assemblies aren’t great.
March 11, 2025 at 4:27 PM
Has anyone experienced any metagenome assembly issues with the Aviti reads? Metaspades assemblies are awful compared to megahit but even the megahit assemblies aren’t great.
MAG binning question: do you ignore smaller orphan bins that are likely parts of larger bins, or do you incorporate? If so what are you using?
February 25, 2025 at 9:49 PM
MAG binning question: do you ignore smaller orphan bins that are likely parts of larger bins, or do you incorporate? If so what are you using?
Reposted by Cody Sheik
It has been amazing to continue this long-term research through a PhD with @quendi.bsky.social and a postdoc with @archaeal.bsky.social . Not everyone gets to see a project through like this as an ECR- thanks to supportive PI's and the NSF-PRFB fellowship that let me design my own postdoc 💙🧪
After 24 years of work, I’m thrilled to announce the TYMEFLIES dataset, which comprises metagenomes from Lake Mendota (Madison, WI), collected roughly every 10 days (471 samples) for 20 years! @quendi.bsky.social @robinrohwer.bsky.social
rdcu.be/d5put
A thread…
rdcu.be/d5put
A thread…
Two decades of bacterial ecology and evolution in a freshwater lake
Nature Microbiology - A 471-metagenome time series from Lake Mendota in Wisconsin, USA, reveals seasonal and decadal shifts in bacterial functional and ecological dynamics, especially in response...
rdcu.be
January 3, 2025 at 6:29 PM
It has been amazing to continue this long-term research through a PhD with @quendi.bsky.social and a postdoc with @archaeal.bsky.social . Not everyone gets to see a project through like this as an ECR- thanks to supportive PI's and the NSF-PRFB fellowship that let me design my own postdoc 💙🧪
This paper was over 10 years in the making!! I remember the many zoom and in person discussions! Congrats to all the people that have been a part of this work over the years, especially Rick and Mitch, and a HUGE thanks to @emilruff.bsky.social for his tenacity and bringing this to fruition!!
Deep life is astonishing and diverse, and we have so much more to learn!
So happy that this study is out. Big thanks to co-first author @bellahda.bsky.social and all the collaborators!
www.science.org/doi/10.1126/...
@science.org @mblscience.bsky.social @simonsfoundation.org #deeplife #microbiome
So happy that this study is out. Big thanks to co-first author @bellahda.bsky.social and all the collaborators!
www.science.org/doi/10.1126/...
@science.org @mblscience.bsky.social @simonsfoundation.org #deeplife #microbiome
A global comparison of surface and subsurface microbiomes reveals large-scale biodiversity gradients, and a marine-terrestrial divide
The microbiomes of Earth’s surface and subsurface environments are different in composition, but similar in diversity.
www.science.org
December 19, 2024 at 1:15 AM
This paper was over 10 years in the making!! I remember the many zoom and in person discussions! Congrats to all the people that have been a part of this work over the years, especially Rick and Mitch, and a HUGE thanks to @emilruff.bsky.social for his tenacity and bringing this to fruition!!
Don’t forget abstracts are due Monday! Looking forward to some great microbial chats!
Looking for a session at IAGLR ‘25 to submit your micro focused abstract?? Consider session 17 Microbiology of Earth’s Great Lakes!
December 13, 2024 at 3:30 PM
Don’t forget abstracts are due Monday! Looking forward to some great microbial chats!
Reposted by Cody Sheik
The palaeoclimate potential of continental scientific drilling www.nature.com/articles/s41... #jcampubs
The palaeoclimate potential of continental scientific drilling - Nature Geoscience
Nature Geoscience - The palaeoclimate potential of continental scientific drilling
www.nature.com
December 9, 2024 at 5:38 PM
The palaeoclimate potential of continental scientific drilling www.nature.com/articles/s41... #jcampubs
Looking for a session at IAGLR ‘25 to submit your micro focused abstract?? Consider session 17 Microbiology of Earth’s Great Lakes!
December 9, 2024 at 7:29 PM
Looking for a session at IAGLR ‘25 to submit your micro focused abstract?? Consider session 17 Microbiology of Earth’s Great Lakes!
Neat paper from my former postdoc on the seasonal turnover of Dolichospermum strains in the nearshore of Lake Superior!
www.sciencedirect.com/science/arti...
www.sciencedirect.com/science/arti...
Spatiotemporal dynamics of cyanobacterium Dolichospermum lemmermannii populations in a bloom-prone region of Lake Superior
Cyanobacterial Harmful Algal Blooms (cHABs) are increasingly common in marine and freshwater environments, including the Laurentian Great Lakes (LGL).…
www.sciencedirect.com
October 17, 2024 at 5:29 PM
Neat paper from my former postdoc on the seasonal turnover of Dolichospermum strains in the nearshore of Lake Superior!
www.sciencedirect.com/science/arti...
www.sciencedirect.com/science/arti...
Excited to see this paper by Chris Schuler on microbe-mineral biofilms at Soudan Underground Mine! Great team of Early Career students driving some great science!
www.sciencedirect.com/science/arti...
www.sciencedirect.com/science/arti...
April 18, 2024 at 2:19 PM
Excited to see this paper by Chris Schuler on microbe-mineral biofilms at Soudan Underground Mine! Great team of Early Career students driving some great science!
www.sciencedirect.com/science/arti...
www.sciencedirect.com/science/arti...
Glad to see this out and in review! Postdoc Andrew Wood looked at seasonal strain turnover of Dolichospermum in Lake Superior. biorxiv.org/cgi/content/...
But not just Doli that has strain turnover!
But not just Doli that has strain turnover!
March 1, 2024 at 2:12 PM
Glad to see this out and in review! Postdoc Andrew Wood looked at seasonal strain turnover of Dolichospermum in Lake Superior. biorxiv.org/cgi/content/...
But not just Doli that has strain turnover!
But not just Doli that has strain turnover!
Reposted by Cody Sheik
Spatio-temporal dynamics of cyanobacterium Dolichospermum lemmermannii populations in a bloom-prone region of Lake Superior www.biorxiv.org/content/10.1... #jcampubs
March 1, 2024 at 2:07 PM
Spatio-temporal dynamics of cyanobacterium Dolichospermum lemmermannii populations in a bloom-prone region of Lake Superior www.biorxiv.org/content/10.1... #jcampubs
Interested in Organic sulfur? Check out our new manuscript on how organic sulfur influences sediment biochemistry! aslopubs.onlinelibrary.wiley.com/doi/10.1002/...
November 10, 2023 at 2:46 PM
Interested in Organic sulfur? Check out our new manuscript on how organic sulfur influences sediment biochemistry! aslopubs.onlinelibrary.wiley.com/doi/10.1002/...
@drewsteen.bsky.social in Duluth giving a great Friday seminar!
November 3, 2023 at 8:12 PM
@drewsteen.bsky.social in Duluth giving a great Friday seminar!
Apply to be our next Director of The Large Lakes Observatory!
tinyurl.com/mmxe93dt
scse.d.umn.edu/large-lakes-...
tinyurl.com/mmxe93dt
scse.d.umn.edu/large-lakes-...
tinyurl.com
November 1, 2023 at 2:14 PM
Apply to be our next Director of The Large Lakes Observatory!
tinyurl.com/mmxe93dt
scse.d.umn.edu/large-lakes-...
tinyurl.com/mmxe93dt
scse.d.umn.edu/large-lakes-...
Some days are better than others being a prof. Today was a good day! #LakeSuperior
September 20, 2023 at 8:29 PM
Some days are better than others being a prof. Today was a good day! #LakeSuperior