Nick Marzolf

Mangroves, sawgrass, and hammock tree islands meet where salty and fresh waters converge in Everglades National Park. CREDIT: Cheryl Doughty

Wetlands can be carbon sinks or sources, depending on management strategies. A study of CO2 and methane fluxes in the Everglades highlights the role of freshwater flows in minimizing methane emissions and the power of mangroves to store carbon. In PNAS: https://ow.ly/tfIn50Yl7yN

Two and a half exciting updates to my hydroinformatics book (or: data science and hydrology?)

1. The materials all use the updated USGS dataRetrieval package now, yay!

Www.hydroinformaticsbook.com

More below

Manatees in the clear water of a springfed stream in Florida.

The University of Florida's School of Forest, Fisheries, and Geomatics Sciences is looking for a Forest Hydrologist. This is a 9-month, tenure-track, 70% Research / 30% Teaching appointment.

Why methane surged in the atmosphere during the early 2020s The atmospheric methane (CH4) growth rate surged after 2019, peaking at 16.2 parts per billion per year (ppb year−1) in 2020 before declining to 8.6 ppb year−1 in 2023. Using multiple atmospheric inve...

The Methane spike in the early 2020’s has been explained in two new studies. A combination of weakened atmospheric removal and increased emissions from warming wetlands, rivers, lakes, and agricultural land are to blame.
www.science.org/doi/10.1126/... 
www.science.org/doi/10.1126/...
#methane

Carbon Dynamics in Artificial Aquatic Ecosystems: Comparing Greenhouse Gases and DOM in Stormwater and Natural Ponds Stormwater ponds emit greenhouse gases at rates similar to carbon-rich natural ponds and greater than clear water natural ponds Stormwater ponds had unique humic-like organic materials but shared...

It’s important to know how artificial ecosystems process carbon compared to the natural ecosystems they replace or are built to mimic. Check out our fresh-out-the-oven @jgrbiogeo.bsky.social pub to see how GHG saturation & dissolved organic matter differ bw stormwater ponds & natural ponds in FL 💧🐊

Does discharge Q drive chemistry C in intermittent streams?

No. They depend more on dry-wet transitions

Highly variable CQ at low Q change to consistent CQ at high Q, signalling a switch from a biogeochemistry-driven dry to flow-driven wet state

agupubs.onlinelibrary.wiley.com/doi/10.1029/...

Putting greenhouse gas emissions numbers into context can be hard. The numbers are large, unfamiliar, and not intuitive.

That's why Project Drawdown and a team at the University of San Francisco collaborated to create a new web tool -- Carbon in Context.

www.carbonincontext.com

Check out our new study published with @thejonesctr.bsky.social Herpetology lab! We found 48 vertebrate species using uprooted longleaf pine trees for foraging, basking, and refuge, highlighting how storm microhabitats support biodiversity. See the study here -> lnkd.in/e8hdTxNQ

Are you working with #OpenData to advance #freshwater #biogeochemistry? Consider submitting an abstract to share your science in our special session at #2026SFS!

Organized by Ashif H Abir, Wil Wollheim, me, & Kelly Aho @kellyaho.bsky.social. Abstracts due 16 Jan 2026. www.sfsannualmeeting.org 💧🌎🧪

SL532/SS747: Water Quality Notes: What are concentrations and loads, and why do they matter? Water quality is a broad term used to describe a range of physical, chemical, and/or biological characteristics of water. Many different factors contribute to water quality. The decision of whether th...

There’s a lot of terminology out there when discussing water quality. This new UF/IFAS publication explains “concentrations” and “loads,” what they are, and why we should care: edis.ifas.ufl.edu/publication/...

dplyr but make it bussin fr fr no cap `genzplyr` is an alternative syntax for `dplyr` that replaces boring old function names with GenZ slang. Your data wrangling is about to hit different.

For anyone that needs a nerdy chuckle today:
hadley.github.io/genzplyr/

Check out our new paper, led by @abagaelpruitt.bsky.social, quantifying whole stream/river denitrification rates in an ag river and its tributary across seasons. Abagael did a great job leading this work and its a really great application of the open-channel N2 method! dx.doi.org/10.1029/2025...

Does anyone know of 13C data for invertebrates at NEON sites? Thank you!

Are you interested in an MS position in Stream Ecology?

My lab (www.benjamintumolo.com) is recruiting a Master's student to join us at Northern Michigan University.

🐛🧪🕸️🍂🌊

Please get in contact if you are interested, and pass on this ad to anyone you know that might be!

Apply by Dec 16

Hydroclimate and landscape diversity drive highly variable greenhouse gas emissions from tropical and subtropical inland waters - Nature Water This meta-analysis assesses the rates and drivers of greenhouse gas emissions from flowing and standing (sub)tropical inland waters, finding that emissions are lower than previous estimates. Considera...

Grateful to be part of this synthesis, led by Clément Duvert and Nick Marzolf. Nice to see this paper is finally out.
www.nature.com/articles/s44...

PhD at The Jones Center and @ugaecology.bsky.social with Drs. Alex Strauss and @gulothoughts.bsky.social! We are studying isolated wetland invertebrates and upland-wetland linkages. Please share and reach out with questions! Join us in the beautiful piney woods of SW GA
www.jonesctr.org/jobs/

All the things I was never trained to do I’m reminded just about every day that the disconnect between my education, and the career I built from it, is enormous. Or at least, it seems so. I had a pretty unremarkable educational sequence f…

New post: All The Things I Was Never Trained To Do. Which turns out to be a sneakily disguised meditation on what university education is for, and thus what university is, and what it isn't - despite the persistence of idiots who don't understand that!

Agriculture & Environmental Sustainability Funded Ph.D. and Master's positions at UGA.

Multiple funded Ph.D. and Master's positions in my lab. Topics broadly cover climate and agricultural adaptation, and energy & water governance (U.S. & Global South). Apply by Dec 1, 2025.

Details: www.sechindravallury.com/graduate-opp...

Please share with prospective students!

Assistant Professor of Environmental Water Systems Science The Department of Land Resources and Environmental Sciences at Montana State University Bozeman invites applications for a tenure-track position at the level of Assistant Professor with expertise in E...

💧Calling all hydrologists💧Montana State University is hiring an assistant professor of water systems science, broadly defined but with connections to groundwater/subsurface processes. Please spread the word! jobs.montana.edu/postings/48829

¡Acompáñanos en el próximo webinar de Con-Ciencia en las Américas!

Este mes aprenderemos sobre variabilidad y adaptación en ecosistemas de agua dulce.💦

📅 miércoles Oct 15 | ⏰ 12 PM ET

Para más info y acceder al Youtube Live: forms.gle/LDxcancxbMUL...

@ecologicalsociety.bsky.social #LatinxInSTEM

MS position for Fall 2026 available to study Hurricane Ecology w/ me at #UCF and with @jefferybcannon.bsky.social from @thejonesctr.bsky.social! Funded half time as a TA and half as an RA. See web for details: tinyurl.com/9pm33ttt
Please RT and share with your bright undergrads!!

Using automatic sensors in streams- Sharing some pics of our monitoring stations in Costa Rica. We're using sensors to monitor streams over time to understand how environments fluctuate and modify biotic community structure or ecosystem function.

NSF Graduate Research Fellowship Program (GRFP)

🧪The NSF has made changes to the GRFP solicitation and eligibility TODAY that may change your eligibility! PLEASE read through the solicitation if you were planning to apply and speak to your mentors about the merits of applying: www.nsf.gov/funding/oppo...

Where the Pigs and Buffalo Roam, the Wetlands They do Bemoan - Eos A novel fenced enclosure study demonstrates the heavy toll that invasive ungulates have on greenhouse gas emissions from coastal wetlands on Indigenous lands in Australia.

A novel fenced enclosure study demonstrates the heavy toll that invasive ungulates have on greenhouse gas emissions from coastal wetlands on Indigenous lands in #Australia.

🔗Read the Editor's Highlight in @eos.org: eos.org/editor-highl...

#GlobalGoalsWeek #AGUPubs #Wetlands #GreenhouseGases

Looking for a postdoc, and interested in river-coastal linkages, #remote sensing, and time series analysis? Come work with us @natureatcal.bsky.social on an exciting project led by @rachelspatial.bsky.social! CC @sfs-src.bsky.social @aslo.org @cerfscience.bsky.social ‪‪@caseagrant.bsky.social‬

UF just posted a call for applicants to our Ewel Postdoctoral Fellowship: postdoc.aa.ufl.edu/current-post.... The fellowship focuses on tropical/sub-tropical ecology and env. science. Great opportunity to join our ecological community at UF. I’d love to chat with folks that may be interested.

Angler Hatch Survey Take this survey powered by surveymonkey.com. Create your own surveys for free.

Do you fish in freshwater? Please share or/and complete survey gathering data on observations of insects for a study on aquatic insect population declines! The link to survey is here: www.surveymonkey.com/r/VXLMY89. Especially in need of information from #Canada, #SouthAmerica, #Africa & #Australia!

Floating chamber measurements

Researcher working with floating chambers

📣New paper📣
We measured #VOC & #CO2 fluxes from 3 ponds in a peatland forest using floating chambers. Understanding of freshwater ecosystems as VOC sources is poor, so this work led by Y. Qin, published in #ASLO_LO provides important new data.

doi.org/10.1002/lno....

@dg.dk @voltcenter.bsky.social

📢 #ArticleIRBio: Dr. Camille Minaudo (IRBio–UB) publish OLIGOTREND: a global database with 4.3M water quality & chlorophyll a records 🌍💧
🔗 doi.org/10.5194/essd...
Web IRBio: shorturl.at/YESFZ
#AquaticEcology #RecercaUB
🗺️ Map: 1894 sampling stations worldwide!

Nominate an Impactful Dataset You are invited to nominate a dataset to be included in a commentary about the impact of Earth, space, and environmental data using the dimensions of people, planet, and prosperity. Selected…

Know a dataset making an impact for people, planet, or prosperity?

🌎 Nominate it for AGU’s upcoming commentary by 10 Oct. You may be featured!

🔗: buff.ly/XLFfYqM
#ImpactfulData #EarthScience