Landscape Biogeochemistry at the University of Connecticut

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Dr. Ashley Helton, Principle Investigator

Ashley is an Associate Professor in the Department of Natural Resources and the Environment & the Center for Environmental Sciences and Engineering at the University of Connecticut. Ashley earned her BS from the University of Cincinnati, and both her MS and PhD in Ecology from the University of Georgia's Odum School of Ecology.  Ashley is interested in hydrology, biogeochemistry, and how water and elemental cycles are linked across broad spatial scales.

Follow Ashley on Twitter @AquaBGC
Click here for Google Scholar and here for CV. 

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Eric Moore, PhD Candidate

Eric's PhD research focuses on river network-scale patterns of groundwater discharge of legacy nitrogen to streams.  He is part of the NSF-funded Legacy Nitrogen project. 

​Eric received his BS in Geology from Indiana University and most recently was a Research Associate for Duke University's River Center, where he worked as part of the StreamPULSE project. You can read more about Eric's research on his website.

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Madeline Kollegger, PhD Student

Madeline's PhD research focuses on salt marsh restoration and biogeochemistry. Madeline is part of an EPA-funded project on coastal wetland restoration along the Connecticut coast.

Madeline received her BS from the University of Connecticut and her MS from Montclair State University where her research focused on how changes in sea level influence coastal deltaic systems. You can read more about Madeline's research on her website.  



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Nicolette Nelson, Research Technician

Nicolette mainly works on the EPA-funded project on coastal wetland restoration along the Connecticut coast (jointly with the Helton and Lawrence labs). She also assists with graduate student projects and data management and analysis.
 
Nicolette received her BS in Wildlife from Humboldt State University and her MS in Biology from Washington State University Vancouver, where her research was funded by an NSF Graduate Research Fellowship and focused on American bullfrog invasion in California

Congratulations to recent graduates!

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Danielle Hare, PhD (2023)

Danielle's PhD research focused on how carbon cycling in streams responds to climate change, specifically increasing temperatures and how groundwater inputs influence stream temperature dynamics. You can read more about her research on her website. Before her PhD, she received her BS in Geology from Syracuse University and her MS in Geosciences from University of Massachusetts-Amherst. Danielle is currently a postdoc at the Cary Institute of Ecosystem Studies.  

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Ariana Dionisio, MS (2023)

Ariana's thesis focused on how watershed land use legacies influence water quality. Before her MS, Ariana received her BS in Environmental Science from Western Washington University and worked as an analytical chemist for several years.  She recently joined King County Department of Natural Resources in Washington State to continue working on water quality issues.    

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Alaina Bisson, MS (2022)

Alaina's MS thesis focused on greenhouse gas dynamics at the surface-ground water interface along stream corridors.  Before her MS, Alaina received her BS in Natural Resources from University of Connecticut.  She is currently with the Taylor Lab (Ecosystem Ecology/Biogeochemistry) at Harvard University as a Research Associate.

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Fiona Liu, BS (2022)

Fiona graduated as a McNair Scholar and University Scholar, with a thesis focused on nitrous oxide dynamics in groundwater discharging to streams and rivers.  Fiona was an undergraduate research assistant on many projects, and majored in Ecology. She joined Li Li's research group at Penn State as a PhD student.

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​Marissa Naclerio, BS (2022)
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​Marissa worked with our group as an Honors student majoring in Natural Resources and the Environment with a concentration in Conservation and Sustainability. Her thesis focused on the impact of hurricanes on mangrove forests in the Florida Everglades. After graduation Marissa was a Yale Conservation Scholar as part of the Early Leadership Experience.


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Caitlin Daddona, BS (2022)

​Caitlin worked as a research technician across several projects with our group and majored in Environmental Sciences and Sociology. After graduation she accepted a position with the Connecticut Department of Energy and Environmental Protection. 


Lab Alumni (Not Pictured)

Postdocs
  • Dr. Mark Harvey (2019-2020); Current position - Director at Harvey Geoscience
  • Dr. Lauren Koenig (2017-2021); Current position - Data Scientist at USGS
Graduate Students
  • Dr. Janet Barclay (PhD, 2019); Current position - Hydrologist at USGS New England Water Science Center
  • Adam Haynes (MS, 2021); Current position - PhD student in Margaret Zimmer's lab at UC Santa Cruz
  • ​Kevin Jackson (MS, 2020); Current position - Research Associate in Xin Zhang's lab at University of Maryland
  • Sean Ooi (MS, 2019); Current position - PhD student in Wendy Yang's lab at University of Illinois
  • April Doroski (MS, 2017); Current position - Water Resources and Climate Resilience Specialist at Fuss & O'Neill, Inc.
  • Jason Sauer (MS, 2016); Current position - Postdoctoral Fellow, National Science Foundation
Undergraduates
  • Noah Ligouri-Bills (2023)
  • Kenneth Bell (2020)
  • Huayile Zhang (2020)
  • Katherine Bell (2019)
  • Kayleigh Granville (2019)
  • Kelsey Witik (2018)
  • ​Madelin Stagnito (2017)
  • D. Cristina Macklem (2016)
  • Mary Zawatski (2016)
  • Eva Nelson (2015)
  • Mary Schoell (2015)
  • Emily McInerney (2014)
  • Hannah Tripp (2014)
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