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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Danielle Hare, PhD Candidate

Danielle's PhD research focuses on how carbon cycling in stream ecosystems responds to climate change, specifically increasing stream water temperatures. Danielle will develop reach-and network-scale models as part of the CREWS project. 

Danielle received her BS in Geology from Syracuse University and her MS in Geosciences from University of Massachusetts-Amherst, where she studied groundwater-surface water interactions in wetlands. You can read more about her research on her website. 
 

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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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Ariana Dionisio, MS Student

Ariana's research focuses on how watershed land use legacies influence water quality. She is part of our EPA-funded project on watershed legacies in the Long Island Sound watershed.

Ariana received her BS in Environmental Science from Western Washington University.  Ariana worked as an analytical chemist for several years before joining our research group. 

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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

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Noah Liguori-Bills, BS Student

Noah works as a research assistant on our NSF-funded legacy nitrogen project.  Noah's independent research project will focus on groundwater delivery of road salts to river corridors.  

Noah is an Honor's student majoring in Chemistry and minoring in Computer Science. 

Congratulations to our 2022 graduates!

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Alaina Bisson, MS Student

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 joining the Taylor Lab (Ecosystem Ecology/Biogeochemistry) at Harvard University as a Research Associate.

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Fiona Liu, BS student

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 student
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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 student

​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


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 - PhD student in Nancy Grimm's lab at Arizona State University
Undergraduates
  • 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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