The Lab D’Andrilli researches carbon cycling from the perspective of dissolved organic matter (DOM) evolution and biogeochemistry in marine, freshwater, terrestrial, and cryosphere ecosystems by investigating its quality and quantity. Aquatic, terrestrial, and icy environments can store and produce microscopic carbon-based materials (DOM). Humans are contributing to climate warming at a rate that will dramatically alter or reduce these reservoirs within a lifetime. In a warming climate, the release of glacial DOM into surrounding soils, rivers, and oceans is expected to increase greenhouse gases. In the Laboratorio D’Andrilli, we research the amount and type of carbon-based materials (or chemical energy) that are currently stored in glaciers and produced in rivers, soils, and marine waters, so we can predict its impact in the future. At the bulk and molecular-level, DOM composition and character reflect biogeochemical flux and cycling; therefore, identifying its chemical signatures may inform understanding of spatial and temporal patterns throughout aquatic and terrestrial networks. As humans, we can all can use this information to help reduce our carbon footprints and enforce healthy environmental policy in the future as the climate warms and sea-levels rise.
Juliana D'Andrilli, Ph.D.
Louisiana Universities Marine Consortium (LUMCON)
Chauvin, Louisiana 70344
Phone: (985) 851-2876
The Lab D'Andrilli
Listen to my interview on dissolved organic matter research for the Society for Freshwater Science (SFS) Making Waves Podcast!
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Aired on February 6, 2018
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Carbon cycling within and connected through cryosphere, aquatic, and terrestrial ecosystems
Dissolved organic carbon (DOC) production, use, storage, and transformation
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How have human beings impacted these waters?
We are identifying spatiotemporal patterns of fluorescent DOM in the West Fork of the Gallatin River, coupling gross primary production, ecosystem respiration, and DOM characterization as the system moves from peak to base flow conditions with increasing land-use development.
Led by Robert A. Payn (Montana State University)
and Juliana D'Andrilli (LUMCON)
What DOM compounds fluoresce in natural and engineered ecosystems?
We are identifying the chemical compounds that can be detected with Excitation Emission Matrix Fluorescence Spectroscopy using direct measurement techniques in order to unify fluorescent community language that will minimize confusion and misinterpretations. Researchers, both young and old, let’s keep the conversation going and learn more from DOM photophysical properties that we can measure by EEMs.
Led by Fernando Rosario-Ortiz (University of Colorado, Boulder) and Juliana D'Andrilli (LUMCON)
Environmental Science & Technology 2022: PDF
Environmental Science & Technology 2020: PDF
Are we getting the same answer?
This is a mass spectrometry (MS) DOM research project with 16 participating laboratories worldwide working towards an optimized protocol for best practices in the molecular assessment of dissolved organic matter using high resolution MS techniques (Fourier transform ion cyclotron resonance and Orbitrap MS instruments).
Led by: Jeffrey Hawkes (Uppsala University, Sweden)
and Juliana D'Andrilli (LUMCON)
Limnology & Oceanography Methods: Open Access PDF
What effects does legacy mining have on river ecosystems and how will the EPA's superfunded Upper Clark Fork River project change ecosystem regimes over the next 20 years?
We are a large team of 5 researchers seeking to identify the metabolic ecosystem regime changes with ongoing river restoration efforts. The team's multidisciplinary efforts are focused on metal concentrations, water quality (inorganic and organic carbon), DOM quality and metal complexation, hydrology, and biological dynamics from microbes to aquatic organisms, such as insects and fish.
Led by: Maury Valett (University of Montana), Mike DeGrandpre (University of Montana), Juliana D'Andrilli (LUMCON), Rob Payn (Montana State University), and Marc Peipoch (Stroud Water Research Center).
Limnology & Oceanography Bulletin: PDF
What types of OM compounds and microbial matter fluoresce in the ice that we can measure from the borehole walls?
We used a Deep UV fluorescence mapping spectrometer, coupled to a drill system, to scan from the surface to 105 m depth into the Greenland ice sheet. The scan included firn and glacial ice and demonstrated that the instrument is able to determine small (mm) and large (cm) scale regions of OM concentration and discriminate spectral types of organic matter at high resolution. The spectral signatures were consistent with OM fluorescence from microbes, lignins, fused-ring aromatic molecules, including polycyclic aromatic hydrocarbons, and biologically derived materials such as fulvic acids. Our methodology could be useful for detecting microbial and organic hotspots in terrestrial icy environments and on future missions to the Ocean Worlds of our Solar System.
Team: Michael J. Malaska, Rohit Bhartia, and Kenneth S. Manatt, William J. Abbey (Jet Propulsion Laboratory and California Insititue of Technology), John C. Priscu (Montana State University), Boleslaw Mellerowicz, Joseph Palmowski, Gale L. Paulsen, Kris Zacny (Honeybee Robotics), Evan J. Eshelman (Impossible Sensing), and Juliana D’Andrilli (LUMCON)
What is the chemical composition of DOM above methane seeps compared to non-seep Arctic waters?
Gas bearing sediments release methane to the water column from seeps in the Arctic Ocean. The seeping methane dissolves and supports the growth of aerobic methane oxidizing bacteria, but the effect of seepage and seep related biogeochemical processes on water column DOM dynamics is not well constrained. We compared dissolved methane, nutrients, chlorophyll, and particulate matter concentrations and methane oxidation rates from the continental margin of Svalbard and the Barents Sea.
Team: Muhammed Fatih Sert, Bénédicte Ferré, and Anna Silyakova (CAGE), Juliana D'Andrilli (LUMCON), Friederike Gründger (CAGE and Aarhus University), Helge Niemann (CAGE and Utrecht University), Mats A. Granskog (Norwegian Polar Institute), and Alexey K. Pavlov (Polish Academy of Sciences and Fram Centre)
Frontiers in Earth Sciences, Special Issue: Recent Advances in Natural Methane Seep and Gas Hydrate Systems: PDF
Size exclusion chromatography (SEC) in combination with optical measuremets (e.g., absorbance and fluorescence) has become a popular form of analysis to characterize dissolved organic matter (DOM) as a function of molecular size. Here, SEC coupled with in-line absorbance scan and fluorescence emission scan was utilized to derive apparent fluorescence quantum yield (Φf) as a function of molecular weight (MW) for DOM. Individual instrument specific SEC-fluorescence detector correction factors were developed by comparison of a SEC based excitation emission matrix (EEM) to an excitation emission matix EEM generated by a calibrated benchtop fluorometer. The method was then applied to several sample sets to demonstrate how to measure the Φf on unknown DOM samples and to observe changes to Φf following a processing mechanism (ozonation). The Φf of riverine water samples and DOM fulvic acid isolates from Suwannee River and Pony Lake increased from <0.5% to a maximum of ~2.5-3% across the medium to low MW range. Following ozonation of PLFA, the Φf increased most notably in the large MW fractions (elution volumes < 40 mL). Overall, this method provides a means by which highly fluorescent size fractions of DOM can be identified for more detailed analyses of carbon quality and its changes through different processing mechanisms.
Team: Blair Hanson, Shelby Buckley, Sarah Fischer, and Fernando Rosario-Ortiz (University of Colorado Boulder), Urban Wünsch (Technical University of Denmark and Chalmers University of Technology), Kathleen Murphy (Chalmers University of Technology), and Juliana D’Andrilli (LUMCON)
ACS Environmental Science & Technology: Water: PDF
How can we use OM fluorescent signatures to reconstruct past and present atmospheric compositions?
What OM type is preserved in the ice now and what will it do upon release from polar ice sheets in a warming climate?
OM composition from Greenland and Canada were characterized by Excitation Emission Matrices and compared to the first deep ice core OM record (WD, Antarctica). Arctic and Antarctic ice sheets were characterized as reservoirs of reactive carbon and upon release, albeit through one or more bio-, chemico-, and photo-reactive mechanisms, may stimulate positive carbon cycling feedbacks of greenhouse gases exacerbating climate warming.
Project team: Juliana D'Andrilli (LUMCON) and Joseph R. McConnell (Desert Research Institute, Reno, NV)
Journal of Glaciology: PDF