Juliana D'Andrilli

Juliana D'Andrilli
Louisiana Universities Marine Consortium

B.S., Ph.D.

About

41
Publications
11,356
Reads
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1,153
Citations
Citations since 2016
26 Research Items
914 Citations
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2016201720182019202020212022050100150200250
2016201720182019202020212022050100150200250
Introduction
My research interests include the evolution of organic matter (OM) in marine, freshwater, and glacial ecosystems by investigating its quality, quantity, and other environmental contributing biological and geochemical factors to better understand the impact of OM in a changing climate over various time scales. To better understand how OM evolves, a combination of bulk and molecular level analytical instrument is required. http://julesdandrilli.wixsite.com/research
Additional affiliations
August 2019 - present
Louisiana Universities Marine Consortium
Position
  • Professor (Assistant)
October 2014 - July 2019
Montana State University
Position
  • Professor
June 2010 - September 2014
Montana State University
Position
  • PostDoc Position

Publications

Publications (41)
Article
Size exclusion chromatography (SEC) in combination with optical measurements 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 scans and fluorescence emission scans was utilized to derive apparent fluorescence quantum yield (Φf) as a functi...
Article
Full-text available
Over the last 30 years, the optical property community has shifted from conducting dissolved organic matter (DOM) measurements on new complex mixtures in natural and engineered systems to furthering ecosystem understanding in the context of past, present, and future carbon (C) cycling regimes. However, the appropriate use of optical properties to u...
Article
Full-text available
Natural organic matter (NOM) is a complex mixture of biogenic molecules resulting from the deposition and transformation of plant and animal matter. It has long been recognized that NOM plays an important role in many geological, geochemical, and environmental processes. Of particular concern is the fate of NOM in response to a warming climate in e...
Article
Full-text available
The Arctic cryosphere is collapsing, posing overlapping environmental risks. In particular, thawing permafrost threatens to release biological, chemical and radioactive materials that have been sequestered for tens to hundreds of thousands of years. As these constituents re-enter the environment, they have the potential to disrupt ecosystem functio...
Article
Full-text available
We present polar ice core organic matter (OM) fluorescence signatures to reconstruct ancient and modern atmospheric compositions and relate OM signals to past ecological changes. OM composition from three Arctic ice cores (Canada and Greenland) was characterized by fluorescence spectroscopy and compared to an Antarctic OM record. Diverse OM was mea...
Article
Full-text available
Dissociating gas hydrates, submerged permafrost, and gas bearing sediments release methane to the water column from a multitude of seeps in the Arctic Ocean. The seeping methane dissolves and supports the growth of aerobic methane oxidizing bacteria (MOB), but the effect of seepage and seep related biogeochemical processes on water column dissolved...
Conference Paper
Rapid warming is profoundly affecting Arctic ecosystems, accelerating Greenland Ice Sheet (GrIS) melting, reducing sea ice cover, raising sea level and endangering coastal societies and infrastructure. However, large uncertainties remain about the projected rate and magnitude of Arctic cryosphere and ecosystem change in the coming decades under pla...
Conference Paper
Full-text available
Rapid warming is profoundly affecting Arctic ecosystems, accelerating Greenland Ice Sheet (GrIS) melting, reducing sea ice cover, raising sea level and endangering coastal societies and infrastructure. However, large uncertainties remain about the projected rate and magnitude of Arctic cryosphere and ecosystem change in the coming decades under pla...
Article
Full-text available
We used a deep-ultraviolet 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 organic matter concentration and discriminate spect...
Conference Paper
Full-text available
Ice cores have provided seminal records of past environmental change, including abrupt climate change and greenhouse gas concentrations. The National Science Foundation Ice Core Facility (ICF) has been integral to advances in our understanding of natural and anthropogenic climate change. For more than 25 years, the ICF has helped facilitate an incl...
Article
Full-text available
High‐resolution mass spectrometry (HRMS) has become a vital tool for dissolved organic matter (DOM) characterization. The upward trend in HRMS analysis of DOM presents challenges in data comparison and interpretation among laboratories operating instruments with differing performance and user operating conditions. It is therefore essential that the...
Article
Airborne bacteria that nucleate ice at relatively warm temperatures (>-10°C) can interact with cloud water droplets, affecting the formation of ice in clouds and the residency time of the cells in the atmosphere. We sampled 65 precipitation events in southeastern Louisiana over 2 years to examine the effect of season, meteorological conditions, sto...
Article
We conducted this study to quantify long-term cropping related changes in soil organic carbon (SOC) stocks and characterize the optical properties of dissolved organic matter (DOM) after a decadal on-farm experiment in Montana, USA. Soil samples (0–50 cm) were collected from minimum till (MT) and no-till (NT) fields under fallow-winter wheat (Triti...
Cover Page
Full-text available
Cover: In Santibáñez et al. (https://doi.org/10.1029/2018JG004825), image taken in January 2019 shows accretion ice that formed on the bottom of the West Antarctic Ice Sheet where it flows over Subglacial Lake Mercer, Antarctica. The ice-lake water interface is located 1092 m beneath the surface of the ice sheet. The clear accretion ice is located...
Article
Full-text available
The segregation of bacteria, inorganic solutes, and total organic carbon between liquid water and ice during winter ice formation on lakes can significantly influence the concentration and survival of microorganisms in icy systems and their roles in biogeochemical processes. Our study quantifies the distributions of bacteria and solutes between liq...
Article
Full-text available
Dynamics of dissolved organic matter (DOM) in ecosystems are controlled by a suite of interacting physical, chemical, and biological factors. Growing recognition of the associations between microbial communities and metabolism and intrinsic DOM characteristics, highlight the potential importance of microbe-DOM relationships to modulate the role and...
Article
Organic matter (OM) oxidized by slightly alkaline KMnO4, termed permanganate-oxidizable carbon (POXC), has recently emerged as a standardized indicator of active, labile carbon within soil quality frameworks. Yet, qualitative information on POXC, particularly in semiarid drylands, is very scarce. The aim of this study was to characterize POXC withi...
Conference Paper
Full-text available
Methods  Methane emanates from gas bearing sediments into the water column through a number of seeps in the Arctic Ocean 1 , but methane driven processes remain poorly understood  The goal of this study is to investigate changes in DOM compositions, nutrient regime and biochemical properties of the water column under the influence of methane driv...
Article
Full-text available
Linkages between climate change, mountain cryospheres, and aquatic ecological impacts are complex, and understanding them requires knowledge that spans across scientific disciplines and geographic regions. Twenty Chinese and 19 American scientists met for a collaborative workshop from August 21-26, 2017, at Qinghai Lake located in Qinghai Province...
Article
Dissolved organic matter (DOM) plays a critical role in the cycling of nutrients and long-term agricultural sustainability. The composition of DOM in soil is likely altered due to management, yet there is limited knowledge on the effect of long-term cropping on DOM chemical character. Here, we characterized water extractable DOM composition along a...
Article
Full-text available
Dissolved organic matter (DOM) in freshwater environments is an important source of organic carbon, supporting bacterial respiration. Frozen environments cover vast expanses of our planet, with glaciers and ice‐sheets storing upwards of 6 petagrams of organic carbon. It is generally believed that DOM liberated from ice stimulates downstream environ...
Article
Full-text available
Englacial ice contains a significant reservoir of organic material (OM), preserving a chronological record of materials from Earth's past. Here, we investigate if OM composition surveys in ice core research can provide paleoecological information on the dynamic nature of our Earth through time. Temporal trends in OM composition from the early Holoc...
Article
Full-text available
Ice cores preserve diverse materials as millennial-scale proxies for Earth's history. While major ions and elemental analyses are commonly investigated in palaeoclimate reconstructions, the integration of biological measurements is rapidly developing. Although the limited number of data herein impose constraints on broader generalisations, we show...
Article
Full-text available
Rationale Determining the chemical constituents of natural organic matter (NOM) by Fourier Transform Ion Cyclotron Resonance Mass Spectrometry (FTICRMS) remains the ultimate measure for probing its source material, evolution, and transport; however, lability and the fate of organic matter (OM) in the environment remain controversial. FTICRMS-derive...
Article
Full-text available
We present the extensive characterization of Antarctic Pony Lake (PL) dissolved organic matter (DOM), an International Humic Substance Society (IHSS) fulvic acid (FA) reference standard, using electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry (ESI FT-ICR MS) and excitation–emission matrix fluorescence spectroscopy...
Article
Dissolved organic matter (DOM) was investigated along a gradient across the Subtropical Convergence (STC) off the South Island, New Zealand. Ultrahigh resolution electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS), excitation emission matrix fluorescence (EEM) spectroscopy, and molecular lignin analysis t...
Article
Full-text available
Electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry (ESI-FT-ICR-MS) was used to identify the qualitative differences between dissolved organic matter (DOM) in fen and bog porewaters from the Red Lake II system in the Glacial Lake Agassiz Peatlands (GLAP) of northern Minnesota. Approximately 80% of the molecular compo...
Article
Full-text available
We compare the ultrahigh resolution 9.4 T Fourier transform ion cyclotron resonance (FT-ICR) mass spectra of marine dissolved organic matter (DOM) isolated from two sites in the Weddell Sea (Antarctica) obtained by complementary electrospray ionization (ESI) and atmospheric pressure photoionization (APPI). Ions produced by APPI extend to higher car...
Article
Northern peatlands store roughly half as much carbon as is stored as CO2 in the atmosphere in the form of complex biogeopolymers. As climate change proceeds, increasing carbon release from these historically carbon-sequestering environments may represent an unidentified forcing stress on global temperatures. In this work, we have applied absorption...
Article
The 1200 sq km Red Lake peatland in northern Minnesota has been the focus of an ongoing study of carbon-groundwater interactions for over 30 years. This large continuous expanse of peatland contains several major bog complexes, each of which covers over 100 sq. km. Each bog complex has 1) a forested bog crest that grades downslope into 2) gently sl...
Article
Full-text available
Sunlight-induced molecular changes have been observed in two samples of dissolved organic matter (DOM) collected in the Cape Fear River system, North Carolina, USA. The molecular composition of a water sample collected in the Black River (sample B210, salinity 0) and another water sample collected within the Cape Fear River estuary (sample M61, sal...
Article
Permeable coastal sands along the Gulf coast of Florida filter large volumes of water containing terrestrially derived humic materials, but there is very limited data on the biogeochemical and microbial processes affecting Dissolved Organic Matter (DOM) turnover during filtration. DOM undergoes changes as it moves from fresh water sources through e...

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Advancing communication and confidence in the scientific community. Effectively using improv techniques to help people be more comfortable networking and starting conversations.