A5065472496- Mercury impact and mitigation studies
- Toxic Organic Pollutants Impact
- Isotope Analysis in Ecology
- Heavy metals in environment
- Marine animal studies overview
- Marine and coastal ecosystems
- Air Quality and Health Impacts
- Microbial Community Ecology and Physiology
- Environmental Science and Water Management
- Environmental remediation with nanomaterials
- Fish Ecology and Management Studies
- Water Quality Monitoring Technologies
- Plant Ecology and Soil Science
- nanoparticles nucleation surface interactions
- Ocean Acidification Effects and Responses
- Chemical Synthesis and Characterization
- Geochemistry and Elemental Analysis
- Marine Biology and Ecology Research
- Geological Studies and Exploration
- Adsorption and biosorption for pollutant removal
- Diatoms and Algae Research
- Paleontology and Stratigraphy of Fossils
- Heavy Metal Exposure and Toxicity
- Environmental DNA in Biodiversity Studies
- Climate change and permafrost
University of Southern California
2020-2024
Southern California University for Professional Studies
2022-2024
Southern California Earthquake Center
2024
University of Connecticut
2018-2023
Foton Motors (China)
2018
Gustavus Adolphus College
2018
The most critical step for methylmercury (MeHg) bioaccumulation in aquatic food webs is phytoplankton uptake of dissolved MeHg. Dissolved organic matter (DOM) has been known to influence MeHg uptake, but the mechanisms have remained unclear. Here we show that concentration DOM-associated thiol functional groups (DOM-RSH) varies substantially across contrasting systems and dictates speciation bioavailability phytoplankton. Across our 20 study sites, DOM-RSH concentrations decrease 40-fold...
Abstract Rapid warming in the Arctic threatens to destabilize mercury (Hg) deposits contained within soils permafrost regions. Yet current estimates of amount Hg vary by ∼4 times. Moreover, how will be released environment as thaws remains poorly known, despite threats water quality, human health, and environment. Here we present new measurements total (THg) contents discontinuous Yukon River Basin Alaska. We collected riverbank floodplain sediments from exposed banks bars near villages...
Coastal sediments are an important site for transient and long-term mercury (Hg) storage, they foster a geochemical environment optimal Hg methylation. Therefore, efforts have been taken to constrain the role of as source methylmercury (MeHg) estuarine water column. This study employed Gust Microcosm Erosion Core system capable quantifying particle removal from undisturbed cores under measurable shear stress conditions assess particulate MeHg exchange between Samples were collected...
Coastal and oceanic DOM formed stable mercury sulfide nanoparticle solutions but smaller sized particles were obtained when coastal was used.
Abstract In vitro incubations using natural marine communities can provide insight into community structure and function in ways that are challenging through field observations alone. We have designed a minimal metal incubation system for controlled repeatable experimentation of microbial communities. The systems, dubbed Pelagic Ecosystem Research Incubators (PERIcosms), 115 L, conical tanks to sample suspended, settled, wall associated material month long periods. PERIcosms combine some the...
We examined how different landscape areas in a catchment containing northern ombrotrophic peatland and upland mineral soils responded to dramatic decreases atmospheric deposition of lead (Pb). Pb concentrations the outflow stream from measured 2009-2015 indicated continued mobilization export derived historic inputs bog. In contrast, surface peat runoff have declined response reductions deposition. Relative early 1980s, streamflow decreased only ∼50%, while subsurface by more than 90%. Water...
<title>Abstract</title> The efficacy of the marine biological carbon pump is tied to new production phytoplankton which require nitrogen and phosphorus grow. Globally, nitrate phosphate are delivered from deep surface waters incorporated into biomass at molar ratios near 16:1, N:P “Redfield ratio.” Latitudinally, particulate vary, often attributed two mechanisms: variations in microbial community composition physiological acclimation. How these mechanisms influence plankton growth...