A5086318175- Marine and coastal ecosystems
- Marine Biology and Ecology Research
- Microbial Community Ecology and Physiology
- Isotope Analysis in Ecology
- Atmospheric and Environmental Gas Dynamics
- Atmospheric chemistry and aerosols
- Geology and Paleoclimatology Research
- Hydrocarbon exploration and reservoir analysis
- Toxic Organic Pollutants Impact
- Ocean Acidification Effects and Responses
- Oil Spill Detection and Mitigation
- Methane Hydrates and Related Phenomena
- Petroleum Processing and Analysis
- Oceanographic and Atmospheric Processes
- Coral and Marine Ecosystems Studies
- Arctic and Antarctic ice dynamics
- Fish biology, ecology, and behavior
- Air Quality and Health Impacts
- Metabolomics and Mass Spectrometry Studies
- Aquatic Ecosystems and Phytoplankton Dynamics
- Coastal wetland ecosystem dynamics
- Microbial bioremediation and biosurfactants
- Water Quality Monitoring Technologies
- Fire effects on ecosystems
- Geochemistry and Geologic Mapping
University of Georgia
2015-2024
Rutgers, The State University of New Jersey
2008-2013
Oregon State University
2004-2009
Guangzhou Institute of Geochemistry
2007
Hokkaido University
2004
Universidade de São Paulo
2004
The presence of saccharides is being reported for aerosols taken in urban, rural, and marine locales. commonly found primary are α- β-glucose, β-fructose, sucrose, mycose with lesser amounts other monosaccharides. Saccharide polyols also some airsheds consist mainly sorbitol, xylitol, mannitol, erythritol, glycerol. In temperate climate areas these compounds increase from negligible concentrations winter (usually dominated by levoglucosan related anhydrosaccharides biomass burning) to a...
Despite all of the economic problems and environmental discussions on dangers hazards plastic materials, production worldwide is growing at a rate about 5% per year. Increasing techniques for recycling polymeric materials have been developed during last few years; however, large fraction plastics are still being discarded in landfills or subjected to intentional incidental open-fire burning. To identify specific tracer compounds generated such combustion, both smoke particles from burning...
During the Deepwater Horizon oil well blowout in Gulf of Mexico, application 7 million liters chemical dispersants aimed to stimulate microbial crude degradation by increasing bioavailability compounds. However, effects on biodegradation rates are debated. In laboratory experiments, we simulated environmental conditions comparable hydrocarbon-rich, 1,100 m deep plume that formed during discharge. The presence dispersant significantly altered community composition through selection for...
The purpose of this review is to highlight progress in unraveling carbon cycling dynamics across the continuum landscapes, inland waters, coastal oceans, and atmosphere. Earth systems are intimately interconnected, yet most biogeochemical studies focus on specific components isolation. movement water drives cycle, and, as such, waters provide a critical intersection between terrestrial marine biospheres. Inland, estuarine, well studied regions near centers human population Northern...
Dissolved organic matter (DOM) in the oceans is one of largest pools reduced carbon on Earth, comparable size to atmospheric CO 2 reservoir. A vast number compounds are present DOM, and they play important roles all major element cycles, contribute storage ocean, support marine ecosystems, facilitate interactions between organisms. At heart DOM cycle lie molecular-level relationships individual members ocean microbiome that produce consume them. In past, these connections have eluded clear...
Abstract Constraining the fate of dissolved organic matter (DOM) delivered by rivers is a key to understand global carbon cycle, since DOM mineralization directly influences air‐sea CO 2 exchange and multiple biogeochemical processes. The Amazon River exports large amounts DOM, yet this material in ocean remains unclear. Here we investigate molecular composition transformations River‐ocean continuum using ultrahigh resolution mass spectrometry geochemical biological tracers. We show that...
We investigated expression of genes mediating elemental cycling at the microspatial scale in ocean's largest river plume using, to our knowledge, first fully quantitative inventory and transcripts. The bacterial archaeal communities associated with a phytoplankton bloom Amazon River Plume waters outer continental shelf June 2010 harbored ∼ 1.0 × 10(13) 4.7 10(11) transcripts per liter that mapped several thousand microbial genomes. Genomes from free-living cells were more abundant than those...
Dissolved organic matter (DOM) and heterotrophic bacteria are highly diverse components of the ocean system, their interactions key in regulating biogeochemical cycles major elements. How chemical phylogenetic diversity linked remains largely unexplored to date. To investigate between bacterial DOM, we followed response natural communities two sources phytoplankton-derived DOM over six generation times continuous cultures. Analyses total hydrolysable neutral sugars amino acids, ultrahigh...
Abstract The composition and photochemical transformations of dissolved organic matter (DOM) in the northern North Pacific Ocean were investigated at molecular level using ultrahigh resolution mass spectrometry geochemical tracers. Analyses included vertical profiles experiments which deep sea DOM was exposed to sunlight incubated dark. found be approximately uniform enriched with highly unsaturated compounds, aromatic polycyclic aromatics. Surface had a significantly different composition,...
Abstract Marine dissolved organic matter (DOM) contains one of the largest exchangeable carbon pools on Earth. Riverine input represents an important source DOM to oceans, yet much remains be learned about fate linking terrestrial oceanic cycles through rivers at global scale. Here we use ultrahigh‐resolution mass spectrometry identify 184 molecular formulae that are indicators riverine inputs (referred as t‐Peaks) and track their distribution in deep North Atlantic Pacific Oceans. The...
Spatial and temporal patterns in microbial biodiversity across the Amazon river-ocean continuum were investigated along ~675 km of lower River mainstem, Tapajós tributary, plume coastal ocean during low high river discharge using amplicon sequencing 16S rRNA genes whole water size-fractionated samples (0.2-2.0 µm >2.0 µm). communities varied among tributaries, but mainstem spatially homogeneous tracked seasonal changes co-varying factors. Co-occurrence network analysis identified strongly...
Biomass burning is an important primary source of particles containing biomarker compounds, which are introduced into smoke primarily by direct volatilization/steam stripping and thermal alteration based on combustion conditions. This study presents comprehensive organic compound profiles for from controlled green vegetation native to the predominant temperate semiarid forests western United States. Smoke were extracted with dichloromethane/methanol (2:1, v/v), extracts analyzed as their TMS...
Understanding which compounds comprising the complex and dynamic marine dissolved organic matter (DOM) pool are important in supporting heterotrophic bacterial production remains a major challenge. We eliminated sources of labile phytoplankton products, advected terrestrial material photodegradation products to coastal microbial communities by enclosing water samples situ for 24 h dark. Bacterial genes expression decreased between beginning end incubation chemical formulae that were depleted...
Abstract. Measurements of dissolved organic carbon (DOC), nitrogen (DON), and phosphorus (DOP) concentrations are used to characterize the matter (DOM) pool important components biogeochemical cycling in coastal ocean. Here, we present first edition a global database (CoastDOM v1; available at https://doi.org/10.1594/PANGAEA.964012, Lønborg et al., 2023) compiling previously published unpublished measurements DOC, DON, DOP waters. These data complemented by hydrographic such as temperature...