A5050312661- Marine and coastal ecosystems
- Oil Spill Detection and Mitigation
- Algal biology and biofuel production
- Toxic Organic Pollutants Impact
- Microbial Community Ecology and Physiology
- Microbial bioremediation and biosurfactants
- Aquatic Ecosystems and Phytoplankton Dynamics
- Quantum Dots Synthesis And Properties
- Marine Toxins and Detection Methods
- Copper-based nanomaterials and applications
- Environmental Chemistry and Analysis
- Photosynthetic Processes and Mechanisms
- Analytical Chemistry and Sensors
- Microplastics and Plastic Pollution
- Chalcogenide Semiconductor Thin Films
- Water Quality Monitoring and Analysis
- Methane Hydrates and Related Phenomena
- Wastewater Treatment and Reuse
- Protist diversity and phylogeny
- Ocean Acidification Effects and Responses
- Biocrusts and Microbial Ecology
- Marine Biology and Ecology Research
- Isotope Analysis in Ecology
- Metabolomics and Mass Spectrometry Studies
- Atmospheric and Environmental Gas Dynamics
Bigelow Laboratory for Ocean Sciences
2024
Texas A&M University at Galveston
2016-2024
Monash University
2015-2018
Anna University, Chennai
2015-2017
Australian Regenerative Medicine Institute
2015
Abstract The production of extracellular polymeric substances (EPS) by planktonic microbes can influence the fate oil and chemical dispersants in ocean through emulsification, degradation, dispersion, aggregation, and/or sedimentation. In turn, microbial community structure function, including character EPS, is influenced concentration composition dispersants. For example, marine snow its sedimentation flocculent accumulation to seafloor were observed on an expansive scale after Deepwater...
Hurricane Harvey (category 4 storm) made landfall along the coast of Texas (USA) and then stalled out over Louisiana, releasing 1.29 x 1011 m3 precipitation 5 days. This caused extensive flooding that elevated freshwater river discharge land runoff into Galveston Bay eventually Gulf Mexico. The floodwaters delivered a significant influx terrigenous dissolved organic matter, pollutants nutrients with terrestrial associated microbes. Over 24 days following event, samples were collected on five...
Sinking marine oil snow was found to be a major mechanism in the transport of spilled from surface deep sea following Deepwater Horizon (DwH) spill. Marine formation is primarily facilitated by extracellular polymeric substances (EPS), which are mainly composed proteins and carbohydrates secreted microorganisms. While numerous bacteria have been identified degrade oil, there paucity knowledge on that produce EPS response Corexit exposure northern Gulf Mexico (nGoM). In this study, we...
Diatoms secrete a significant amount of polysaccharides, which can serve as critical organic carbon source for bacteria. The 2010 Deepwater Horizon oil spill exposed the Gulf Mexico to substantial amounts that also impacted phytoplankton community. Increased production exopolymeric substances was observed after this spill. Polysaccharides make up major fraction substances; however, their physiological role during an remains poorly understood. Here, we analyzed polysaccharides in growth and...
Culture experiments were conducted on ten phytoplankton species to examine their biological and physiological responses during exposure oil a combination of dispersant. The tested included range taxa typically found in the Gulf Mexico such as cyanobacteria, chlorophytes, diatoms. Cultures exposed Macondo surrogate using water accommodated fraction (WAF), dispersed chemically enhanced WAF (CEWAF) diluted CEWAF, replicate conditions following Deepwater Horizon spill Mexico. A observed, that...
:Substantial research has been devoted to testing the potential for algal-derived biofuels. However, because of high cost and low biomass productivity algal mass culture, this is not yet a commercial reality. Most focused on optimizing photoautotrophic cultivation biomass. Other modes growing algae such as heterotrophy mixotrophy need be investigated. Our objective was compare macromolecular pools Scenedesmus sp. grown under heterotrophic conditions, expose cultures light after their growth...
Extracellular enzymes and extracellular polymeric substances (EPS) play a key role in overall microbial activity, growth survival the ocean. EPS, being amphiphilic nature, can act as biological surfactant an oil spill situation. help microbes to digest utilize fractions of organic matter, including which stimulate enhance activity. These natural processes might have been altered during 2010 Deepwater Horizon due presence hydrocarbon dispersant. This study aims investigate bacterial...
Lakes are significant sources of greenhouse gases to the atmosphere globally (DelSontro et al. 2018). The magnitude these fluxes greatly depend on a lake’s trophic status that is sensitive environmental change. To address considerable gaps in our understanding regarding how forecasted shifts environment may affect gas dynamics lake ecosystems, we investigated underlying biogeochemical mechanisms control origins and fate methane (CH 4 ) carbon-dioxide (CO 2 oligotrophic Lake Maggiore Italy....
Bio-cementation is a process by which microbes within the sediment produce bonds between individual particles through biochemical reactions that can occur naturally under right conditions or be induced artificially supplying and needed nutrition. Bio- cementation effectively increases erosion resistance of material. A specific bio-cementation called microbially calcium carbonate precipitation (MICP) explored via field laboratory tests to quantify its effect on erodibility slope stability....
Microbes release exoenzymes into the environment to break down complex organic matter and nutrients simpler forms that can be assimilated utilized, thereby addressing their cellular carbon, nitrogen, phosphorus requirements. Despite its importance, factors associated with synthesis of are not clearly defined, especially for marine environment. Here, we found nitrogen acquisition were strongly correlated inorganic nutrient levels, while those carbon depended on type available. We also show a...
Marine snow was implicated in the transport of oil to seafloor during Deepwater Horizon spill, but exact processes remain controversial. In this study, we investigated concentrations and distributions 16 USEPA priority polycyclic aromatic hydrocarbons (PAHs) marine aggregates collected a mesocosm experiment. Seawater only, water accommodated fraction (WAF), Corexit-enhanced WAF (DCEWAF) were incubated for d. Both DCEWAF enriched heavy molecular weight PAHs depleted naphthalene. had 2.6 times...