A5017719758- Atmospheric chemistry and aerosols
- Marine Biology and Ecology Research
- Atmospheric aerosols and clouds
- Marine and coastal ecosystems
- Methane Hydrates and Related Phenomena
- Arctic and Antarctic ice dynamics
- Microbial Community Ecology and Physiology
- Geology and Paleoclimatology Research
- Icing and De-icing Technologies
- Geochemistry and Elemental Analysis
- Paleontology and Stratigraphy of Fossils
- Geological formations and processes
- Genomics and Phylogenetic Studies
- Isotope Analysis in Ecology
- Coral and Marine Ecosystems Studies
- Advanced Aircraft Design and Technologies
- nanoparticles nucleation surface interactions
- Atmospheric Ozone and Climate
- Marine and fisheries research
- Microfluidic and Capillary Electrophoresis Applications
- Marine and coastal plant biology
- Geomagnetism and Paleomagnetism Studies
- Mine drainage and remediation techniques
- Advanced biosensing and bioanalysis techniques
- Air Quality and Health Impacts
Stony Brook University
2013-2023
South Baylo University
2022
State University of New York
1986-2008
North Carolina State University
1991
Universidade Federal Fluminense
1991
Wayne State University
1986
The activities of infaunal macrobenthos strongly influence the pathways, rates, and extent organic matter remineralization associated reactions in marine sediments. Solute transport during irrigation is a particularly important process that stimulates microbial activity net remineralization, both within adjacent to bioturbated zone. Part stimulation proximal zone due redox oscillation oxidant supply transport, but part near far-field effects are result other factors. Experiments designed...
Meiofauna typically inhabit sedimentary zones having substantial concentration gradients in biogcochemically important solutes such as O2. Diffusion experiments with the conservative tracers Cl− and Br− demonstrate that natural populations of meiofauna (∼30–100 cm 3) can increase transport rates these by factors ∼1.7–2.3 × (for T > 10°C) compared uninhabited sediments. The effect varies seasonally, directly temperature probably faunal composition. About 20–40% is due to increased porosity...
As a necessary step in the study of prokaryotic diversity using 16S rDNA libraries, authors should evaluate how well their libraries represent source environment. Phylotype‐richness estimates can be used to judge whether library represents sufficiently for its intended purpose. We have argued that richness are most useful if first shown large enough yield stable estimates. In this article, we (1) two potentially suitable, non‐parametric estimators (S ACE and S Chao1 ), tested against model...
Abstract. Ice formation in the atmosphere by homogeneous and heterogeneous nucleation is one of least understood processes cloud microphysics climate. Here we describe our investigation marine environment as a potential source atmospheric IN experimentally observing ice from aqueous NaCl droplets comparing against containing intact fragmented diatoms. Homogeneous are studied function temperature water activity, aw. Additional analyses presented on dependence diatom surface area volume...
Biogenic particles have the potential to affect formation of ice crystals in atmosphere with subsequent consequences for hydrological cycle and climate. We present laboratory observations heterogeneous nucleation immersion deposition modes under atmospherically relevant conditions initiated by Nannochloris atomus Emiliania huxleyi, marine phytoplankton structurally chemically distinct cell walls. Temperatures at which freezing, melting, water uptake occur are observed using optical...
Sea spray aerosol (SSA) is a widely recognized important source of ice-nucleating particles (INPs) in the atmosphere. However, composition-specific identification, nucleation processes, and ice rates SSA-INPs have not been well constrained. Microspectroscopic characterization ambient laboratory-generated SSA confirms that water-borne exudates from planktonic microorganisms composed mixture proteinaceous polysaccharidic compounds act as agents (INAs). These data previously published mesocosm...
We investigated how regional differences in environmental parameters influenced enrichment of amino acids the sea surface microlayer relative to underlying bulk seawater. Concentrations and compositions dissolved free (DFAA), combined (DCAA), particulate (PAA) were measured corresponding subsurface waters along a transect from coastal Massachusetts open ocean Sargasso Sea. also total bacteria concentrations, percent with damaged membranes, concentrations virus‐like particles. Microlayer...
The dynamics of benthic Foraminifera assemblages can be used to examine carbonate dissolution processes in nearshore sediments and as a general assay physical‐chemical factors affecting survival juvenile benthos. Abundances total (live dead) fluctuate regularly throughout the year Long Island Sound (LIS) mud deposits, with highest numbers spring‐summer lowest winter. Essentially all forams disappear each year. Pore‐water undersaturation respect minerals coincides periods rapid disappearance...
Like Bacteria, Archaea occur in a wide variety of environments, only some which can be considered 'extreme'. We compare archaeal diversity, as represented by 173 16S rRNA gene libraries described published reports, to bacterial diversity 79 from the same source environments. An objective assessment indicated that 114 and 45 were large enough yield stable estimates total phylotype richness. Archaeal seldom or diverse However, relatively larger proportion effectively capture rare well dominant...