A5037564269- Marine and coastal ecosystems
- Coastal wetland ecosystem dynamics
- Methane Hydrates and Related Phenomena
- Marine Bivalve and Aquaculture Studies
- Microbial Community Ecology and Physiology
- Marine and coastal plant biology
- Marine Biology and Ecology Research
- Atmospheric and Environmental Gas Dynamics
- Wastewater Treatment and Nitrogen Removal
- Isotope Analysis in Ecology
- Soil and Water Nutrient Dynamics
- Aquaculture Nutrition and Growth
- Silicon Effects in Agriculture
- Geochemistry and Elemental Analysis
- Peatlands and Wetlands Ecology
- Land Use and Ecosystem Services
- Water Quality Monitoring Technologies
- Industrial Gas Emission Control
- Geological and Geophysical Studies
- Paleontology and Stratigraphy of Fossils
- Marine and fisheries research
- Coastal and Marine Dynamics
- Aquatic Invertebrate Ecology and Behavior
- Aluminum toxicity and tolerance in plants and animals
- Coral and Marine Ecosystems Studies
Smithsonian Environmental Research Center
2023-2024
Boston University
2018-2024
University of Massachusetts Boston
2020
University of Virginia
2014
Charlottesville Medical Research
2014
May Institute
2014
Abstract The role of coastal wetlands as natural ‘blue carbon’ sinks may be counter‐acted by emissions methane (CH 4 ) and nitrous oxide (N 2 O). Site‐specific fluxes these two potent greenhouse gases from show high spatial temporal variability , making global estimates sensitive to statistical assumptions uncertainties. Here, we review the magnitude CH N O mangroves, saltmarshes seagrasses identify direct indirect drivers that can control production consumption pathways. Significant...
Abstract Microorganisms oxidize organic nitrogen to nitrate in a series of steps. Nitrite, an intermediate product, accumulates at the base sunlit layer subtropical ocean, forming primary nitrite maximum, but can accumulate throughout higher latitudes. We model nitrifying chemoautotrophs marine ecosystem and demonstrate that microbial community interactions explain distributions. Our theoretical framework proposes concentration than ammonium because differences underlying redox chemistry...
Production of animal protein is associated with high greenhouse gas (GHG) emissions. Globally, oyster aquaculture increasing as a way to meet growing demands for protein, yet its GHG-emissions are largely unknown. We quantified from the three main constituents GHG-release terrestrial livestock production: fermentation in gut, manure management, and fodder production. found that oysters release no methane (CH4) only negligible amounts nitrous oxide (0.00012 ± 0.00004 μmol N2O gDW-1 hr-1)...
Abstract. In the current era of rapid climate change, accurate characterization climate-relevant gas dynamics – namely production, consumption, and net emissions is required for all biomes, especially those ecosystems most susceptible to impact change. Marine environments include regions that act as sources or sinks numerous climate-active trace gases including methane (CH4) nitrous oxide (N2O). The temporal spatial distributions CH4 N2O are controlled by interaction complex biogeochemical...
Oyster aquaculture is expanding globally, and there has been a recent research surge examining how oyster farms alter coastal ecosystems. Yet, until now, the role of time in these studies largely missing. Here we used an situ chronosequence approach to determine presence ( Crassostrea virginica ) altered sediment nitrogen (N), oxygen (O 2 ), phosphorus (P) cycling. Overall found that sum fluxes increased significantly following addition aquaculture, switched from net N consumption (i.e....
Abstract Seagrasses are globally important ecosystems that can help mitigate climate change by sequestering carbon (C). The net impact seagrass meadows have on the climate, however, also depends methane (CH 4 ) and nitrous oxide (N 2 O) fluxes. By not accounting for CH N O fluxes, we may be overestimating or underestimating true C sequestration capacity of seagrasses. Yet, few observations fluxes available. Here, quantified summer, dark/light across sediment–water interface from ( Zostera...
Over the last two decades, recognition of important role terrestrial plants play in regulating silicon (Si) cycling has emerged. Si improves plant fitness by protecting them from abiotic (e.g., desiccation) and biotic fungal attack) stressors. Once incorporated into biomass this biogenic is more bio-available than lithogenic material which it was ultimately derived. Thus a key function amount timing availability downstream ecosystems. Recent work highlighted importance salt marshes temperate...
Abstract. In the current era of rapid climate change, accurate characterization climate-relevant gas dynamics – namely production, consumption and net emissions is required for all biomes, especially those ecosystems most susceptible to impact change. Marine environments include regions that act as sources or sinks a number climate-active trace gases including methane (CH4) nitrous oxide (N2O). The temporal spatial distributions CH4 N2O are controlled by interaction complex biogeochemical...
Filter-feeders play an important role in regulating nutrient availability coastal systems, with implications for phytoplankton community composition, primary production, and food web structure. The of filter-feeding bivalves the nitrogen phosphorus cycles is relatively well established, but their impact on silicon (Si) cycling remains poorly understood. To help reduce this uncertainty, we quantified rates Si recycling size various pools at oyster ( Crassostrea virginica ) farm. We found that...
The global aquaculture industry has grown substantially, with consequences for coastal ecology and biogeochemistry. Oyster can alter the availability of resources microbes that live in sediments as oysters move large quantities organic material to via filter feeding, possibly leading changes structure function sediment microbial communities. Here, we use a chronosequence approach investigate impacts oyster farming on communities over 7 years activity temperate system. We detected shifts...
Methane is a powerful greenhouse gas with global warming potential 34 times that of carbon dioxide. Recent work has demonstrated high methane concentrations in groundwater wells. While previous research focused on anthropogenic sources wells, it also possible produced situ via archaea. Here we determine the source(s) wells Boston, MA. We assess well methanogen and methanotroph community. To do so, collected gas, water, DNA samples from nine throughout city between 2017 2019. Methane,...