|2019 - Present||Assistant Professor, Nova Southeastern University ‐ Halmos College of Natural Sciences and Oceanography, Department of Marine and Environmental Science|
|2014 - 2019||Scripps Postdoctoral Researcher, University of California - San Diego|
|2012 - 2014||Graduate Teaching Assistant and Guest Lecturer, Southern Cross University|
|2014||CCBR Postdoctoral Fellow, Southern Cross University|
|2008 - 2011||Laboratory Manager, College of Charleston ‐ Grice Marine Lab, DiTullio Lab|
|2005 - 2007||Graduate Teaching and Research Assistant, University of North Carolina at Wilmington|
|2004 - 2005||Environmental Scientist, QORE Property Sciences|
|2003 - 2004||Undergraduate Student Assistant, University of Miami ‐ Rosenstiel School of Marine and Atmospheric Science|
|2001||Summer Research Intern, GlaxoSmithKline|
|2014||Ph.D. - Biogeochemistry, Southern Cross University|
|2007||M.S. - Marine Biology, University of North Carolina at Wilmington|
|2004||B.S. - Biology & English, University of Miami|
Pore Water Conditions Driving Calcium Carbonate Dissolution in Reef Sands Geochimica et Cosmochimica Acta (2020)
Due to decreases in seawater pH resulting from ocean acidification, permeable calcium carbonate reef sands are predicted to be net dissolving by 2050. However, the rate of dissolution and factors that control this rate remain ...
Porewater Carbonate Chemistry Dynamics in a Temperate and a Subtropical Seagrass System Aquatic Geochemistry (2020)
Seagrass systems are integral components of both local and global carbon cycles and can substantially modify seawater biogeochemistry, which has ecological ramifications. However, the influence of seagrass on porewater biogeochemistry has not been fully described, ...
Comparison of Two Methods for Measuring Sea Surface Temperature When Surfing Oceans (2020)
Nearshore coastal waters are among the most dynamic regions on the planet and difficult to sample from conventional oceanographic platforms. It has been suggested that environmental sampling of the nearshore could be improved by mobilising ...
Diel Temperature and pH Variability Scale With Depth Across Diverse Coral Reef Habitats Limnology and Oceanography Letters (2019)
Coral reefs are facing intensifying stressors, largely due to global increases in seawater temperature and decreases in pH. However, there is extensive environmental variability within coral reef ecosystems, which can impact how organisms respond to ...
Seasonal Variability of Calcium Carbonate Precipitation and Dissolution in Shallow Coral Reef Sediments Limnology and Oceanography (2019)
Shallow, permeable calcium carbonate (CaCO3) sediments make up a large proportion of the benthic cover on coral reefs and account for a large fraction of the standing stock of CaCO3. There have been a number ...
Ocean Acidification Refugia in Variable Environments Global Change Biology (2019)
Climate change refugia in the terrestrial biosphere are areas where species are protected from global environmental change and arise from natural heterogeneity in landscapes and climate. Within the marine realm, ocean acidification, or the global ...
Groundwater as a Source of Dissolved Organic Matter to Coastal Waters: Insights from Radon and CDOM Observations in 12 Shallow Coastal Systems Limnology and Oceanography (2019)
The influence of groundwater and pore‐water exchange on dissolved organic matter (DOM) dynamics in coastal surface waters remains poorly understood. Here, we combine bottom up (i.e., groundwater‐derived flux estimates) and top down (i.e., water column ...
Determining Coral Reef Calcification and Primary Production Using Automated Alkalinity, pH and pCO2 Measurements at High Temporal Resolution Estuarine, Coastal and Shelf Science (2018)
We investigated coral reef carbonate chemistry dynamics and metabolic rates using an automated system that measured total alkalinity (TA, 30 min intervals), pH on the total scale (pHT, 10 min intervals) and the partial pressure ...
Short-Term Spatial and Temporal Carbonate Chemistry Variability in Two Contrasting Seagrass Meadows: Implications for pH Buffering Capacities Estuaries and Coasts (2018)
It has been hypothesized that highly productive coastal ecosystems, such as seagrass meadows, could lead to the establishment of ocean acidification (OA) refugia, or areas of elevated pH and aragonite saturation state (Ωa) compared to ...
Temporal Changes in Seawater Carbonate Chemistry and Carbon Export from a Southern California Estuary Estuaries and Coasts (2018)
Estuaries are important subcomponents of the coastal ocean, but knowledge about the temporal and spatial variability of their carbonate chemistry, as well as their contribution to coastal and global carbon fluxes, are limited. In the ...
Coral Reef Carbonate Chemistry Variability at Different Functional Scales Frontiers in Marine Science (2018)
There is a growing recognition for the need to understand how seawater carbonate chemistry over coral reef environments will change in a high-CO2 world to better assess the impacts of ocean acidification on these valuable ...
Coral Reefs Will Transition to Net Dissolving Before End of Century Science (2018)
Ocean acidification refers to the lowering of the ocean’s pH due to the uptake of anthropogenic CO2 from the atmosphere. Coral reef calcification is expected to decrease as the oceans become more acidic. Dissolving calcium ...
Taking the Metabolic Pulse of the World's Coral Reefs PLoS ONE (2018)
Worldwide, coral reef ecosystems are experiencing increasing pressure from a variety of anthropogenic perturbations including ocean warming and acidification, increased sedimentation, eutrophication, and overfishing, which could shift reefs to a condition of net calcium carbonate ...
Expanding Aquatic Observations Through Recreation Frontiers in Marine Science (2017)
Accurate observations of the Earth system are required to understand how our planet is changing and to help manage its resources. The aquatic environment—including lakes, rivers, wetlands, estuaries, coastal and open oceans—is a fundamental component ...
A Sensor Package for Mapping pH and Oxygen from Mobile Platforms Methods in Oceanography (2016)
A novel chemical sensor package named “WavepHOx” was developed in order to facilitate measurement of surface ocean pH, dissolved oxygen, and temperature from mobile platforms. The system comprises a Honeywell Durafet pH sensor, Aanderaa optode ...
Antagonistic Effects of Ocean Acidification and Rising Sea Surface Temperature on the Dissolution of Coral Reef Carbonate Sediments Frontiers in Marine Science (2016)
Increasing atmospheric CO2 is raising sea surface temperature (SST) and increasing seawater CO2 concentrations, resulting in a lower oceanic pH (ocean acidification; OA), which is expected to reduce the accretion of coral reef ecosystems. Although ...
Comparing Chemistry and Census-Based Estimates of Net Ecosystem Calcification on a Rim Reef in Bermuda Frontiers in Marine Science (2016)
Coral reef net ecosystem calcification (NEC) has decreased for many Caribbean reefs over recent decades primarily due to changes in benthic community composition. Chemistry-based approaches to calculate NEC utilize the drawdown of seawater total alkalinity ...
The Synergistic Effects of Ocean Acidification and Organic Metabolism on Calcium Carbonate (CaCO3) Dissolution in Coral Reef Sediments Marine Chemistry (2016)
Ocean acidification (OA) is expected to reduce the net ecosystem calcification (NEC) rates and overall accretion of coral reef ecosystems. However, despite the fact that sediments are the most abundant form of calcium carbonate (CaCO3) ...
Differences in Pigmentation Between Life Cycle Stages in Scrippsiella lachrymosa (dinophyceae) Journal of Phycology (2016)
Various life cycle stages of cyst‐producing dinoflagellates often appear differently colored under the microscope; gametes appear paler while zygotes are darker in comparison to vegetative cells. To compare physiological and photochemical competency, the pigment composition ...
The Omega Myth: What Really Drives Lower Calcification Rates in an Acidifying Ocean ICES Journal of Marine Science (2016)
The literature on ocean acidification (OA) contains a prevalent misconception that reduced organismal calcification rates in an acidifying ocean are driven by a reduction in carbonate ion (CO32−) substrate availability (e.g. Omega or Ω). However, ...
Nitrous Oxide and Methane Dynamics in a Coral Reef Lagoon Driven by Pore Water Exchange: Insights from Automated High‐Frequency Observations Geophysical Research Letters (2015)
Automated cavity ring down spectroscopy was used to make continuous measurements of dissolved methane, nitrous oxide, and carbon dioxide in a coral reef lagoon for 2 weeks (Heron Island, Great Barrier Reef). Radon (222Rn) was ...
Drivers of Carbon Isotopic Fractionation in a Coral Reef Lagoon: Predominance of Demand over Supply Geochimica et Cosmochimica Acta (2015)
The carbon isotopic signature (δ13C) of coral skeletons is influenced by isotopic fractionation (εorg) during photosynthetic dissolved inorganic carbon (DIC) fixation, but only a few direct εorg measurements are available in coral communities. In particular, ...
The Influence of Groundwater Inputs and Age on Nutrient Dynamics in a Coral Reef Lagoon Marine Chemistry (2014)
Tritium dating of groundwater and a radon mass balance was used to assess the contribution of submarine groundwater discharge (SGD) to a nutrient budget in a tropical reef lagoon (Rarotonga, Cook Islands). Open ocean exchange ...
Temperature-Induced Viral Resistance in Emiliania huxleyi (Prymnesiophyceae) PLoS ONE (2014)
Annual Emiliania huxleyi blooms (along with other coccolithophorid species) play important roles in the global carbon and sulfur cycles. E. huxleyi blooms are routinely terminated by large, host-specific dsDNA viruses, (Emiliania huxleyi Viruses; EhVs), making ...