A5059890616- Marine and coastal ecosystems
- Marine Biology and Ecology Research
- Oceanographic and Atmospheric Processes
- Coastal wetland ecosystem dynamics
- Coastal and Marine Management
- Geology and Paleoclimatology Research
- Tropical and Extratropical Cyclones Research
- Ocean Acidification Effects and Responses
- Isotope Analysis in Ecology
- Microbial Community Ecology and Physiology
- Marine and fisheries research
- Atmospheric and Environmental Gas Dynamics
- Reservoir Engineering and Simulation Methods
- Hydrocarbon exploration and reservoir analysis
- Plant Water Relations and Carbon Dynamics
- Heavy metals in environment
- Oil Spill Detection and Mitigation
- Coastal and Marine Dynamics
- Geochemistry and Geologic Mapping
- Cassava research and cyanide
- Radioactive contamination and transfer
- Fire effects on ecosystems
- Disaster Management and Resilience
- Forest Management and Policy
- Pharmaceutical and Antibiotic Environmental Impacts
The University of Texas at Austin
2010-2024
Stony Brook University
2006-2011
William & Mary
2010
Old Dominion University
2010
We apply multivariate statistics to explore the large data sets encountered from Fourier transform ion cyclotron resonance mass spectra of dissolved organic matter (DOM). Molecular formula assignments for individual constituents DOM are examined by hierarchal cluster analysis (HCA) and principal component (PCA), measure relationships between numerous samples. compare two approaches: (1) using averages elemental ratios double bond equivalents calculated formulas, (2) employing formulas either...
Tropical cyclones drive coastal ecosystem dynamics, and their frequency, intensity, spatial distribution are predicted to shift with climate change. Patterns of resistance resilience were synthesized for 4138 time series from n = 26 storms occurring between 1985 2018 in the Northern Hemisphere predict how ecosystems will respond future disturbance regimes. Data grouped by (fresh water, salt terrestrial, wetland) response categories (biogeochemistry, hydrography, mobile biota, sedentary...
Settling particles were collected from the Ligurian Sea in northwestern Mediterranean May 2003 and separated by elutriation into different settling velocity classes (>230, 115–230, 58–115, <58 m d −1 ). Particles of incubated for 5 to study their biodegradability. Particulate opal content organic compound composition (amino acids, pigments, lipids, carbohydrates) analyzed initially at regular time intervals during incubation period. Most (48–67% total mass) sank greater than 230...
Abstract Tropical cyclones play an increasingly important role in shaping ecosystems. Understanding and generalizing their responses is challenging because of meteorological variability among storms its interaction with We present a research framework designed to compare tropical cyclone effects within across ecosystems that: a) uses disaggregating approach that measures the individual ecosystem components, b) links response components at fine temporal scales meteorology antecedent...
Abstract Arid subtropical climates often oscillate between drought and wet conditions, leading to a “flood or famine” paradigm for estuarine freshwater inflow, in which sporadic storm events drive dynamic changes salinity nutrient availability. Transitioning from prolonged conditions can impact phytoplankton communities. The Mission‐Aransas Estuary, located on the south Texas coast, transitioned 5‐yr (2010–2015) (2015–2020), punctuated by several large flood direct of category 4 Hurricane...
Abstract Understanding of nitrogen cycling on continental shelves, a critical component global nutrient cycling, is hampered by limited observations compared to the strong variability wide range time and space scales. Numerical models have potential partially alleviate this issue filling spatiotemporal data gaps hence resolving annual area‐integrated fluxes. In study, three‐dimensional biogeochemical‐circulation model was implemented simulate Mid‐Atlantic Bight (MAB) budget. Model results...
Abstract Decomposition of particulate organic matter (POM) plays a key role in the formation hypoxia subsurface waters coastal ocean, yet little is known about lability and transformation POM hypoxic zone. Suspended particles were collected from surface to overlying (~30 cm above sediment‐water interface) along shelf northern Gulf Mexico (nGOM) late spring/early summer 2010–2013. Total hydrolyzable amino acids (THAA) pigments measured these samples trace lability. The degradation indices,...
Abstract An improved extended optimum multiparameter (eOMP) analysis was applied to hydrographic (temperature and salinity), water chemistry data, including dissolved oxygen (O 2 ), nutrients (nitrate plus nitrite, phosphate, silicate), inorganic carbon (DIC), total alkalinity (TAlk) data collected during late spring summer from 2006 2012 in bottom waters off the Louisiana coast, explore dynamics stoichiometry of DIC production development maintenance hypoxia. Our demonstrated that...
<title>Abstract</title> Major hurricanes can greatly affect sediment biogeochemical processes in coastal bays and estuaries through strong storm surges resuspension, yet the impacts on geochemistry have rarely been evaluated. Here of Mission Aransas Estuary, Texas, was systematically evaluated prior to after Hurricane Harvey, a Category 4 storm. The median grain size surface sediments estuary significantly increased, but bulk total organic carbon content (TOC%) remained relatively constant....
NOAA Climate Program Office, Coastal and Ocean Applications (NA12OAR4310104).