A5033705722- Marine and coastal ecosystems
- Water Quality Monitoring and Analysis
- Water Quality Monitoring Technologies
- Marine and fisheries research
- Marine Biology and Ecology Research
- Geochemistry and Geologic Mapping
- Remote Sensing in Agriculture
- Coastal wetland ecosystem dynamics
- Microbial Community Ecology and Physiology
- Isotope Analysis in Ecology
- Atmospheric and Environmental Gas Dynamics
- Marine and coastal plant biology
- Air Quality Monitoring and Forecasting
- Peatlands and Wetlands Ecology
- Aquatic Ecosystems and Phytoplankton Dynamics
- Advanced Chemical Sensor Technologies
- Spectroscopy and Chemometric Analyses
- Fish Ecology and Management Studies
- Fire effects on ecosystems
- Marine and environmental studies
- Coral and Marine Ecosystems Studies
- Remote Sensing and LiDAR Applications
- Water Quality and Resources Studies
- Botany, Ecology, and Taxonomy Studies
- Aeolian processes and effects
Creighton University
2012-2024
Oceanography Society
2013
Georgia Southern University
2013
University of Houston
2013
National Oceanic and Atmospheric Administration
2010
Emory University
1989
Savannah River National Laboratory
1982
Consistent, cross-mission retrievals of near-surface concentration chlorophyll-a (Chla) in various aquatic ecosystems with broad ranges trophic levels have long been a complex undertaking. Here, we introduce machine-learning model, the Mixture Density Network (MDN), that largely outperforms existing algorithms when applied across different bio-optical regimes inland and coastal waters. The model is trained validated using sizeable database co-located Chla measurements (n = 2943) situ...
Abstract Inland and coastal waterbodies are critical components of the global biosphere. Timely monitoring is necessary to enhance our understanding their functions, drivers impacting on these functions deliver more effective management. The ability observe from space has led Earth observation (EO) becoming established as an important source information water quality ecosystem condition. However, progress toward a globally valid EO approach still largely hampered by inconsistences over...
Abstract The development of algorithms for remote sensing water quality (RSWQ) requires a large amount in situ data to account the bio-geo-optical diversity inland and coastal waters. GLObal Reflectance community dataset Imaging optical Aquatic environments (GLORIA) includes 7,572 curated hyperspectral reflectance measurements at 1 nm intervals within 350 900 wavelength range. In addition, least one co-located measurement chlorophyll , total suspended solids, absorption by dissolved...
Retrieval of aquatic biogeochemical variables, such as the near-surface concentration chlorophyll-a (Chl a ) in inland and coastal waters via remote observations, has long been regarded challenging task. This manuscript applies Mixture Density Networks (MDN) that use visible spectral bands available by Operational Land Imager (OLI) aboard Landsat-8 to estimate Chl . We utilize database co-located situ radiometric measurements (N = 4,354), referred Type A data, train test an MDN model (MDN )....
We acquired high spectral resolution reflectance data in Carter Lake, a eutrophic oxbow on the Iowa–Nebraska border, from April 1995 to 1996. Chlorophyll a, total seston, sestonic organic matter, Secchi depth, and nephelometric turbidity were determined for each respective measurement. Changes algal taxonomic structure abundance coincided with development senescence of midsummer through autumn bloom Anabaena. Taxonomic was more diverse late winter spring when Synedra sp. (diatom) several...
Based on HYDROLIGHT simulations of more than 2000 reflectance spectra from datasets typical coastal waters with highly variable optically active constituents as well intercomparisons field measurements, the magnitude chlorophyll fluorescence was analyzed and parameterized a function phytoplankton, CDOM, suspended inorganic matter concentrations. Using parameterizations developed, we show that variations in component water leaving radiance are due to variability attenuation quantum yield,...
We examined the influence of abiotic drivers on inter-annual and phenological patterns aboveground biomass for Marsh Cordgrass, Spartina alterniflora, Central Georgia Coast. The linkages between plant response via soil edaphic factors are captured in our graphical conceptual model. used geospatial techniques to scale up situ measurements S. alterniflora landscape level estimates using 294 Landsat 5 TM scenes acquired 1984 2011. For each scene we extracted data from same 63 sampling polygons,...
Abstract The purpose of this paper is to investigate the spectral responses algal chlorophyll and water, under natural sunlight with varying suspended sediment concentrations (SSC). Twenty levels SSC each two types were generated, ranging from 50 1000 mgl−1, in 75101 water containing chlorophyll-a 718 μgl−1 295 μgl−1. Results indicate that sediments do not eliminate prominent patterns chlorophyll, even as reached mgl−1. Between 400 900 nm, relation between reflectance satisfies expression:...
A shallow, 5.4—ha dystrophic Carolina bay wetland was studied between 1974 and 1978 to test the premise that biomass production are constrained by stagnant hydrology dilute, acidic chemistry of wetlands. Our objectives were evaluate: (1) surface subsurface hydrology, (2) sources production, (3) community change along a depth gradient, (4) seasonal patterns. The study compared water levels groundwater in four adjacent wells. cylinder enclosure total harvest procedure 24—h dissolved oxygen...
Five thousand–year history of Native American oyster harvesting practices provides insight into modern reef restoration.
Apalachicola Bay, Florida, accounts for 90% of Florida's and 10% the nation's eastern oyster (Crassostrea virginica) harvesting. Chlorophyll-a concentration total suspended solids (TSS) are two important water quality variables, among other environmental factors such as salinity, production in Bay. In this research, we developed regression models relationships between reflectance Moderate-Resolution Imaging Spectroradiometer (MODIS) Terra 250 m data variables based on Bay-wide field...
Water quality measures for inland and coastal waters are available as discrete samples from professional volunteer water monitoring programs higher-frequency, near-continuous data automated in situ sensors. parameters also estimated model outputs remote sensing. The integration of these data, via assimilation, can result a more holistic characterization highly dynamic ecosystems, consequently improve resource management. It is becoming common to see combinations applied answer relevant...
Experiments were designed to evaluate the effects of five dry pellet diets containing various protein levels on metabolic rates and energy cost food utilization bluegill (Lepomis macrochirus). In 48-h period after feeding increased an average 57% above base established prior presentation. The utilization, estimated as a percentage ingested energy, was [Formula: see text] (range 7.5–32.3%). Positive correlation found between caloric intakes increases in O 2 consumption observed feeding....