A5047715267- Marine and coastal ecosystems
- Oceanographic and Atmospheric Processes
- Marine and fisheries research
- Coral and Marine Ecosystems Studies
- Marine Biology and Ecology Research
- Underwater Vehicles and Communication Systems
- Marine and coastal plant biology
- Coastal and Marine Dynamics
- Microbial Community Ecology and Physiology
- Oil Spill Detection and Mitigation
- Water Quality Monitoring Technologies
- Underwater Acoustics Research
- Maritime Navigation and Safety
- Marine Toxins and Detection Methods
- Marine and environmental studies
- Ocean Waves and Remote Sensing
- Coastal wetland ecosystem dynamics
- Geology and Paleoclimatology Research
- Isotope Analysis in Ecology
- Marine Ecology and Invasive Species
- Tropical and Extratropical Cyclones Research
- Methane Hydrates and Related Phenomena
- Water Quality Monitoring and Analysis
- Atmospheric and Environmental Gas Dynamics
- Climate variability and models
King Abdullah University of Science and Technology
2015-2024
Red Sea University
2021
University of Southern California
2009-2018
IBM Research - Almaden
2013
Southern California University for Professional Studies
1997-2013
University of Maine
2008
University of Southern Maine
2008
Allan Hancock College
1988-2002
Woodward (United States)
2001
University of California, Irvine
2001
Path planning and trajectory design for autonomous underwater vehicles (AUVs) is of great importance to the oceanographic research community because automated data collection becoming more prevalent. Intelligent required maneuver a vehicle high-valued locations perform collection. In this paper, we present algorithms that determine paths AUVs track evolving features interest in ocean by considering output predictive models. While traversing computed path, provides near-real-time, situ...
Abstract Ocean processes are dynamic and complex occur on multiple spatial temporal scales. To obtain a synoptic view of such processes, ocean scientists collect data over long time periods. Historically, measurements were continually provided by fixed sensors, e.g., moorings, or gathered from ships. Recently, an increase in the utilization autonomous underwater vehicles has enabled more acquisition approach. However, we still do not utilize full capabilities these vehicles. Here present...
Global climate change has profound implications on species distributions and ecosystem functioning. In the coastal zone, ecological responses may be driven by various biogeochemical physical environmental factors. Synergistic interactions can occur when combined effects of stressors exceed their individual effects. The Red Sea, characterized strong gradients in temperature, salinity, nutrients along latitudinal axis provides a unique opportunity to study over range these variables. Using...
Elevated levels of enterococci bacteria, an indicator fecal pollution, are routinely detected in the surf zone at Huntington State and City Beaches southern California. A multidisciplinary study was carried out to identify sources bacteria landward coastline. We find that present high concentrations urban runoff, bird feces, marsh sediments, on marine vegetation. Surprisingly, runoff appears have relatively little impact water quality because long time required for this travel from its...
Field experiments and modeling studies were carried out to characterize the surf zone entrainment along‐shore transport of pollution from two tidal outlets that drain into Huntington Beach Newport Beach, popular public beaches in southern California. The near‐shore pollutants these appears be controlled by prevailing wave conditions coastal currents, fine‐scale features flow field around outlets. An analysis data dye fecal indicator bacteria monitoring reveals flux water is at least 50 300...
Anthropogenic nutrients have been shown to provide significant sources of nitrogen (N) that linked increased primary production and harmful algal blooms worldwide. There is a general perception in upwelling regions, the flux anthropogenic nutrient inputs small relative flux, therefore relatively little effect on productivity coastal waters. To test hypothesis natural (e.g., upwelling) greatly exceed Southern California Bight (SCB), this study compared source contributions N from four major...
Abstract An observational study was performed in the central Southern California Bight Spring 2010 to understand relationship between seasonal spring phytoplankton blooms and coastal processes that included nutrient input from upwelling, wastewater effluent plumes, other processes. Multi‐month Webb Slocum glider deployments combined with MBARI environmental sample processors (ESPs), weekly pier sampling, ocean color data provided a multidimensional characterization of development evolution...
The loss of coral cover is often accompanied by an increase benthic algae, a decline in biodiversity and habitat complexity. However, it remains unclear how surrounding communities influence the trajectories re-colonization between pulse disturbance events. Over 12-month field experiment central Red Sea, we examined healthy (hard-coral dominated) degraded (algae-dominated) reef areas recruitment succession patterns foundation on bare substrates. Crustose coralline algae other calcifiers were...
Pigment-based phytoplankton community composition and primary production were investigated for the first time in Red Sea February-April 2015 to demonstrate how strong south north environmental gradients determine structure offshore regions (along central axis). Taxonomic pigments used as size group markers of pico, nano- microphytoplankton. Phytoplankton rates associated with three groups (pico-, microphytoplankton) estimated using a bio-optical model. Pico- (Synechococcus Prochlorococcus...
Abstract The semi-enclosed nature of the Red Sea (20.2°N–38.5°N) makes it a natural laboratory to study influence environmental gradients on microbial communities. This investigates composition and structure prokaryotes eukaryotes using molecular methods, targeting ribosomal RNA genes across different regions seasons. interaction between spatial temporal scales results in scenarios turbulence nutrient conditions allowing for testing ecological theory that categorizes response plankton...
Abstract We investigated the influence of seagrass canopies on benthic biodiversity bacteria and macroinvertebrates in a Red Sea tropical lagoon. Changes abundance, number taxa assemblage structure were analyzed response to densities (low, SLD; high, SHD; seagrasses with algae, SA), compared unvegetated sediments. Biological environmental variables examined these four habitats (hereafter called treatments), both underlaying sediments overlaying waters, at three randomly picked locations...
Data collection using Autonomous Underwater Vehicles (AUVs) is increasing in importance within the oceanographic research community. Contrary to traditional moored or static platforms, mobile sensors require intelligent planning strategies maneuver through ocean. However, ability navigate high-value locations and collect data with specific scientific merit worth efforts. In this study, we examine use of ocean model predictions determine be visited by an AUV, aid trajectory that vehicle...
We study silicene on hexagonal boron nitride, using first-principles calculations. Since nitride is semiconducting, the interaction with weaker than for metallic substrates. It therefore possible to open a 50 meV band gap in silicene. further address effect of Mn decoration by determining onsite Hubbard parameter, which turns out differ significantly at top and hollow sites. The induced magnetism system analyzed detail.
Harmful algal blooms dominated by the diatom Pseudo-nitzschia spp. have become a perennial but variable event within surface waters near greater Los Angeles area. Toxic during spring seasons from 2005 to 2007 varied strongly in their overall toxicity and duration. Differences bloom dynamics were linked differences storm-induced river discharge following episodic rain events coastal upwelling, both major processes that led injection of nutrients into waters. Heavy runoff early 2005,...