A5050165027- Marine and coastal ecosystems
- Microbial Community Ecology and Physiology
- Marine Biology and Ecology Research
- Protist diversity and phylogeny
- Marine Toxins and Detection Methods
- Ocean Acidification Effects and Responses
- Environmental DNA in Biodiversity Studies
- Aquatic Ecosystems and Phytoplankton Dynamics
- Marine and fisheries research
- Maritime Navigation and Safety
- Coral and Marine Ecosystems Studies
- Underwater Vehicles and Communication Systems
- Marine Bivalve and Aquaculture Studies
- Isotope Analysis in Ecology
- Per- and polyfluoroalkyl substances research
- Atmospheric chemistry and aerosols
- Toxic Organic Pollutants Impact
- Advanced Chemical Sensor Technologies
- Oil Spill Detection and Mitigation
- Fish Ecology and Management Studies
- Target Tracking and Data Fusion in Sensor Networks
- Microplastics and Plastic Pollution
- Water Quality and Pollution Assessment
- Science Education and Pedagogy
- Privacy-Preserving Technologies in Data
North Carolina State University
2012-2024
North Central State College
2024
University of Southern California
2003-2017
Oceanography Society
2015
Southern California University for Professional Studies
2002
ABSTRACT DNA sequence information has increasingly been used in ecological research on microbial eukaryotes. Sequence-based approaches have included studies of the total diversity selected ecosystems, autecology ecologically relevant species, and identification enumeration species interest for human health. It is still uncommon, however, to delineate protistan based their genetic signatures. The reluctance assign species-level designations sequences part a consequence limited amount...
Ocean acidification and greenhouse warming will interactively influence competitive success of key phytoplankton groups such as diatoms, but how long-term responses to global change affect community structure is unknown. We incubated a mixed natural diatom from coastal New Zealand waters in short-term (two-week) incubation experiment using factorial matrix and/or elevated pCO2 measured effects on structure. then isolated the dominant diatoms clonal cultures conditioned them for 1 year under...
Ocean acidification (OA) research seeks to understand how marine ecosystems and global elemental cycles will respond changes in seawater carbonate chemistry combination with other environmental perturbations such as warming, eutrophication, deoxygenation. Here, we discuss the effectiveness limitations of current approaches used address this goal. A diverse is essential decipher consequences OA organisms, communities, ecosystems. Consequently, benefits each approach must be considered...
Organic matter produced and released by phytoplankton during growth is processed heterotrophic bacterial communities that transform dissolved organic into biomass recycle inorganic nutrients, fueling microbial food web interactions. Bacterial transformation of phytoplankton-derived also plays a poorly known role in the formation chromophoric (CDOM) which ubiquitous ocean. Despite importance cycling, activities are rarely measured concert. To investigate CDOM mediated processing aggregates,...
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...
Because of environmental and health concerns, legacy per- polyfluoroalkyl substances (PFAS) have been voluntarily phased out, thousands emerging PFAS introduced as replacements. Traditional analytical methods target a limited number mainly PFAS; therefore, many species are not routinely assessed in the environment. Nontargeted approaches using high-resolution mass spectrometry therefore used to detect characterize unknown PFAS. However, their ability elucidate chemical structures relies on...
Coastal acidification in southeastern U.S. estuaries and coastal waters is influenced by biological activity, run-off from the land, increasing carbon dioxide atmosphere. Acidification can negatively impact resources such as shellfish, finfish, coral reefs, communities that rely on them. Organismal responses for species located Southeast document large negative impacts of acidification, especially larval stages. For example, toxicity pesticides increases under acidified conditions...
The structure and genetic diversity of marine protistan assemblages were investigated in the upper 500 m water column at a Pacific Ocean time‐series station off coast Southern California. Deoxyribonucleic acid sequence‐based microbial eukaryote was examined January, April, July, October 2001 four depths (5 m, chlorophyll maximum [CM], 150 m). A total 2956 partial 18S ribosomal ribonucleic gene sequences yielded representatives from most major eukaryotic lineages. Notable among taxonomic...
Increasing pCO2 (partial pressure of CO2 ) in an "acidified" ocean will affect phytoplankton community structure, but manipulation experiments with assemblages briefly acclimated to simulated future conditions may not accurately predict the long-term evolutionary shifts that could inter-specific competitive success. We assessed structure changes a natural mixed dinoflagellate bloom incubated at three levels (230, 433, and 765 ppm) short-term experiment (2 weeks). The four dominant species...
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,...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 234:71-84 (2002) - doi:10.3354/meps234071 Active transport of particulate organic carbon and nitrogen by vertically migrating zooplankton in Sargasso Sea Astrid Schnetzer1,*, Deborah K. Steinberg2 1Department Biological Sciences, University Southern California, 3616 Trousdale Parkway, AHF 301, Los...
ore than 70% of our earth is covered by water, yet we have explored less 5% the aquatic environment.Aquatic robots, such as autonomous underwater vehicles (AUVs), and their supporting infrastructure play a major role in collection oceanographic data (e.g., [11], [17], [29]).To make new discoveries improve overall understanding ocean, scientists must use these platforms implementing effective monitoring sampling techniques to study ocean upwelling, tidal mixing, other processes.Effective...
The presence of neurotoxic species within the genus Alexandrium along U.S. coastline has raised concern potential poisoning through consumption contaminated seafood. Paralytic shellfish toxins (PSTs) detected in provide evidence that these harmful events have increased frequency and severity California coast during past 25 years, but timing location occurrences been highly variable. We conducted a 4-year survey King Harbor, CA, to investigate seasonal dynamics catenella particulate saxitoxin...
The eutrophication of waterways has led to a rise in cyanobacterial, harmful algal blooms (CyanoHABs) worldwide. deterioration water quality due excess biomass lakes been well documented (e.g., clarity, hypoxic conditions), but health risks associated with cyanotoxins remain largely unexplored the absence toxin information. This study is first document presence dissolved microcystin, anatoxin-a, cylindrospermopsin, and β-N-methylamino-l-alanine Jordan Lake, major drinking reservoir North...
Domoic acid (DA) is a potent toxin produced by bloom-forming phytoplankton in the genus Pseudo-nitzschia, which responsible for causing amnesic shellfish poisoning (ASP) humans. ASP symptoms include vomiting, diarrhea, and more severe cases confusion, loss of memory, disorientation, even coma or death. This paper describes development validation rapid, sensitive, enzyme linked immunosorbent assay test kit detecting DA using monoclonal antibody. The gives equivalent results to those obtained...