March 9th, 2-4pm
SoCal SETAC hosted our Spring Virtual Meeting on March 9th, from 2 pm to 4 pm on Zoom. We heard from four professionals in our community: Ms. Adrienne Cibor and Mr. Peter Arth from Enthalpy Analytical, Ms. Molly Colvin from the Naval Information Warfare Center Pacific, and Dr. Kari Sant from the San Diego State University Public Health Department. During the second hour, we recreated the magic of our dinner meetings by small breakout room discussion groups to informally network with others in the SoCal SETAC community.
Naval Information Warfare Center Pacific
There is an ongoing need to characterize the source, transport and fate of contaminants when planning for and managing stormwater and sediment cleanup efforts. I will be discussing several technologies adapted from the oceanographic and environmental arenas that could significantly improve our ability to address contaminant source exposure, transport and fate challenges at coastal sites. Each of these technologies has undergone refinement and demonstration testing in active harbor locations. Technologies to be discussed will include: 1) the Drifting Exposure System; 2) the Drifting Particle Simulator; 3) the Sediment Deposition Detector; 4) the RARA; 5) the SEA Ring; and 6) the SABL sediment trap. Incorporation of these technologies into assessment efforts provide multiple line of evidence approaches to provide context for planning and interpretation of site characteristics and prevent future contamination liabilities.
Dr. Kari Sant
San Diego State University, Department of Public Health
Tris(4-chlorophenyl)methanol (TCPMOH) is a novel water contaminant with unknown etiology, but is believed to be a byproduct of DDT manufacturing. It is highly persistent in the environment, and bioaccumulates in marine species. TCPMOH has also been measured in human breast milk, which poses a risk for developing infants. However, almost no toxicity data is currently available. During this presentation, we will examine new data investigating the hazard posed by developmental TCPMOH exposures using the zebrafish model (Danio rerio). We will examine the acute mechanism of response, developmental outcomes, and an emerging concern--metabolic endocrine activity.
Adrienne Cibor and Peter Arth
Multiple Pathway Toxicity and Bioaccumulation Exposure of Cigarette Leachate to Model Marine and Freshwater Organisms
Cigarette waste products, also referred to as cigarette butts, are one of the most abundant form of litter worldwide. The cellulose acetate filters contained in cigarette butts can be transported into aquatic ecosystems, where they may leach hazardous chemicals that have the potential to cause toxicity and bioaccumulate up the food chain. In a multi-year ongoing study, several pathways and endpoints for cigarette butt toxicity have been evaluated including acute and chronic toxicity to fish, bioaccumulation via water and feeding in fish, and bioaccumulation in bivalve species. Exposure routes for organisms have included preparing leachate stock by soaking cigarette butts in freshwater and seawater solutions for 24 hours, as well as incorporating smoked tobacco and filter remnants into food for the fish feeding study. Following the bioaccumulation exposure period of 14 to 28 days, tissues were frozen and analyzed for key constituents to evaluate the potential for tissue accumulation. Planned studies in the future include mixing cigarette waste into sediment to measure the effects in sediment dwelling organisms, and marine amphipod survival, growth, and reproductive effects.
Previous Spring and Fall Meetings
2020 Spring Dinner Meeting
On Wednesday, March 11, SoCal SETAC hosted Richard Gersberg (San Diego State University) and Goran Bozinovic at Leucadia Pizzeria in Encinitas.
2019 Fall Dinner Meeting
On October 16, 2019, SoCal SETAC hosted Richard Gossett from Physis Environmental Laboratories (Anaheim) who discussed sediment contaminant concentrations from the EPA National Coastal Condition Assessment Program and compared the data to those collected in California Bight 13 survey.
Richard Gossett is an environmental chemist and the owner of Physis
Environmental Laboratories in Anaheim. Gossett specializeds on GCMS analyses and expanded his analytical expertise into organophosphorus pesticides, pyrethroids, neonicotinoids,
and contaminants of emerging concern.
2019 Spring Dinner Meeting
On March 7th, SoCal SETAC hosted Regina Wetzer from the LA Natural History Museum who presented a fascinating talk on "Linking specimen-based marine biodiversity with state of the art genetic tools to greatly accelerate understanding of our changing oceans."
Regina Wetzer is Associate Curator and Director of the Marine Biodiversity Center at the Natural History Museum of Los Angeles County (LACM) since 1999. She is currently working with an extraordinary team of Invertebrate Collections Managers who collectively oversee, curate, and manage the great diversity of animals (35 phyla) in the LACM marine invertebrate collections. Her research interests include exploring evolutionary hypotheses involving previously unexplained life history traits, homoplastic morphological features, and biogeographic distributions.In 2016 Wetzer and her team launched the Diversity Initiative for the Southern California Ocean (DISCO) at the LACM. This research initiative is greatly enhancing biodiversity documentation in the marine environment by applying modern genetic technology. [https://research.nhm.org/]
2018 Fall Dinner Meeting
On October 10, 2018, SoCal SETAC hosted University of California Riverside's Dr. Andrew Gray who discussed watershed-scale management, sediment dynamics, and their roles in managing aquatic system health.
Dr. Andrew Gray is an Assistant Professor of Watershed Hydrology at the University of California, Riverside in the Department of Environmental Sciences. His research group investigates the roles of fluvial sediments in determining water quality and fluvial geomorphology, with particular interest in post-wildfire sediment dynamics, coastal sedimentology, watershed scale sediment fingerprinting, and microplastic pollution.
2018 Spring Dinner Meeting
On March 8, 2018, SoCal SETAC hosted University of California Santa Barbara's Dr. Arturo Keller to discuss the Environmental Implications of Nanotechnology.
2017 Fall Dinner Meeting
SoCal SETAC hosted the Fall Dinner meeting at Bagby Beer Company in Oceanside on October 5, 2017. Dr. David Weller from the Marine Mammal Turtle Division at the Southwest Fisheries Science Center provided an overview of emerging concerns of bottlenose dolphins off Southern California based on 30+ years of research.
2017 Spring Dinner Meeting
SoCal SETAC hosted the Spring Dinner meeting in San Pedro on February 23, 2017. Mas Dojiri, PhD, BCES from the Environmental Monitoring Division of LA Sanitation discussed the 1-mile diversion monitoring program of the Hyperion Treatment Plant.