View Abstract

BLURRED LINES: MULTIPLE FRESHWATER AND MARINE TOXINS AT THE LAND-SEA INTERFACE

There have been multiple, dramatic toxin events within the California Current over the last few years, including the 2015 domoic acid event, identification of microcystin poisoning in California sea otters, and the emergence of Diarrheic Shellfish Poisoning (DSP) in the Pacific Northwest. Despite broad public and scientific interest, research, monitoring, and management continue to separate freshwater and marine HABs, and often bias sampling towards organisms/toxins that "should" be present, or have been historical problems. Here we look at San Francisco Bay, a region that historically has been assumed not to have HAB problems. Analysis of whole-water, integrated samplers (Solid Phase Adsorption Toxin Tracking), and shellfish shows that multiple toxins are present nearly all the time, and that at least four suites are present simultaneously in shellfish, including Paralytic Shellfish Toxins (PSTs), Domoic Acid, Microcystins, and DSP toxins. We put these findings in the context of ecological drivers within San Francisco Bay and suggestions for improved monitoring and management efforts to deal with the simultaneous presence of these toxins, with emphasis on changing (seasonal and multi-year) trends in both drivers and toxins.

http://oceandatacenter.ucsc.edu

Authors

Kudela, R. M., University of California Santa Cruz, USA, kudela@ucsc.edu

Peacock, M. B., Northwest Indian College, USA, mdbpeacock@gmail.com

Senn, D., San Francisco Estuarine Institute, USA, davids@sfei.org

Gibble, C. M., California Department of Fish and Wildlife, USA, corinnegibble@gmail.com

Sylvester, Z., San Francisco Estuary Research Institute, USA, zephyrs@sfei.org

Cloern, J. E., US Geological Survey, USA, jecloern@usgs.gov

Details

Oral presentation

Session #:021
Date: 03/03/2017
Time: 10:15
Location: 323 B

Presentation is given by student: No