TY - JOUR
T1 - Seasonal Toxicity Observed with Amphipods (Eohaustorius estuarius) at Paleta Creek, San Diego Bay, USA
AU - Hayman, Nicholas T.
AU - Rosen, Gunther
AU - Colvin, Marienne A.
AU - Chadwick, Bart D.
AU - Rao, Balaji
AU - Athanasiou, Dimitrios
AU - Rakowska, Magdalena
AU - Drygiannaki, Ilektra
AU - Burton, G. Allen
AU - Reible, Danny D.
N1 - Funding Information:
The present study was funded by the US Department of Defense's Strategic Environmental Research and Development Program (project ER‐2428). We would like to thank J. Munson‐Decker, M. Bejar, and M. Hudson for laboratory and field support that made this project successful.
Funding Information:
The present study was funded by the US Department of Defense's Strategic Environmental Research and Development Program (project ER-2428). We would like to thank J. Munson-Decker, M. Bejar, and M. Hudson for laboratory and field support that made this project successful.
Publisher Copyright:
© 2019 SETAC
PY - 2020/1/1
Y1 - 2020/1/1
N2 - To assess potential impacts on receiving systems, associated with storm water contaminants, laboratory 10-d amphipod (Eohaustorius estuarius) survival toxicity tests were performed using intact sediment cores collected from Paleta Creek (San Diego Bay, CA, USA) on 5 occasions between 2015 and 2017. The approach included deposition-associated sediment particles collected from sediment traps placed at each of 4 locations during the 2015 to 2016 wet seasons. The bioassays demonstrated wet season toxicity, especially closest to the creek mouth, and greater mortality associated with particles deposited in the wet season compared with dry season samples. Grain size analysis of sediment trap material indicated coarser sediment at the mouth of the creek and finer sediment in the outer depositional areas. Contaminant concentrations of metals (Cd, Cu, Hg, Ni, Pb, and Zn) and organic compounds (polycyclic aromatic hydrocarbons [PAHs], polychlorinated biphenyls [PCBs], and pesticides) were quantified to assess possible causes of toxicity. Contaminant concentrations were determined in the top 5 cm of sediment and porewater (using passive samplers). Whereas metals, PAHs, and PCBs were rarely detected at sufficient concentrations to elicit a response, pyrethroid pesticides were highly correlated with amphipod toxicity. Summing individual pyrethroid constituents using a toxic unit approach suggested that toxicity to E. estuarius could be associated with pyrethroids. This unique test design allowed delineation of spatial and temporal differences in toxicity, suggesting that storm water discharge from Paleta Creek may be the source of seasonal toxicity. Environ Toxicol Chem 2019;39:229–239.
AB - To assess potential impacts on receiving systems, associated with storm water contaminants, laboratory 10-d amphipod (Eohaustorius estuarius) survival toxicity tests were performed using intact sediment cores collected from Paleta Creek (San Diego Bay, CA, USA) on 5 occasions between 2015 and 2017. The approach included deposition-associated sediment particles collected from sediment traps placed at each of 4 locations during the 2015 to 2016 wet seasons. The bioassays demonstrated wet season toxicity, especially closest to the creek mouth, and greater mortality associated with particles deposited in the wet season compared with dry season samples. Grain size analysis of sediment trap material indicated coarser sediment at the mouth of the creek and finer sediment in the outer depositional areas. Contaminant concentrations of metals (Cd, Cu, Hg, Ni, Pb, and Zn) and organic compounds (polycyclic aromatic hydrocarbons [PAHs], polychlorinated biphenyls [PCBs], and pesticides) were quantified to assess possible causes of toxicity. Contaminant concentrations were determined in the top 5 cm of sediment and porewater (using passive samplers). Whereas metals, PAHs, and PCBs were rarely detected at sufficient concentrations to elicit a response, pyrethroid pesticides were highly correlated with amphipod toxicity. Summing individual pyrethroid constituents using a toxic unit approach suggested that toxicity to E. estuarius could be associated with pyrethroids. This unique test design allowed delineation of spatial and temporal differences in toxicity, suggesting that storm water discharge from Paleta Creek may be the source of seasonal toxicity. Environ Toxicol Chem 2019;39:229–239.
KW - Amphipods
KW - Pyrethroids
KW - Recontamination
KW - Seasonal
KW - Sediment toxicity
KW - Stormwater
UR - http://www.scopus.com/inward/record.url?scp=85077042057&partnerID=8YFLogxK
U2 - 10.1002/etc.4619
DO - 10.1002/etc.4619
M3 - Article
C2 - 31622513
AN - SCOPUS:85077042057
VL - 39
SP - 229
EP - 239
JO - Environmental Toxicology and Chemistry
JF - Environmental Toxicology and Chemistry
SN - 0730-7268
IS - 1
ER -