Come join Compliance Services International (CSI) staff consultants, Rick Kemman, Jeff Wirtz, David Campana, and Kayla Campasino as they head to the 25th Annual Meeting of the Pacific Northwest Chapter of the Society of Environmental Toxicology and Chemistry (PNW-SETAC) Conference in Bellingham, WA. If you are going to be in attendance and would like to have a conversation regarding CSI’s regulatory and scientific consulting services, please contact Rick (RKemman@complianceservices.com), Jeff (JWirtz@complianceservices.com), David (DCampana@complianceservices.com), or Kayla (KCampasino@complianceservices.com) while at the meeting or call CSI directly (Tel: 253.473.9007).
While in attendance, please plan to attend the platform presentation by Kayla Campasino on Friday June 3 at 9:20 a.m. entitled:
- Aquatic Refugia: Relevance and Significance in Ecological Risk Assessment
Abstract: Aquatic environments may receive unintentional exposure to pesticides applied to nearby agricultural fields. Ecological risk assessment (ERA) is a necessary tool for estimating the potential for adverse effects to aquatic ecosystems and associated biota, and is a requirement of the pesticide registration process. Current exposure models utilized in aquatic ERA assume a homogenous pesticide distribution within a water body, and effects analyses are based on standardized laboratory toxicity studies. While this approach utilizes the best available data and conservative assumptions, a more realistic approach could incorporate the influence of habitat refugia on exposure and recovery of aquatic organisms to estimate risk. Habitat refugia result from spatial and/or temporal variations in pesticide concentrations within an aquatic environment, creating areas or times where organisms may experience lower exposure concentrations compared to the water body as a whole. Additionally, uneven pesticide distributions within an aquatic environment allow species to recolonize heavily affected areas from less affected areas. These spatial and temporal variations may occur due to a variety of factors, including environmental heterogeneity, physicochemical properties of compounds, and environmental fate of compounds. For example, the hydrophobic nature of pyrethroids causes these compounds to sorb to aquatic macrophytes and sediments, rapidly reducing the bioavailable concentration in the water column. This presentation will discuss these phenomena in detail, using peer reviewed literature consisting of field and mesocosm studies. Future directions regarding the inclusion of refugia into ERA will also be discussed.
CSI is proud to be an Orca Level Corporate Member and meeting sponsor for this event!
For a complete list of events that CSI will be attending in 2016, please visit our Events page.