Exploring Biophysical Linkages between Coastal Forestry Management Practices and Aquatic Bivalve Contaminant Exposure
Open Access
- 2 March 2021
- Vol. 9 (3), 46
- https://doi.org/10.3390/toxics9030046
Abstract
Terrestrial land use activities present cross-ecosystem threats to riverine and marine species and processes. Specifically, pesticide runoff can disrupt hormonal, reproductive, and developmental processes in aquatic organisms, yet non-point source pollution is difficult to trace and quantify. In Oregon, U.S.A., state and federal forestry pesticide regulations, designed to meet regulatory water quality requirements, differ in buffer size and pesticide applications. We deployed passive water samplers and collected riverine and estuarine bivalves Margaritifera falcata, Mya arenaria, and Crassostrea gigas from Oregon Coast watersheds to examine forestry-specific pesticide contamination. We used non-metric multidimensional scaling and regression to relate concentrations and types of pesticide contamination across watersheds to ownership and management metrics. In bivalve samples collected from eight coastal watersheds, we measured twelve unique pesticides (two herbicides; three fungicides; and seven insecticides). Pesticides were detected in 38% of bivalve samples; and frequency and maximum concentrations varied by season, species, and watershed with indaziflam (herbicide) the only current-use forestry pesticide detected. Using passive water samplers, we measured four current-use herbicides corresponding with planned herbicide applications; hexazinone and atrazine were most frequently detected. Details about types and levels of exposure provide insight into effectiveness of current forest management practices in controlling transport of forest-use pesticides.Funding Information
- Oregon Sea Grant, Oregon State University (NB325E-B)
This publication has 55 references indexed in Scilit:
- Effect of low dose exposure to the herbicide atrazine and its metabolite on cytochrome P450 aromatase and steroidogenic factor-1 mRNA levels in the brain of premetamorphic bullfrog tadpoles (Rana catesbeiana)Aquatic Toxicology, 2011
- Impacts of stage-specific acute pesticide exposure on predicted population structure of the soft-shell clam, Mya arenariaAquatic Toxicology, 2010
- The Synergistic Toxicity of Pesticide Mixtures: Implications for Risk Assessment and the Conservation of Endangered Pacific SalmonEnvironmental Health Perspectives, 2009
- Unidentified Inert Ingredients in Pesticides: Implications for Human and Environmental HealthEnvironmental Health Perspectives, 2006
- The Northwest Forest Plan: Origins, Components, Implementation Experience, and Suggestions for ChangeConservation Biology, 2006
- Integrated coastal reserve planning: making the land–sea connectionFrontiers in Ecology and the Environment, 2005
- Molecular identification and expression study of differentially regulated genes in the Pacific oyster Crassostrea gigas in response to pesticide exposureThe FEBS Journal, 2004
- Cumulative effects of forestry practices: An example framework for evaluation from Oregon, U.S.A.Biomass and Bioenergy, 1997
- Trophic-Level Differences in the Bioconcentration of Chemicals: Implications in Assessing Environmental BiomagnificationEnvironmental Science & Technology, 1995
- The Role of the Zebra Mussel, Dreissena polymorpha, in Contaminant Cycling: I. The Effect of Body Size and Lipid Content on the Bioconcentration of PCBs and PAHsJournal of Great Lakes Research, 1994