Assessment of risk reduction strategies for the management of agricultural nonpoint source pesticide runoff in estuarine ecosystems

Abstract

Agricultural nonpoint source (NPS) runoff may result in significant discharges of pesticides, suspended sediments, and fertilizers into estuarine habitats adjacent to agricultural areas or downstream from agricultural watersheds. Exposure of estuarine fin fish and shellfish to toxic levels of pesticides may occur, resulting in significant declines in field populations. Integrated pest management (IPM), best management practices (BMP), and retention ponds (RP) are risk management tools that have been proposed to reduce the contaminant risk from agricultural NPS runoff into estuarine ecosystems. Field studies were conducted at three sites within coastal estuarine ecosystems of South Carolina (SC) from 1985 to 1990 that varied in terms of the amount and degree of risk reduction strategies employed. An intensively managed (IPM, BMP, and RP) agricultural treatment site (TRT) was studied for pesticide runoff impacts. From 1985 to 1987, there were minimal (some IPM and BMP) management activities at TRT, but from 1988 to 1990, TRT was managed using an intensive risk reduction strategy. A second unmanaged agricultural growing area, Kiawah (KWA), was also studied and compared with TRT in terms of pesticide runoff and the resulting impacts on grass shrimp (Palaemonetes pugio) and mummichogs (Fundulus heteroclitus). A third, non-agricultural, reference site (CTL) was used for comparing results from the managed and unmanaged agricultural sites. In situ toxicity tests and field samples of the grass shrimp populations were conducted at each site and compared in terms of survival and the effectiveness of current risk reduction strategies. Significant runoff of insecticides (azinphosmethyl, endosulfan, and fenvalerate) along with several fish kills were observed at TRT prior to the implementation of rigorous risk reduction methods. A significant reduction of in stream pesticide concentrations (up to 90%) was observed at TRT following the implementation of strict NPS runoff controls, which greatly reduced impacts on estuarine fish and shellfish. At the unmanaged KWA, continued impacts due to the runoff of these insecticides were observed, along with several fish kills. Additional monitoring indicated that gravid female grass shrimp populations from KWA had elevated levels of P-glycoprotein (P-gp), a multidrug resistance protein, which may transport various pesticides across cellular membranes. Comparison of field results with laboratory toxicity tests established that pesticide exposure was the primary cause of observed field impacts at each site. These findings clearly indicate the value of an integrated risk reduction strategy (BMP, IPM, and RP) for minimizing impacts from NPS agricultural pesticide runoff.

Keywords

azinphosmethyl best management practices endosulfan fenvalerate grass shrimp integrated pest management mummichog P-glycoprotein retention ponds

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References

Bain, L. J. and LeBlanc, G. A. (1996). “Interaction of structurally diverse pesticides with human MDR1 gene product P-glycoprotein.” Toxicol. Appl. Pharmacol. 141:288-298.

Baughman, D. S. , Moore, D. W. , and Scott, G. I. (1989). “A comparison and evaluation of field and laboratory toxicity tests with fenvalerate on an estuarine crustacean.” Environ. Toxicol. Chem. 8:417-429.

Bearden, C. M. (1982). Unpublished Fish Kill Report. SC Wildlife and Marine Resources, Charleston, SC.

Clement, C. and Colborn, T. (1992). “Herbicides and fungicides: a perspective on potential human exposure.” In: Chemically-Induced Alterations in Sexual and Functional Development: The Wildlife/Human Connection ( T. Colborn and C. Clement , eds.). Princeton Scientific Publishing, Princeton, NJ. pp. 347-359.

DeLorenzo, M. E. , Lauth, J. , Pennington, P. L. , Scott, G. I. , and Ross, P. E. (1999). “Atrazine effects on the microbial food web in tidal creek mesocosms.” Aquat. Toxicol. (in press).

Finley, D. B. , Scott, G. I. , Daugomah, J. W. , Leyman, S. L. , Reed, L. A. , Sanders, M. , Sivertsen, S. K. , and Strozier, E. D. (1999). “An ecotoxicological assessment of urban and agricultural nonpoint source runoff effects on the grass shrimp, Palaemonetes pugio.” In: Ecological Risk Assessment for Wetlands ( M. A. Lewis , R. L. Powell , M. K. Nelson , M. G. Henry , S. J. Klaine , G. W. Dickson , and F. L. Mayer , eds.). SETAC Press, Pensacola, FL (in press).

Fulton, M. H. , Chandler, G. T. , and Scott, G. I. (1996). “Urbanization effects on the fauna of a Southeastern USA bar-built estuary.” In: Sustainable Development in the Southeastern Coastal Zone ( F. J. Vernberg , W. B. Vernberg , T. Siewicki , eds.). University of South Carolina Press, Columbia, SC. pp. 477-504.

Hamilton, M. , Russo, R. , and Thurston, R. (1977). “Trimmed Spearman-Karber method for estimating median lethal concentrations in toxicity bioassays.” Environ. Sci. Technol. 11:714-719.

Harder, H. W. , Carter, T. V. , and Bidleman, T. F. (1983). “Acute effects of toxaphene and its sediment-degraded products on estuarine fish.” Can. J. Fish Aquat. Sci. 40(12): 2119-2125.

10.

Humenik, F. J. , Smolen, M. D. , and Dressing, S. A. (1987). “Pollution from nonpoint sources. Where are we and where are we going?” Environ. Sci. Technol. 21:737-742.

11.

Key, P.B. (1995). “The lethal and sublethal effects of malathion, azinphosmethyl, and chlorpyrifos exposure on the grass shrimp Palaemonetes pugio, with an emphasis on larval life cycle pulse exposures.” Dissertation. University of South Carolina.

12.

Lipsey, R. L. (1981). Florida Statewide Pesticide Usage Survey. Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL.

13.

Lowe, J. , Farrow, D. , Pait, A. , Arenstam, S. , and Lavan, E. (1991). Fish Kills in Coastal Waters, 1980-1989. Strategic Environmental Assessment Division, ORCA/NOS/NOAA, Rockville, MD.

14.

Mayer, F. L., Jr. (1987). Acute Toxicity Testing Handbook of Chemicals to Estuarine Organisms (Report No. 600/8-87/017). US EPA/GBERL, Gulf Breeze, FL.

15.

McCall, E. P. , Scott, G. I. , and Hurley, J. M. (1987). Impacts of Plasticulture on Estuarine Water Quality (Tech Report No. G1251-07). US Geological Survey, Reston VA.

16.

Moore, D.W. (1988). “An integrated laboratory and field study of nonpoint source agricultural insecticide runoff and its effect on the grass shrimp, Palaemonetes pugio (Holthius).” Dissertation. University of South Carolina.

17.

Pait, A. S. , Farrow, D. R. , Lowe, J. A. , and Pacheco, P. A. (1989). Agricultural Pesticide Use in Estuarine Drainage Areas: A Preliminary Summary for Selected Pesticides. Ocean Assessments Division, NOS/NOAA, Rockville, MD.

18.

Pait, A. S. , DeSouza, A. , and Farrow, D. (1992). Agricultural Pesticides in Coastal Areas: A National Summary. Strategic Environmental Assessments Division, ORCA/NOS/NOAA, Rockville, MD.

19.

Ross, P. , Scott, G. I. , Fulton, M. H. , and Strozier, E. D. (1996). “Immunoassays for rapid, inexpensive monitoring of agricultural chemicals.” In: Environmental Xenobiotics ( M. Richardson , ed.). Taylor and Francis, London, UK. pp. 345-367.

20.

Schimmel, S. , Garnas, R. , Patrick, J. , and Moore, D. (1983). “Acute toxicity, bioconcentration and persistence of AC 222,705, benthiocarb, chlorpyrifos, fenvalerate, methyl parathion and permethrin in the estuarine environment.” J. Agric. Food Chem. 31:1004-1113.

21.

Schinkel, A. H. , Smit, J. J. M. , Van Tellingen, O. , Beijnen, J. H. , Wagenaar, E. , Van Deemter, L. , Mol, C. A. A. M. , Van der Valk, M. A. , Robanus-Maandag, E. C. , Te Riele, H. P. J. , Burns, A. J. M. , and Borst, P. (1994). “Disruption of the mouse mdrla P-glycoprotein gene leads to a deficiency in the blood-brain barrier and increased sensitivity to drugs.” Cell 77:491-502.

22.

Scott, G. I. , Baughman, D. S. , Trim, A. H. , and Dee, J. (1987). “Lethal and sublethal effects of insecticides commonly found in nonpoint source agricultural runoff to estuarine fish and shellfish.” In: Physiology and Pollution of Estuarine Organisms ( W. B. Vernberg , F. Thurberg , A. Calabrese , and F. Vernberg , eds.). University of South Carolina Press, Columbia, SC. pp. 251-273.

23.

Scott, G. I. , Fulton, M. H. , Moore, D. W. , Chandler, G. T. , Key, P. B. , Hampton, T. W. , Marcus, J. M. , Jackson, K. L. , Baughman, D. S. , Trim, A. H. , Williams, L. , Louden, C. J. , and Patterson, E. R. (1990). Agricultural Insecticide Runoff Effects on Estuarine Organisms: Correlating Laboratory and Field Toxicity Testing With Ecotoxicological Biomonitoring (Final Report). US EPA, Gulf Breeze Environmental Research Laboratory, Gulf Breeze, FL.

24.

Scott, G. I. , Fulton, M. H. , Crosby, M. , Key, P. B. , Daugomah, J. W. , Waldren, J. , Strozier, E. , Louden, C. , Chandler, G. T. , Bidleman, T. , Jackson, K. , Hampton, T. , Huffman, T. , Schulz, A. , and Bradford, M. (1992). Agricultural Insecticide Runoff Effects on Estuarine Organisms: Correlating Laboratory and Field Toxicity Test, Ecophysiology Bioassays and Ecotoxicological Biomonitoring (Final Report). US EPA, Gulf Breeze, FL.

25.

Toomey, B. H. and Epel, D. (1993). “Multixenobiotic resistance in Urechis caupo embryos: protection from environmental toxins.” Biol. Bull. 185:355-364.

26.

Trim, A. H. (1987). “The acute toxicity of emulsifiable concentrates of three insecticides commonly found in nonpoint source agricultural runoff on the mummichog, Fundulus heteroclitus.” Bull. Environ. Contam. Toxicol. 38:681-686.

27.

Trim, A. H. and Marcus, J. M. (1990). “Integration of long-term fish kill data with ambient water quality monitoring data and application to water quality management.” Environ. Manage. 14:389-396.

28.

Tyler-Schroeder, D. (1978). Bioassay Procedures for the Ocean Disposal Permit Program (EPA/600/9-78-010). US EPA, Gulf Breeze, FL.

29.

US Environmental Protection Agency (EPA) (1980). Methods for the Analysis of Pesticides in Tissue, Sediments and Water (Report No. EPA-600/8-80-038). Washington, DC.

30.

US National Oceanic and Atmospheric Administration (NOAA) (1988). Report to Congress on Ocean Pollution, Monitoring, and Research. National Ocean Service, Washington, DC.

31.

US National Oceanic and Atmospheric Administration (NOAA) (1990). Earth is a Aarine Habitat: Habitat Conservation Program. National Marine Fisheries Service, Washington, DC.

32.

Wauchope, R. D. (1978). “The pesticide content of surface water draining from agricultural fields: a review.” J. Environ. Qual. 7:459-472.

33.

Weber, J. B. , Shea, P. J. , and Strek, H. J. (1980). “An evaluation of nonpoint sources of pesticide pollution in runoff.” In: Environmental Impact of Nonpoint Source Pollution ( M. Overcash and J. Davidson , eds.). Ann Arbor Science Publishers, Ann Arbor, MI. pp. 69-98.

34.

Willis, G. H. and McDowell, L. L. (1982). “Review: pesticides in agricultural runoff and their effects on downstream water quality.” Environ. Toxicol. Chem. 1:267-270.