caa a22 4500 467903956 CHVBK 20180406152828.0 cr unu---uuuuu 170328e20061001xx s 000 0 eng 10.1007/s10661-005-9118-0 doi (NATIONALLICENCE)springer-10.1007/s10661-005-9118-0 Spatial Relationships Between Water Quality and Pesticide Application Rates in Agricultural Watersheds [Elektronische Daten] [John Hunt, Brian Anderson, Bryn Phillips, Ron Tjeerdema, Nancy Richard, Val Connor, Karen Worcester, Mark Angelo, Amanda Bern, Brian Fulfrost, Dustin Mulvaney] Pesticide applications to agricultural lands in California, USA, are reported to a central data base, while data on water and sediment quality are collected by a number of monitoring programs. Data from both sources are geo-referenced, allowing spatial analysis of relationships between pesticide application rates and the chemical and biological condition of water bodies. This study collected data from 12 watersheds, selected to represent a range of pesticide usage. Water quality parameters were measured during six surveys of stream sites receiving runoff from the selected watershed areas. This study had three objectives: to evaluate the usefulness of pesticide application data in selecting regional monitoring sites, to provide information for generating and testing hypotheses about pesticide fate and effects, and to determine whether in-stream nitrate concentration was a useful surrogate indicator for regional monitoring of toxic substances. Significant correlations were observed between pesticide application rates and in-stream pesticide concentrations (p < 0.05) and toxicity (p < 0.10). In-stream nitrate concentrations were not significantly correlated with either the amount of pesticides applied, in-stream pesticide concentrations, or in-stream toxicity (all p > 0.30). Neither total watershed area nor the area in which pesticide usage was reported correlated significantly with the amount of pesticides applied, in-stream pesticide concentrations, or in-stream toxicity (all p > 0.14). In-stream pesticide concentrations and effects were more closely related to the intensity of pesticide use than to the area under cultivation. Springer Science+Business Media, Inc., 2005 land use nationallicence pesticide use reports nationallicence diazinon nationallicence chlorpyrifos nationallicence pyrethroid nationallicence toxicity nationallicence Ceriodaphnia dubia nationallicence Hyalella azteca nationallicence GIS nationallicence watershed nationallicence Hunt John Department of Environmental Toxicology, Marine Pollution Studies Laboratory at Granite Canyon, University of California, Davis, 34500 Highway 1, 93940, Monterey, CA, USA aut Anderson Brian Department of Environmental Toxicology, Marine Pollution Studies Laboratory at Granite Canyon, University of California, Davis, 34500 Highway 1, 93940, Monterey, CA, USA aut Phillips Bryn Department of Environmental Toxicology, Marine Pollution Studies Laboratory at Granite Canyon, University of California, Davis, 34500 Highway 1, 93940, Monterey, CA, USA aut Tjeerdema Ron Department of Environmental Toxicology, Marine Pollution Studies Laboratory at Granite Canyon, University of California, Davis, 34500 Highway 1, 93940, Monterey, CA, USA aut Richard Nancy California State Water Resources Control Board, 1001 I Street, 95814, Sacramento, CA, USA aut Connor Val California State Water Resources Control Board, 1001 I Street, 95814, Sacramento, CA, USA aut Worcester Karen California Regional Water Quality Control Board, Central Coast Region, 895 Aerovista Place, Suite 101, 93401, San Luis Obispo, CA, USA aut Angelo Mark California Regional Water Quality Control Board, Central Coast Region, 895 Aerovista Place, Suite 101, 93401, San Luis Obispo, CA, USA aut Bern Amanda California Regional Water Quality Control Board, Central Coast Region, 895 Aerovista Place, Suite 101, 93401, San Luis Obispo, CA, USA aut Fulfrost Brian Department of Environmental Studies, University of California, Santa Cruz, GIS Technology Laboratory, 1156 High Street, 95064, Santa Cruz, CA, USA aut Mulvaney Dustin Department of Environmental Studies, University of California, Santa Cruz, GIS Technology Laboratory, 1156 High Street, 95064, Santa Cruz, CA, USA aut Environmental Monitoring and Assessment Springer Netherlands 121/1-3(2006-10-01), 245-262 0167-6369 121:1-3<245 2006 121 10661 https://doi.org/10.1007/s10661-005-9118-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10661-005-9118-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hunt John Department of Environmental Toxicology, Marine Pollution Studies Laboratory at Granite Canyon, University of California, Davis, 34500 Highway 1, 93940, Monterey, CA, USA aut NATIONALLICENCE 700 1- Anderson Brian Department of Environmental Toxicology, Marine Pollution Studies Laboratory at Granite Canyon, University of California, Davis, 34500 Highway 1, 93940, Monterey, CA, USA aut NATIONALLICENCE 700 1- Phillips Bryn Department of Environmental Toxicology, Marine Pollution Studies Laboratory at Granite Canyon, University of California, Davis, 34500 Highway 1, 93940, Monterey, CA, USA aut NATIONALLICENCE 700 1- Tjeerdema Ron Department of Environmental Toxicology, Marine Pollution Studies Laboratory at Granite Canyon, University of California, Davis, 34500 Highway 1, 93940, Monterey, CA, USA aut NATIONALLICENCE 700 1- Richard Nancy California State Water Resources Control Board, 1001 I Street, 95814, Sacramento, CA, USA aut NATIONALLICENCE 700 1- Connor Val California State Water Resources Control Board, 1001 I Street, 95814, Sacramento, CA, USA aut NATIONALLICENCE 700 1- Worcester Karen California Regional Water Quality Control Board, Central Coast Region, 895 Aerovista Place, Suite 101, 93401, San Luis Obispo, CA, USA aut NATIONALLICENCE 700 1- Angelo Mark California Regional Water Quality Control Board, Central Coast Region, 895 Aerovista Place, Suite 101, 93401, San Luis Obispo, CA, USA aut NATIONALLICENCE 700 1- Bern Amanda California Regional Water Quality Control Board, Central Coast Region, 895 Aerovista Place, Suite 101, 93401, San Luis Obispo, CA, USA aut NATIONALLICENCE 700 1- Fulfrost Brian Department of Environmental Studies, University of California, Santa Cruz, GIS Technology Laboratory, 1156 High Street, 95064, Santa Cruz, CA, USA aut NATIONALLICENCE 700 1- Mulvaney Dustin Department of Environmental Studies, University of California, Santa Cruz, GIS Technology Laboratory, 1156 High Street, 95064, Santa Cruz, CA, USA aut NATIONALLICENCE 773 0- Environmental Monitoring and Assessment Springer Netherlands 121/1-3(2006-10-01), 245-262 0167-6369 121:1-3<245 2006 121 10661 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer