Analysis of the herbicide diuron, three diuron degradates, and six neonicotinoid insecticides in water-Method details and application to two Georgia streams

Hladik, Michelle L.; Calhoun, Daniel L.

doi:10.3133/sir20125206

Cited by 41 publications

(62 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Six neonicotinoids, diuron and three diuron degradates were measured in the water samples using a previously published method (Hladik and Calhoun, 2012). Briefly, a 1-L water sample was extracted onto an Oasis HLB SPE cartridge and eluted with 10 mL of 50:50 DCM: acetone.…”

Section: Surface Water Samples For Pesticides and Nutrientsmentioning

confidence: 99%

See 1 more Smart Citation

Pesticide concentrations in frog tissue and wetland habitats in a landscape dominated by agriculture

Smalling

Reeves

Muths

et al. 2015

Science of The Total Environment

124

View full text Add to dashboard Cite

Habitat loss and exposure to pesticides are likely primary factors contributing to amphibian decline in agricultural landscapes. Conservation efforts have attempted to restore wetlands lost through landscape modifications to reduce contaminant loads in surface waters and providing quality habitat to wildlife. The benefits of this increased wetland area, perhaps especially for amphibians, may be negated if habitat quality is insufficient to support persistent populations. We examined the presence of pesticides and nutrients in water and sediment as indicators of habitat quality and assessed the bioaccumulation of pesticides in the tissue of twonative amphibian species Pseudacris maculata (chorus frogs) and Lithobates pipiens (leopard frogs) at six wetlands (3 restored and 3 reference) in Iowa, USA. Restored wetlands are positioned on the landscape to receive subsurface tile drainage water while referencewetlands receive water fromoverland run-off and shallow groundwater sources. Concentrations of the pesticides frequently detected inwater and sediment samples were not different between wetland types. The median concentration of atrazine in surface water was 0.2 μg/ L. Reproductive abnormalities in leopard frogs have been observed in other studies at these concentrations. Nutrient concentrations were higher in the restored wetlands but lower than concentrations thought lethal to frogs. Complex mixtures of pesticides including up to 8 fungicides, some previously unreported in tissue, were detected with concentrations ranging from 0.08 to 1500 μg/kg wet weight. No significant differences in pesticide concentrations were observed between species, although concentrations tended to be higher in leopard frogs compared to chorus frogs, possibly because of differences in life histories. Our results provide information on habitat quality in restored wetlands that will assist state and federal agencies, landowners, and resource managers in identifying and implementing conservation and management actions for these and similar wetlands in agriculturally dominated landscapes. RightsWorks produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted. H I G H L I G H T S• Habitat quality was similar between restored and reference wetlands in Iowa.• Complex mixtures of pesticides are detected in frog tissues (liver and whole body).• The number of fungicides (up to 8) in frog tissues is largest reported to date.• Life history has the potential to impact pesticide bioaccumulation in frogs. Habitat loss and exposure to pesticides are likely primary factors contributing to amphibian decline in agricultural landscapes. Conservation efforts have attempted to restore wetlands lost through landscape modifications to reduce contaminant loads in surface waters and providing quality habitat to wildlife. The benefits of this increased wetland area, perhaps especially for amphibians, may be negated if habitat quality is insufficient t...

show abstract

Section: Surface Water Samples For Pesticides and Nutrientsmentioning

confidence: 99%

“…The MS/MS was operated under electrospray ionization (ESI) in positive mode, data were collected in multiple reaction monitoring (MRM) modes. The MDLs ranged from 0.003 to 0.006 μg/L (Hladik and Calhoun, 2012).…”

Section: Surface Water Samples For Pesticides and Nutrientsmentioning

confidence: 99%

Pesticide concentrations in frog tissue and wetland habitats in a landscape dominated by agriculture

Smalling

Reeves

Muths

et al. 2015

Science of The Total Environment

124

View full text Add to dashboard Cite

show abstract

“…Method detection limits (MDLs) for surface-water samples were validated in previous studies (Hladik and others, 2008;Hladik and Calhoun, 2012) by using the procedure described in 40 CFR Part 136 Appendix B (U.S. Environmental Protection Agency, 1992). Water samples used to determine MDLs for insecticides and herbicides analyzed by GC/MS were collected in 2005 from the Sacramento River at Miller Park, and water samples used to determine fungicide MDLs were collected in 2008 from the American River near the California State University, Sacramento, campus.…”

Section: Methods Detection Limitsmentioning

confidence: 99%

“…Data were collected in the multiple-reaction-monitoring mode. Additional details of the LC/MS/MS analytical method can be found in Hladik and Calhoun (2012).…”

Section: Lc/ms/ms Analysismentioning

confidence: 99%

Dissolved pesticide concentrations in the Sacramento-San Joaquin Delta and Grizzly Bay, California, 2011-12

Orlando¹,

McWayne²,

Sanders³

et al. 2013

Data Series

Self Cite

View full text Add to dashboard Cite

For more information on the USGS-the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment, visit http://www.usgs.gov or call 1-888-ASK-USGS.For an overview of USGS information products, including maps, imagery, and publications, visit http://www.usgs.gov/pubprodTo order this and other USGS information products, visit http://store.usgs.gov Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.Although this information product, for the most part, is in the public domain, it also may contain copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner. AbstractSurface-water samples were collected from sites within the Sacramento-San Joaquin Delta and Grizzly Bay, California, during the spring in 2011 and 2012, and they were analyzed by the U.S. Geological Survey for a suite of 99 current-use pesticides and pesticide degradates. Samples were collected and analyzed as part of a collaborative project studying the occurrence and characteristics of phytoplankton in the San Francisco Estuary. Samples were analyzed by two separate laboratory methods employing gas chromatography/ mass spectrometry or liquid chromatography with tandem mass spectrometry. Method detection limits ranged from 0.9 to 10.5 nanograms per liter (ng/L). Eighteen pesticides were detected in samples collected during 2011, and the most frequently detected compounds were the herbicides clomazone, diuron, hexazinone and metolachlor, and the diuron degradates 3, . Concentrations for all compounds were less than 75 ng/L, except for the rice herbicide clomazone and the fungicide tetraconazole, which had maximum concentrations of 535 and 511 ng/L, respectively. In samples collected in 2012, a total of 16 pesticides were detected. The most frequently detected compounds were the fungicides azoxystrobin and boscalid and the herbicides diuron, hexazinone, metolachlor, and simazine. Maximum concentrations for all compounds detected in 2012 were less than 75 ng/L, except for the fungicide azoxystrobin and the herbicides hexazinone and simazine, which were detected at up to 188, 134, and 140 ng/L, respectively.

show abstract

“…Samples were analyzed for 124 current-use pesticides (CUPs) using a gas chromatograph/mass spectrometer (GC/MS) following the method described in Hladik and others (2008). Water samples were also analyzed for an additional 25 CUPs using liquid chromatography tandem mass spectrometry (LC/MS/MS) following the method described in Hladik and Calhoun (2012). Suspended sediments filtered from the water samples were analyzed for 124 CUPs using GC/MS following the method described in Hladik and McWayne (2012).…”

Section: Pesticidesmentioning

confidence: 99%

Factors affecting marsh vegetation at the Liberty Island Conservation Bank in the Cache Slough region of the Sacramento–San Joaquin Delta, California

Orlando¹,

Drexler²

2017

Open-File Report

View full text Add to dashboard Cite

For more information on the USGS-the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment-visit http://www.usgs.gov or call 1-888-ASK-USGS.For an overview of USGS information products, including maps, imagery, and publications, visit http://www.usgs.gov/pubprod/.Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.Although this information product, for the most part, is in the public domain, it also may contain copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner. Temperature in degrees Celsius (°C) may be converted to degrees Fahrenheit (°F) as follows:°F = (1.8 × °C) + 32. DatumVertical coordinate information is referenced to the North American Vertical Datum of 1988 (NAVD 88).Horizontal coordinate information is referenced to the North American Datum of 1983 (NAD 83). Supplemental InformationSpecific conductance is given in microsiemens per centimeter at 25 degrees Celsius (µS/cm at 25 °C).Concentrations of chemical constituents in water are given in either milligrams per liter (mg/L) or nanograms per liter (ng/L). AbstractThe Liberty Island Conservation Bank (LICB) is a tidal freshwater marsh restored for the purpose of mitigating adverse effects on sensitive fish populations elsewhere in the region. The LICB was completed in 2012 and is in the northern Cache Slough region of the Sacramento-San Joaquin Delta. The wetland vegetation at the LICB is stunted and yellow-green in color (chlorotic) compared to nearby wetlands. A study was done to investigate three potential causes of the stunted and chlorotic vegetation: (1) improper grading of the marsh plain, (2) pesticide contamination from agricultural and urban inputs upstream from the site, (3) nitrogen-deficient soil, or some combination of these. Water samples were collected from channels at five sites, and soil samples were collected from four wetlands, including the LICB, during the summer of 2015. Real-time kinematic global positioning system (RTK-GPS) elevation surveys were completed at the LICB and north Little Holland Tract, a closely situated natural marsh that has similar hydrodynamics as the LICB, but contains healthy marsh vegetation.The results showed no significant differences in carbon or nitrogen content in the surface soils or in pesticides in water among the sites. The elevation survey indicated that the mean elevation of the LICB was about 26 centimeters higher than that of the north Little Holland Tract marsh. Because marsh plain elevation largely determines the hydroperiod of a marsh, these results indicated that the LICB has a hydroperiod that differs from that of neighboring north Little Holland Tract marsh. This difference in hydroperiod contributed to the lower stature and decreased vigor of wetland vegetation at the LICB. Although the LICB cannot be regraded without great expense, it could be possible to reduce the sharp an...

show abstract

Analysis of the herbicide diuron, three diuron degradates, and six neonicotinoid insecticides in water-Method details and application to two Georgia streams

Cited by 41 publications

References 9 publications

Pesticide concentrations in frog tissue and wetland habitats in a landscape dominated by agriculture

Pesticide concentrations in frog tissue and wetland habitats in a landscape dominated by agriculture

Dissolved pesticide concentrations in the Sacramento-San Joaquin Delta and Grizzly Bay, California, 2011-12

Factors affecting marsh vegetation at the Liberty Island Conservation Bank in the Cache Slough region of the Sacramento–San Joaquin Delta, California

Contact Info

Product

Resources

About