James S. Kuwabara, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 33
Development of a mercury speciation, fate, and biotic uptake (BIOTRANSPEC) model: Application to Lahontan Reservoir (Nevada, USA) Development of a mercury speciation, fate, and biotic uptake (BIOTRANSPEC) model: Application to Lahontan Reservoir (Nevada, USA)
A mathematically linked mercury transport, speciation, kinetic, and simple biotic uptake (BIOTRANSPEC) model has been developed. An extension of the metal transport and speciation (TRANSPEC) model, BIOTRANSPEC estimates the fate and biotic uptake of inorganic (Hg(II)), elemental (Hg(0)) and organic (MeHg) forms of mercury and their species in the dissolved, colloidal (e.g., dissolved...
Authors
N. Gandhi, S.P. Bhavsar, M.L. Diamond, James S. Kuwabara, Mark C. Marvin-DePasquale, David P. Krabbenhoft
Mercury speciation in piscivorous fish from mining-impacted reservoirs Mercury speciation in piscivorous fish from mining-impacted reservoirs
Guadalupe Reservoir (GUA), California, and Lahontan Reservoir (LAH), Nevada, U.S. are both affected either directly or indirectly by the legacy of gold and silver mining in the Sierra Nevada during the nineteenth century. Analysis of total mercury in fish from these lentic systems consistently indicate elevated concentrations (>1 μg·g-1 wet weight; hereinafter, all concentrations are...
Authors
James S. Kuwabara, Yuji Arai, Brent R. Topping, I.J. Pickering, G.N. George
Biological effects of anthropogenic contaminants in the San Francisco Estuary Biological effects of anthropogenic contaminants in the San Francisco Estuary
Concentrations of many anthropogenic contaminants in the San Francisco Estuary exist at levels that have been associated with biological effects elsewhere, so there is a potential for them to cause biological effects in the Estuary. The purpose of this paper is to summarize information about biological effects on the Estuary's plankton, benthos, fish, birds, and mammals, gathered since...
Authors
B. Thompson, T. Adelsbach, Cynthia L. Brown, J. Hunt, James S. Kuwabara, J. Neale, H. Ohlendorf, Steven E. Schwarzbach, R. Spies, K. Taberski
Interactive effects of dissolved zinc and orthophosphate on phytoplankton from Coeur d'Alene Lake, Idaho Interactive effects of dissolved zinc and orthophosphate on phytoplankton from Coeur d'Alene Lake, Idaho
Within the longitudinal chemical-concentration gradient in Coeur d'Alene Lake, generated by inputs from the St. Joe and Coeur d'Alene Rivers, two dominant algal species, Chlorella minutissima and Asterionella formosa, were isolated and cultured in chemically defined media to examine growth response to a range of dissolved orthophosphate concentrations and zinc-ion activities...
Authors
James S. Kuwabara, Brent R. Topping, Paul F. Woods, James L. Carter, Stephen W. Hager
Mercury accumulation by lower trophic-level organisms in lentic systems within the Guadalupe River watershed, California Mercury accumulation by lower trophic-level organisms in lentic systems within the Guadalupe River watershed, California
The water columns of four reservoirs (Almaden, Calero, Guadalupe and Lexington Reservoirs) and an abandoned quarry pit filled by Alamitos Creek drainage for recreational purposes (Lake Almaden) were sampled on September 14 and 15, 2004 to provide the first measurements of mercury accumulation by phytoplankton and zooplankton in lentic systems (bodies of standing water, as in lakes and...
Authors
James S. Kuwabara, Brent R. Topping, Gerald E. Moon, Peter Husby, Andrew Lincoff, James L. Carter, Marie-Noële Croteau
Sediment remobilization of Mercury in South San Francisco Bay, California Sediment remobilization of Mercury in South San Francisco Bay, California
No abstract available.
Authors
Brent R. Topping, James S. Kuwabara, Mark C. Marvin-DisPasquale, Jennifer L. Agee, Le H. Kieu, John R. Flanders, Francis Parcheso, Stephen W. Hager, Cary B. Lopez, David P. Krabbenhoft
Non-USGS Publications**
Takekawa, J.Y., Ackerman, J.T., Brand, L.A., Graham, T.R., Eagles-Smith, C.A., Herzog, M.P., Topping, B.R., Shellenbarger, G.G., Kuwabara, J.S., Mruz, E., Piotter, S.L., Athearn. N.D., 2015, Unintended consequences of management actions in salt pond restoration: cascading effects in trophic interactions: Plos One: 10: e0119345. doi:10.1371/journal.pone.0119345
Topping, B.R., Kuwabara, J.S., Carter, J.L., Garrett, K.K., Mruz, E., Piotter, S., Takekawa, J.Y., 2016, Effects of salt pond restoration on benthic flux: sediment as a source of nutrients to the water column: Journal of Environmental Protection, v. 7, p. 1064-1071, DOI: 10.4236/jep.2016.77095, https://pubs.er.usgs.gov/publication/70174041.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Filter Total Items: 33
Development of a mercury speciation, fate, and biotic uptake (BIOTRANSPEC) model: Application to Lahontan Reservoir (Nevada, USA) Development of a mercury speciation, fate, and biotic uptake (BIOTRANSPEC) model: Application to Lahontan Reservoir (Nevada, USA)
A mathematically linked mercury transport, speciation, kinetic, and simple biotic uptake (BIOTRANSPEC) model has been developed. An extension of the metal transport and speciation (TRANSPEC) model, BIOTRANSPEC estimates the fate and biotic uptake of inorganic (Hg(II)), elemental (Hg(0)) and organic (MeHg) forms of mercury and their species in the dissolved, colloidal (e.g., dissolved...
Authors
N. Gandhi, S.P. Bhavsar, M.L. Diamond, James S. Kuwabara, Mark C. Marvin-DePasquale, David P. Krabbenhoft
Mercury speciation in piscivorous fish from mining-impacted reservoirs Mercury speciation in piscivorous fish from mining-impacted reservoirs
Guadalupe Reservoir (GUA), California, and Lahontan Reservoir (LAH), Nevada, U.S. are both affected either directly or indirectly by the legacy of gold and silver mining in the Sierra Nevada during the nineteenth century. Analysis of total mercury in fish from these lentic systems consistently indicate elevated concentrations (>1 μg·g-1 wet weight; hereinafter, all concentrations are...
Authors
James S. Kuwabara, Yuji Arai, Brent R. Topping, I.J. Pickering, G.N. George
Biological effects of anthropogenic contaminants in the San Francisco Estuary Biological effects of anthropogenic contaminants in the San Francisco Estuary
Concentrations of many anthropogenic contaminants in the San Francisco Estuary exist at levels that have been associated with biological effects elsewhere, so there is a potential for them to cause biological effects in the Estuary. The purpose of this paper is to summarize information about biological effects on the Estuary's plankton, benthos, fish, birds, and mammals, gathered since...
Authors
B. Thompson, T. Adelsbach, Cynthia L. Brown, J. Hunt, James S. Kuwabara, J. Neale, H. Ohlendorf, Steven E. Schwarzbach, R. Spies, K. Taberski
Interactive effects of dissolved zinc and orthophosphate on phytoplankton from Coeur d'Alene Lake, Idaho Interactive effects of dissolved zinc and orthophosphate on phytoplankton from Coeur d'Alene Lake, Idaho
Within the longitudinal chemical-concentration gradient in Coeur d'Alene Lake, generated by inputs from the St. Joe and Coeur d'Alene Rivers, two dominant algal species, Chlorella minutissima and Asterionella formosa, were isolated and cultured in chemically defined media to examine growth response to a range of dissolved orthophosphate concentrations and zinc-ion activities...
Authors
James S. Kuwabara, Brent R. Topping, Paul F. Woods, James L. Carter, Stephen W. Hager
Mercury accumulation by lower trophic-level organisms in lentic systems within the Guadalupe River watershed, California Mercury accumulation by lower trophic-level organisms in lentic systems within the Guadalupe River watershed, California
The water columns of four reservoirs (Almaden, Calero, Guadalupe and Lexington Reservoirs) and an abandoned quarry pit filled by Alamitos Creek drainage for recreational purposes (Lake Almaden) were sampled on September 14 and 15, 2004 to provide the first measurements of mercury accumulation by phytoplankton and zooplankton in lentic systems (bodies of standing water, as in lakes and...
Authors
James S. Kuwabara, Brent R. Topping, Gerald E. Moon, Peter Husby, Andrew Lincoff, James L. Carter, Marie-Noële Croteau
Sediment remobilization of Mercury in South San Francisco Bay, California Sediment remobilization of Mercury in South San Francisco Bay, California
No abstract available.
Authors
Brent R. Topping, James S. Kuwabara, Mark C. Marvin-DisPasquale, Jennifer L. Agee, Le H. Kieu, John R. Flanders, Francis Parcheso, Stephen W. Hager, Cary B. Lopez, David P. Krabbenhoft
Non-USGS Publications**
Takekawa, J.Y., Ackerman, J.T., Brand, L.A., Graham, T.R., Eagles-Smith, C.A., Herzog, M.P., Topping, B.R., Shellenbarger, G.G., Kuwabara, J.S., Mruz, E., Piotter, S.L., Athearn. N.D., 2015, Unintended consequences of management actions in salt pond restoration: cascading effects in trophic interactions: Plos One: 10: e0119345. doi:10.1371/journal.pone.0119345
Topping, B.R., Kuwabara, J.S., Carter, J.L., Garrett, K.K., Mruz, E., Piotter, S., Takekawa, J.Y., 2016, Effects of salt pond restoration on benthic flux: sediment as a source of nutrients to the water column: Journal of Environmental Protection, v. 7, p. 1064-1071, DOI: 10.4236/jep.2016.77095, https://pubs.er.usgs.gov/publication/70174041.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.