Zobrazeno 1 - 10
of 27
pro vyhledávání: '"Theodore W. Valenti"'
Autor:
Theodore W Valenti, Shanique Grant, David A. Dreier, Sara I. Rodney, Dwayne R. J. Moore, Richard A. Brain, Wenlin Chen
Publikováno v:
Integrated Environmental Assessment and Management
Risk curves describe the relationship between cumulative probability and magnitude of effect and thus express far more information than risk quotients. However, their adoption has remained limited in ecological risk assessment. Therefore, we develope
Autor:
Danésha S. Carley, Theodore W Valenti, Steven L. Levine, Jeffrey M. Giddings, Laura L. McConnell, George P. Cobb
Publikováno v:
Integrated Environmental Assessment and Management
Pesticide regulation requires regulatory authorities to assess the potential ecological risk of pesticides submitted for registration, and most risk assessment schemes use a tiered testing and assessment approach. Standardized ecotoxicity tests, envi
Autor:
George M. Gable, Natalie C. Hewitt, James P. Grover, Theodore W. Valenti, Krista N. Prosser, Natanya J. Hayden, Bryan W. Brooks, Daniel L. Roelke, Michael T. Neisch, George D. Umphres
Publikováno v:
Water Research. 47:4274-4285
Prymnesium parvum is a haptophyte alga that forms toxic, fish-killing blooms in a variety of brackish coastal and inland waters. Its abundance and toxicity are suppressed by ammonium additions in laboratory cultures and aquaculture ponds. In a cove o
Autor:
George M. Gable, Theodore W. Valenti, James P. Grover, Bryan W. Brooks, Krista N. Prosser, Natanya J. Hayden, Michael T. Neisch, Natalie C. Hewitt, George D. Umphres, Daniel L. Roelke
Publikováno v:
Harmful Algae. 20:156-164
Harmful blooms of Prymnesium parvum in inland waters continue to expand, in part, due to anthropogenic influences and climate change. Several studies have identified the importance of elevated pH on increasing ambient toxicity associated with P. parv
Autor:
George M. Gable, Michael T. Neisch, Natanya J. Hayden, Natalie C. Hewitt, Krista N. Prosser, James P. Grover, Daniel L. Roelke, Bryan W. Brooks, Theodore W. Valenti, George D. Umphres
Publikováno v:
Harmful Algae. 20:42-57
Inflows are linked to water quality, food web dynamics, and the incidence of harmful algal blooms (HABs). It may be that inflows can be manipulated to mitigate some blooms and accelerate recovery of living natural resources, such as fisheries. Lack o
Publikováno v:
Freshwater Science. 31:928-944
Fish-mediated nutrient recycling influences nutrient dynamics in stream ecosystems, but its consequences for smaller-scale microbial processes in benthic habitats are not well understood. We quantified the effect of nutrient recycling by the grazing
Publikováno v:
Journal of Plankton Research. 33:319-332
The harmful algal species Prymnesium parvum, a toxin-producing mixotrophic haptophyte, has caused massive fish kills in select inland Texas water bodies. Though P. parvum is present in a number of water bodies and Gulf of Mexico estuaries, it does no
Autor:
Leslie Schwierzke-Wade, Daniel L. Roelke, James P. Grover, Theodore W. Valenti, Bryan W. Brooks
Publikováno v:
Journal of Plankton Research. 33:309-317
The toxic haptophyte Prymnesium parvum is an alga that causes fish-killing blooms worldwide. In Texas (USA), P. parvum blooms occur in inland brackish waters and have recently increased in frequency and magnitude. Here, we document the development an
Autor:
James P. Grover, Daniel L. Roelke, Susan V. James, Krista N. Prosser, Bryan W. Brooks, Theodore W. Valenti
Publikováno v:
Journal of Plankton Research. 33:265-272
Although a number of physical and chemical factors can influence ambient toxicity associated with Prymnesium parvum blooms in aquatic systems, the role of natural sunlight on the magnitude and duration of aquatic toxicity is less understood, particul
Autor:
Bryan W. Brooks, Susan V. James, James P. Grover, Kevin A. Schug, Daniel L. Roelke, Mieke Lahousse, Theodore W. Valenti
Publikováno v:
Toxicon. 55:990-998
The harmful algal bloom species Prymnesium parvum has caused millions of dollars in damage to fisheries around the world. These fish kills have been attributed to P. parvum releasing a mixture of toxins in the water. The characterized toxins, reporte