Environmental factors influencing microcystin distribution and concentration in the Midwestern United States

Cyanotoxins in inland lakes of the United States: Occurrence and potential recreational health risks in the EPA National Lakes Assessment 2007

“…4). Concentrations ranged from <0.10 to 940 mg/L (mean: 29 mg/L; median 7.6 mg/L) and is consistent with other work (Jones and Bachman, 1976;Graham et al, 2004;Phillips et al, 2008). Overall phytoplankton abundance ranged from 3 to 5.0E6 cells/ mL with a mean abundance of 4.0E4 cells/mL.…”

Cyanobacteria and their toxins in Guanting Reservoir of Beijing, China

“…Obviously, these factors varied temporally and spatially; it was not surprising that the relationships between MC and environmental factors were not always consistent. For example, MC in plankton was strongly correlated with TN of the lake water in America [25], but not in Canada [26], Germany [22] and in the present study.…”

Role of contemporary and historic vegetation on nutrients in Missouri reservoirs: implications for developing nutrient criteria

“…In contrast, groundwater in some areas of the Plains is naturally saline, and communities rely on surface water supplies. Several water supply reservoirs are located in valleys historically in prairie vegetation (70-100%), and cropland currently dominates their catchments (Knowlton and Jones 2007); they are eutrophic, and some samples have measurable algal toxins (Graham et al 2004). In these nutrient impaired systems, land retirement from cropland to prairie vegetation or forest may be an appropriate tool for drastically reducing nutrient loads from agricultural catchments (Ribaudo et al 1994).…”