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During May-September 2000-2001, physicochemical data were collected from 241 lakes in Missouri, Iowa, northeastern Kansas, and southern Minnesota U.S.A., to determine the environmental variables associated with high concentrations of the cyanobacterial hepatotoxin microcystin (MC). The study region represents a south-north latitudinal gradient in increasing(More)
This article may be used for research, teaching and private study purposes. Any substantial or systematic reproduction, redistribution , reselling , loan or sub-licensing, systematic supply or distribution in any form to anyone is expressly forbidden. The publisher does not give any warranty express or implied or make any representation that the contents(More)
Mean total suspended solids (TSS), in 135 Missouri reservoirs range from 1.2 to 47 mg/l. The volatile (VSS) and non-volatile (NVSS) fractions range from 0.6 to 9.6 mg/l and 0.5 to 37 mg/l, respectively. %NVSS is the larger fraction and declines through summer as %VSS increases. Suspended solids (particularly VSS) correlate with metrics of lake trophic state(More)
Environmental factors associated with spatiotemporal variation of microcystin (MC) in Mozingo Lake, a Missouri reservoir, were studied during summer 2001, and annual MC trends were characterized from May 2001-May 2002. MC increased during summer, ranging from 20 to1220 ng/L. Seasonal patterns in MC corresponded with chlorophyll >35 µm (Net Chl) and(More)
Graham, J.L. and J.R. Jones. 2007. Microcystin distribution in physical size class separations of natural plankton communities. Lake and Reserv. Manage. 23:161-168. Phytoplankton communities in 30 northern Missouri and Iowa lakes were physically separated into 5 size classes (>100 µm, 53-100 µm, 35-53 µm, 10-35 µm, 1-10 µm) during 15-21 August 2004 to(More)
Response of the amphipod Hyalella azteca exposed to contaminated sediments for 10 to 42 d in laboratory toxicity tests was compared to responses observed in controlled three-month invertebrate colonization exposures conducted in a pond. Sediments evaluated included a sediment spiked with dichlorodiphenyldichloroethane (DDD) or dilutions of a field sediment(More)
Since Hurricane Katrina, there have been numerous lessons learned and improvements in disaster planning and nursing management. The subsequent Hurricane Gustav allowed nurses and disaster planners to "test the system" and identify improvements that worked and did not. The authors outline those improvements and give direction for change and further(More)
Three nurse leaders recount their experiences transitioning from a practice career to an academic career. These nurse leaders discuss their experiences with role transition and gaining new competencies, comparing and contrasting the competencies of nurse educators and nurse leaders. Specific examples are presented addressing collaborative efforts between(More)