PMID: 12785590Jun 6, 2003Paper

Variation, replication, and power analysis of Myriophyllum spp. microcosm toxicity data

Environmental Toxicology and Chemistry
Mark L HansonKeith R Solomon

Abstract

Myriophyllum spp. have been proposed as a new standard laboratory aquatic macrophyte test species for the registration of pesticides. The main objectives of this investigation were to determine the power of Myriophyllum sibiricum and Myriophyllum spicatum toxicity data derived from an outdoor microcosm bioassay, to evaluate the variation of 10 different aquatic plant endpoints and to calculate the minimum detectable difference for these endpoints, to determine the replication required to detect ecologically significant changes from control for these endpoints, and to make recommendations for future field studies with Myriophyllum spp. Control data from four different studies that characterized haloacetic acid toxicity with Myriophyllum spp. for durations of three to six weeks during the summer of 1999 with five treatment levels (n = 3), including control, were examined. Endpoint coefficient of variation ranged, on average, from 6 to 28%. Node number and plant length endpoints were consistently the most statistically powerful for both plant species. It was possible to detect approximately 30% change from control in both endpoints with high statistical power (beta = 0.2, alpha = 0.05, n = 3). The range of minimum detectable diffe...Continue Reading

Citations

Jun 6, 2009·Ecotoxicology·Hans SandersonKeith R Solomon
Mar 19, 2013·Journal of Environmental Management·Fernanda Aguiar SouzaLeila Teresinha Maranho
Nov 19, 2011·Environmental Toxicology and Chemistry·Ivana TeodorovićIvana Ivančev Tumbas
Nov 3, 2004·Environmental Pollution·Richard A BrainKeith R Solomon
Jun 9, 2004·Environmental Pollution·Mark L Hanson, Keith R Solomon
Jun 9, 2004·Environmental Pollution·Mark L Hanson, Keith R Solomon
Sep 11, 2007·Environmental Pollution·Gertie H P ArtsJac T N M Thissen
May 8, 2018·Integrated Environmental Assessment and Management·Jane P StaveleySteve McMaster
May 17, 2006·Pest Management Science·Katja KnauerStephen J Maund
Apr 21, 2007·Nature Protocols·Richard A Brain, Keith R Solomon
May 21, 2008·Environmental Science and Pollution Research International·Katja KnauerUte Feiler

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