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Non-Linear Oscillations Detected by Multivariate Analysis in Microcosm Toxicity Tests
WG. Landis
AJ. Markiewicz
GB. Matthews
RA. Matthews
其他書名
Implications for Risk Assessment and Biomonitoring
出版
ASTM International
, 1995
URL
http://books.google.com.hk/books?id=oP57zgEACAAJ&hl=&source=gbs_api
註釋
This study compares the dynamics of the effects of the water soluble fraction (WSF) of both Jet-A and JP-4 using the Standard Aquatic Microcosm (SAM) using several types of multivariate analysis. In these studies we investigate the common assumption in environmental toxicology, that after the initial stress, ecosystems recover to resemble the control or reference state. This assumption may be based more on our inability to observe an ecosystem with sufficient resolution to detect differences, than reality. Among the more interesting effects observed in both studies were the shifts in time of population peaks and some other variables compared to non-dosed microcosms. In both experiments, multivariate analysis was able to differentiate oscillations that separate the treatments from the reference group, followed by what would normally appear as recovery, followed by another separation into treatment groups as distinct from the reference treatment. These patterns generally were not detected by conventional analysis.
