Design and interpretation of toxic chemical distribution and stress : Detroit River case study G.D. Haffner, Sara Wood and Alice Grgicak-Manion Great Lakes.

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Presentation transcript:

Design and interpretation of toxic chemical distribution and stress : Detroit River case study G.D. Haffner, Sara Wood and Alice Grgicak-Manion Great Lakes Institute for Environmental Research, Universitry of Windsor, Ontario, Canada curriculum in natural environmental science, 2005

Stratified/random sampling design for the Detroit River. This design reflects the overall health of the river system and provides the basis for powerful statistical analysis curriculum in natural environmental science, 2005

A cluster diagram illustrating the three primary benthic communities curriculum in natural environmental science, 2005

The relative composition of the two depositional and one high energy benthic community curriculum in natural environmental science, 2005

The spatial distribution of the three benthic communities within the Detroit River. Note that although Community 2 tends to aggregate along the lower, western reach of the river, there is no overall pattern of distribution curriculum in natural environmental science, 2005

Spatial distribution of sites exceeding either LEL or SEL guidelines. Most sampled sites exceeded the guidelines for at least one metal. curriculum in natural environmental science, 2005

GIS representation of the spatial distributions of Pb and Cd in the Detroit River indicating that different processes were regulating the fate of these metals curriculum in natural environmental science, 2005

GIS representation of the spatial distributions of Zn and Hg in the Detroit River indicating that different processes were regulating the fate of these metals curriculum in natural environmental science, 2005

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