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Multidimensional scaling ordination of pairwise estimates of similarity (Bray-Curtis equation) of bacterioplankton communities calculated from DGGE banding patterns based on relative band density for DNA samples collected on 10 June (diamonds), 1 July (squares), 22 July (triangles), and 4 August (circles) of 2004. Symbol shading indicates oxic (open), hypoxic (gray), and anoxic (black) samples. Oxic and anoxic samples are circled. The gray region indicates samples containing sulfides.
