Patterns of Change in Metabolic Capabilities of Sediment Microbial Communities in River and Lake Ecosystems

Figure 4

Pattern of utilization (based on mean AWCD) of the 31 carbon substrates for the lake and river sediments across sites and seasons. Shading in the boxes indicates the range of percentage absorbance of the total absorbance of the plate. Values are as follows: white, <0.1%; green, 0.1–2%; yellow, 3-4%; orange, 5-6%; red, >6%. The number of substrates with >4% absorbance for each sampling site is indicated below each column.