Fig. 4From: Effect of nitrogen addition on the carbon metabolism of soil microorganisms in a Calamagrostis angustifolia wetland of the Sanjiang Plain, northeastern ChinaHeat map and hierarchical cluster analysis based on the average well color development (AWCD) at 120 h of soil microbial communities under different nitrogen addition treatments. The samples are grouped based on their similarity to each other. The clustering results are arranged horizontally. Higher AWCD values are indicated in dark green, whereas lower AWCD values are indicated in yellow. CK, control; N40, 40 kg N ha−1 a−1; N80, 80 kg N ha−1 a−1Back to article page