Table 3. Dissimilarity in community membership (Jaccard) and structure (Bray-Curtis) between both estuarine sediment types (HBM and LBM) based on 16S rRNA, nirK and nirS genes.
| Jaccard | Bray-Curtis | ||
|---|---|---|---|
| All OTUs | 16S rRNA | 0.732897 | 0.299214 |
| nirK | 0.153846 | 0.185174 | |
| nirS | 0.255556 | 0.065105 | |
| Abundant OTUs | 16S rRNA | 0.357143 | 0.260035 |
| nirK | 0.411765 | 0.181191 | |
| nirS | 0.222222 | 0.0589 | |
| Non-abundant OTUs | 16S rRNA | 0.735594 | 0.402036 |
| nirK | 0.213333 | 0.430228 | |
| nirS | 0.277108 | 0.48913 |
Three different levels were assessed: total community (all), abundant and non-abundant fraction. An OTU was defined as abundant when its relative abundance was larger than 1%. Permanova analyses were performed to determine significant differences in community structure and membership.