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Table 4
Spearman's rank significant correlation coefficient (R) for dragonfly assemblages (S and N) and physico-chemical water properties in Plitvice Lakes NP. Sample size (N) = 366, ***p < 0.001, **p < 0.01, *p < 0.05.
| Dragonfly assemblages | Physico-chemical water properties | R | t(N − 2) | p-Value |
|---|---|---|---|---|
| Species richness (S) | Water temperature | 0.27 | 5.36 | *** |
| Oxygen concentration | −0.19 | −3.64 | *** | |
| pH | 0.33 | 6.66 | *** | |
| Conductivity | −0.42 | −8.78 | *** | |
| Alkalinity | −0.41 | −8.65 | *** | |
| Nitrate ions | −0.22 | −4.33 | *** | |
| Water velocity | −0.11 | −2.10 | * | |
| Ammonium ions | 0.11 | 2.17 | * | |
| Abundance (N) | Water temperature | 0.27 | 5.27 | *** |
| Oxygen concentration | −0.19 | −3.63 | *** | |
| pH | 0.34 | 6.82 | *** | |
| Conductivity | −0.43 | −8.95 | *** | |
| Alkalinity | −0.42 | −8.74 | *** | |
| Nitrate ions | −0.22 | −4.25 | *** | |
| Ammonium ions | 0.11 | 2.09 | * |
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