Table 3
Correlations analysis between rate of changes in catches and the explanatory variables listed in Table 2. Two-groups Wilcoxon comparisons of rate of changes and selected explanatory variables for A: all lakes except L. Baikal, and B: all lakes except L. Peipsi, Vänern, Vättern and Baikal. Small-medium lakes correspond to lakes whose surface area and volume are smaller than 100km2 and 10km3. High nutrient lakes encompass eu- and mesotrophic lakes while poor-nutrient lakes refer to oligo- and ultraoligotrophic lakes. Rapid warming area corresponds to geographic area where air warming was the fastest (0.06°C.year−1).
| A. | All lakes without L. Baïkal | ||
|---|---|---|---|
| Relationship between the rates of change in catches and variables (Table 2) | Spearman p-value | Spearman R | |
| lake_lat_decdeg | 0.95 | -0.02 | |
| elevation_m | 0.68 | 0.09 | |
| avg_depth_m | 0.76 | 0.06 | |
| max_depth_m | 0.56 | -0.12 | |
| Logarea km2 | 0.036 | -0.42 | |
| Logavg_vol_km3. | 0.028 | -0.43 | |
| TP | 0.0092 | 0.50 | |
| LakeSSWTtrend | 0.31 | -0.29 | |
| SenSlopeT_Winter | 0.27 | 0.22 | |
| SenSlopeT_Spring | 0.022 | 0.45 | |
| SenSlopeT_Summer | 0.025 | 0.44 | |
| SenSlopeT_Autumn | 0.011 | 0.49 | |
| Comparison of rates of change in catches between lake categories | Wilcoxon p-value | ||
| Size (Small-medium vs. Large) | 0.067 | ||
| Productivity (Eutro-mesotrophic vs. oligo-ultraoligotrophic) | 0.013 | ||
| Comparison of variables between lakes showing significant decrease in catches and others | Wilcoxon p-value | ||
| Logarea_km2 | 0.061 | ||
| Logavg_vol_km3 | 0.052 | ||
| TP | 0.033 | ||
| Comparison of rates of change in catches between high and poor-nutrient lakes | Kruskal-Wallis p-value | ||
| Sen's slope | <0.01 | ||
| Comparison of rates of change in catches between high and poor-nutrient lakes in rapid warming area | Wilcoxon p-value | ||
| Sen's slope | 0.019 | ||
| B. | All lakes without L. Peipsi, Vänern, Vättern Baïkal | ||
| Relationship between the rates of change in catches and variables (Table 2) | Spearman p-value | Spearman R | |
| lake_lat_decdeg | 1 | 0.00 | |
| elevation_m | 0.55 | 0.13 | |
| avg_depth_m | 0.67 | 0.10 | |
| max_depth_m | 0.68 | -0.09 | |
| Logarea_km2 | 0.049 | -0.42 | |
| Logavg_vol_km3 | 0.04 | -0.43 | |
| TP | 0.019 | 0.49 | |
| LakeSSWTtrend | 0.4 | -0.27 | |
| SenSlopeT_Winter | 0.13 | 0.38 | |
| SenSlopeT_Spring | 0.023 | 0.47 | |
| SenSlopeT_Summer | 0.022 | 0.48 | |
| SenSlopeT_Autumn | 0.022 | 0.48 | |
| Comparison of rates of change in catches between lake categories | Wilcoxon p-value | ||
| Size (Small-medium vs. Large) | 0.059 | ||
| Productivity (Eutro-mesotrophic vs. oligo-ultraoligotrophic) | 0.026 | ||
| Comparison of variables between lakes showing significant decrease in catches and others | Wilcoxon p-value | ||
| Logarea_km2 | 0.096 | ||
| Logavg_vol_km3 | 0.089 | ||
| TP | 0.089 | ||
| Comparison of rates of change in catches between high and poor-nutrient lakes | Kruskal-Wallis p-value | ||
| Sen's slope | 0.03 | ||
| Comparison of rates of change in catches between high and poor-nutrient lakes in rapid warming area | Wilcoxon p-value | ||
| Sen's slope | 0.046 | ||
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