Table B2
Metadata of candidate environmental predictors explored for this study. Variables selected for the final ensemble modeling process are highlighted in grey. Abbr. = Abbreviation; Native res. = Native resolution; Ecol. sel. = Ecological selection; Cor. sel. = Correlation selection; and BIC GAM = BIC selection on GAM. Native resolution given in decimal degrees. Mean = Long-term average of monthly bottom values for the period 2010-2020. Long-term minimum = Long-term average of the minimum value of the bottom variable per year for the period 2010–2020. Long-term maximum = Long-term average of the maximum value of the bottom variable per year for the period 2010–2020. Range = Range of the bottom variable for the period 2010–2020 (i.e., average of the absolute difference between the minimum and maximum value of the variable per year).
| Layer | Abbr. | Source | Meaning - Unity | Native res. | Ecological importance | Ecol. sel. | Cor. sel. | BIC GAM |
|---|---|---|---|---|---|---|---|---|
| Depth | depth | EMODnet | Distance between the surface and the seafloor (in m) | 0.001 | +: Driver of benthic community =: Constant over time |
Yes | Yes | Yes |
| Slope | slope | EMODnet derived | Slope degree of the seafloor (in degree) | 0.001 | +: Driver of benthic community -: Correlated with depth |
Yes | No | |
| Rugosity | rough | EMODnet derived | Difference between the maximum and the minimum value of bathymetry (in μm) | 0.001 | +: Driver of benthic community -: Correlated with depth |
Yes | No | |
| Average grain size | grain_size | EMODnet broad-scale seabed habitat map | Average size of grain fractions including in the sediment (in mm) | 0.001 | +: Driver of benthic community =: Constant over time -: No significant response |
Yes | Yes | No |
| Mean bottom temperature | temp_mean | Bio-Oracle v3.0 | in T°C | 0.05 | +: Driver of benthic community +: Sensitive to climate change |
Yes | Yes | Yes |
| Long-term minimum bottom temperature | temp_ltmin | Bio-Oracle v3.0 | in T°C | 0.05 | -: No significant response | Yes | Yes | No |
| Long-term maximum bottom temperature | temp_ltmax | Bio-Oracle v3.0 | in T°C | 0.05 | -: Correlated with mean bottom temperature | Yes | No | |
| Range of bottom temperature | temp_range | Bio-Oracle v3.0 | in T°C | 0.05 | -: Correlated with depth | Yes | No | |
| Mean bottom current velocity | current_velocity_mean | Bio-Oracle v3.0 | in m.s−1 | 0.05 | +: Driver of suspension feeders controlling food supply -: No significant response |
Yes | Yes | No |
| Long-term minimum bottom current velocity | current_velocity_ltmin | Bio-Oracle v3.0 | in m.s−1 | 0.05 | -: No significant response | Yes | Yes | No |
| Long-term maximum bottom current velocity | current_velocity_ltmax | Bio-Oracle v3.0 | in m.s−1 | 0.05 | -: No significant response | Yes | Yes | No |
| Range of bottom current velocity | current_velocity_range | Bio-Oracle v3.0 | in m.s−1 | 0.05 | -: No significant response | Yes | Yes | No |
| Mean bottom salinity | salinity_mean | Bio-Oracle v3.0 | in PSS | 0.05 | -: Correlated with depth | Yes | No | |
| Long-term minimum bottom salinity | salinity_ltmin | Bio-Oracle v3.0 | in PSS | 0.05 | -: Correlated with depth | Yes | No | |
| Long-term maximum bottom salinity | salinity_ltmax | Bio-Oracle v3.0 | in PSS | 0.05 | +: Driver of benthic community +: Sensitive to climate change |
Yes | Yes | Yes |
| Range of bottom salinity | salinity_range | Bio-Oracle v3.0 | in PSS | 0.05 | -: Correlated with depth | Yes | No | |
| Mean bottom oxygen | O2_mean | Bio-Oracle v3.0 | in mmol.m−3 | 0.05 | +: Driver of benthic communities +: Sensitive to climate change -: Correlated with depth |
Yes | No | |
| Long-term minimum bottom oxygen | O2_ltmin | Bio-Oracle v3.0 | in mmol.m−3 | 0.05 | +: Driver of benthic communities +: Sensitive to climate change |
Yes | Yes | Yes |
| Long-term maximum bottom oxygen | O2_ltmax | Bio-Oracle v3.0 | in mmol.m−3 | 0.05 | -: Correlated with depth | Yes | Yes | Yes |
| Range of bottom oxygen | O2_range | Bio-Oracle v3.0 | in mmol.m−3 | 0.05 | -: Correlated with depth | Yes | Yes | Yes |
| Mean bottom chlorophyll A | chl_mean | Bio-Oracle v3.0 | in mg.m−3 | 0.05 | +: Proxy of food supply +: Sensitive to climate change -: Correlated with depth |
Yes | No | |
| Long-term minimum bottom chlorophyll A | chl_ltmin | Bio-Oracle v3.0 | in mg.m−3 | 0.05 | -: Correlated with depth | Yes | No | |
| Long-term minimum bottom chlorophyll A | chl_ltmax | Bio-Oracle v3.0 | in mg.m−3 | 0.05 | -: Correlated with depth | Yes | No | |
| Range of bottom chlorophyll A | chl_range | Bio-Oracle v3.0 | in mg.m−3 | 0.05 | -: Correlated with depth | Yes | No | |
| Mean bottom primary productivity | phyc_mean | Bio-Oracle v3.0 | in mmol.m−3 | 0.05 | +: Proxy of food supply +: Sensitive to climate change -: Correlated with depth |
Yes | No | |
| Long-term minimum bottom primary productivity | phyc_ltmin | Bio-Oracle v3.0 | in mmol.m−3 | 0.05 | -: Correlated with depth | Yes | No | |
| Long-term maximum bottom primary productivity | phyc_ltmax | Bio-Oracle v3.0 | in mmol.m−3 | 0.05 | -: Correlated with depth | Yes | No | |
| Range of bottom primary productivity | phyc_range | Bio-Oracle v3.0 | in mmol.m−3 | 0.05 | -: Correlated with depth | Yes | No | |
| Mean bottom pH | pH_mean | Bio-Oracle v3.0 | – | 0.05 | +: Drive the metabolism of calcareous organisms +: Sensitive to climate change -: Too scarce range observed in the Mediterranean -: Uncertain effect on poorly calcified species |
No | ||
| Long-term minimum bottom pH | pH_ltmin | Bio-Oracle v3.0 | – | 0.05 | -: Too scarce observed range in the Mediterranean | No | ||
| Long-term maximum bottom pH | pH_ltmax | Bio-Oracle v3.0 | – | 0.05 | -: Too scarce observed range in the Mediterranean | No | ||
| Range of bottom pH | pH_range | Bio-Oracle v3.0 | – | 0.05 | -: Too scarce observed range in the Mediterranean | No |
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