Table 2 Proportional contribution of basal and animal-derived food resources to the diet of the benthic community before and after sea-ice breakup for each food web type (ITU, population and taxonomic).
From: Individual diet variability shapes the architecture of Antarctic benthic food webs
Food source | ITU-based approach (trophic-functional variability) | Population-based approach (intrapopulation variability) | Taxonomic approach (mean population variability) | |||
|---|---|---|---|---|---|---|
Before | After | Before | After | Before | After | |
S (nodes) | 130 (59) | 120 (36) | 71 (59) | 50 (36) | 71 (59) | 49 (36) |
Sympagic algae | 0.21 ± 0.04 | 0.19 ± 0.05 | 0.13 ± 0.04 | 0.13 ± 0.08 | 0.13 ± 0.04* | 0.21 ± 0.06 |
Seal faeces | –* | 0.06 ± 0.04 | – | – | 0.09 ± 0.04 | 0.09 ± 0.03 |
Sediment | 0.13 ± 0.02 | 0.12 ± 0.02 | 0.16 ± 0.03 | 0.17 ± 0.03 | 0.17 ± 0.03 | 0.21 ± 0.04 |
Benthic algae | 0.10 ± 0.01 | 0.11 ± 0.02 | 0.07 ± 0.01 | 0.06 ± 0.02 | 0.13 ± 0.06 | 0.05 ± 0.02 |
Epiphytes | 0.09 ± 0.02 | 0.11 ± 0.03 | 0.04 ± 0.01* | 0.09 ± 0.02 | 0.10 ± 0.04 | 0.09 ± 0.06 |
Phytoplankton | 0.10 ± 0.04 | 0.09 ± 0.02 | 0.07 ± 0.02 | 0.05 ± 0.01 | 0.11 ± 0.04 | 0.12 ± 0.02 |
Animals | 0.36 ± 0.03 | 0.33 ± 0.03 | 0.52 ± 0.03 | 0.50 ± 0.04 | 0.29 ± 0.04* | 0.19 ± 0.05 |
