Table 2. Calculated Bioaccumulation (BAFs) and Biomagnification Factors (BMFs) for Per and Polyfluoroalkyl Substances (PFAS) in Abiotic and Biotic Compartments of a Tree Swallow Food Web in Southwestern Ontario in 2021a.
| short-chain
PFCAs |
long-chain
PFCAs |
long-chain
PFSAs |
precursors |
|||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PFPeA | PFHxA | PFOA | PFNA | PFDA | PFDoA | PFTrDA | PFOS | PFDS | 6:2 FTS | 5:3 FTCA | PFOSA | N-MeFOSA | N-EtFOSA | N-MeFOSAA | N-EtFOSAA | N-EtFOSE | ||
| BAF | AI/SW | 20.1 | 11.5 | 16.7 | - | 100 | - | - | 243 | - | - | - | - | - | - | 7.98 | 1114 | - |
| AI/sediment | - | 0.25 | 0.34 | - | - | 0.62 | 0.86 | 0.73 | 0.24 | - | - | 0.94 | - | - | 0.23 | 0.47 | - | |
| GI/SW | - | - | - | 370 | 820 | - | - | 1600 | - | - | - | - | - | - | 5.11 | 457 | - | |
| liver/SW | - | - | - | 1340 | - | - | - | 4863 | - | - | - | - | - | - | 12.3 | 1128 | - | |
| TI/air | - | - | - | - | - | - | - | 20.8 | - | 137 | - | - | - | - | - | - | - | |
| GI/air | - | - | - | 370 | 410 | - | 85.2 | 95.8 | - | - | - | - | 325 | 220 | - | - | 622 | |
| liver/air | - | - | - | 1340 | 1350 | - | - | 292 | - | - | - | - | - | - | - | - | - | |
| BMF | GI/AI | - | - | - | - | 8.21 | 0.48 | 0.71 | 6.58 | 1.42 | - | 0.53 | 0.39 | - | - | 0.63 | 0.41 | - |
| liver/AI | - | - | - | - | 27.3 | - | - | 19.9 | - | - | - | - | - | - | 1.54 | 1.01 | - | |
| GI/TI | - | - | - | - | - | - | - | 4.62 | - | - | - | - | - | - | - | - | - | |
| liver/TI | - | - | - | - | - | - | - | 14.0 | - | - | - | - | - | - | - | - | - | |
a
Short-chain PFCAs: ≤ C7. Long-chain PFCAs: ≥ C8. Long-chain PFSAs: ≥ C7. See Table S1 for full PFAS chemical names· Nestling samples involved their gastrointestinal tract (GI) and livers, SW = surface water, TI= terrestrial invertebrates, and AI = aquatic invertebrates. BAFs and BMFs that could not be calculated are identified as “-”·