Table 3.
Trophic position (TP) of ancient tropical seabirds calculated from the composition of their diet [formula (1), TPdiet], formula (3) (TPGlu/Phe 1), and formula (5) (TPGlu/Phe 2). The composition of the seabird diet is taken from Wu, Liu, Fu, Xu, Li, et al. (2017)
| Period | Seabird diet | TPdiet | TPGlu/Phe 1 | TPGlu/Phe 2 |
|---|---|---|---|---|
| MWP | Flying fish: 88 ± 2%; squid: 12% | 3.41 ± 0.01 | 2.63 ± 0.03 | 3.34 ± 0.06 |
| LIA | Flying fish: 37 ± 30%; squid: 63% | 3.56 ± 0.10 | 2.70 ± 0.14 | 3.40 ± 0.30 |
| Past 1,200 years | Flying fish: 80 ± 40%; squid: 20% | 3.44 ± 0.13 | 2.68 ± 0.12 | 3.44 ± 0.26 |