Figure 3.

Bottlenecks and loss in population flow. The magnifying effect of migration on the loss of population flow can be predicted with a bottleneck index, a combined metric based on capacity centrality and estimated habitat loss (see the electronic supplementary material for details). The loss in population flow rises with increasing values of the bottleneck index at low to moderate sea-level rise (SLR). Linear regression models are significant from 50 to 200 cm SLR (p < 0.05) and marginally significant at 250 and 300 cm (p = 0.08 and 0.1). Taxa are labelled (bgtb, bar-tailed godwit (baueri); bgtm, bar-tailed godwit (menzbieri); cs, curlew sandpiper; ec, eastern curlew; gk, great knot; gtt, grey-tailed tattler; lsp, lesser sand plover; rkp, red knot (piersmai); rkr, red knot (rogersi); ts, terek sandpiper).