Spatial Mismatches between Cyclone Exposure and Food System Impacts in Vanuatu: Integrating Topographic, Agro-Ecological, and Infrastructure Mediators for Resilience Planning
Table 3. Provincial Food Security Resilience Index (FSRe) Scores andcomponent breakdown
| Province | Exposure sub-index (reversed HEI) | Impact sub-index (reversed ISI) | Topographic buffering | Agro-ecological buffering | Infrastructure & circulation | Composite FSRe score (0–100) | Resilience category |
| Torba | 0.72 | 0.66 | 0.74 | 0.79 | 0.32 | 57 | Moderate resilience — transitional (hidden hotspot risk) |
| Sanma | 0.48 | 0.55 | 0.62 | 0.71 | 0.69 | 61 | Buffered stronghold |
| Penama | 0.44 | 0.47 | 0.56 | 0.64 | 0.55 | 53 | Elevated risk |
| Malampa | 0.46 | 0.52 | 0.58 | 0.68 | 0.63 | 58 | Moderate resilience — transitional |
| Shefa | 0.33 | 0.38 | 0.45 | 0.52 | 0.78 | 46 | Critical / fragile |
| Tafea | 0.39 | 0.41 | 0.49 | 0.59 | 0.51 | 47 | Critical / fragile |
Component sub-indices are normalized to a 0–1 scale (higher values = greater resilience contribution). The composite FSRe score is expressed on a 0–100 scale derived from the weighted formula: FSRe = 30×(1−HEI) + 30×Agricultural Capacity + 25×Infrastructure Capacity + 15×Recovery Speed, where each component is first normalized to 0–100. Four resilience categories are defined: Buffered stronghold (FSRe ≥ 60); Moderate resilience (FSRe 55–60); Elevated risk (FSRe 50–55); Critical/fragile (FSRe < 50). Provinces scoring within 3 FSRe points of a category boundary (Torba: 57; Malampa: 58) are considered transitional; sensitivity analysis (Spearman ρ > 0.88) confirms that provincial rankings remain stable under ±20% weight variation, with only minor boundary shifts between adjacent categories. Sub-index component scores are presented for analytical transparency and are not independently weighted in the composite score calculation.