Table 1. Health indicators for coral communities of six regions in the Xisha Islands.
| Indicators | Bei Jiao | Yongxing Dao | Yongle Atoll | Yuzhuo Jiao | Panshi Yu | Langhua Jiao |
|---|---|---|---|---|---|---|
| Species richness | 163 | 95 | 140 | 96 | 38 | 102 |
| Shannon–Wiener index | 3.31 (3.42–3.29) | 3.39 (3.50–3.20) | 3.25 (3.45–3.16) | 2.81 (3.07–2.73) | 1.04 (1.94–0) | 2.89 (3.03–1.81) |
| Pielou’s index | 0.79 (0.85–0.78) | 0.86 (0.86–0.82) | 0.80 (0.83–0.79) | 0.83 (0.91–0.75) | 0.79 (0.85–0.74) | 0.84 (0.89–0.80) |
| Living coral coverage (%) | 38.20 (43.00–35.90) | 19.00 (19.50–18.00) | 25.50 (32.50–16.50) | 11.20 (29.70–4.00) | 0.40 (7.74–0.27) | 12.70 (19.50–1.05) |
| Coral mortality (%) | 3.57 (10.90–2.44) | 1.24 (10.20–0.62) | 15.80 (20.90–11.50) | 42.00 (57.80–5.85) | 34.90 (60.10–25.70) | 5.18 (7.84–3.66) |
| Recent coral mortality (%) | 3.57 (10.90–1.26) | 1.24 (1.44–0.62) | 10.20 (17.00–8.10) | 14.00 (27.40–5.85) | 19.30 (20.90–14.70) | 2.66 (3.69–1.44) |
| Coral bleaching (%) | 49.30 (50.60–48.10) | 13.60 (16.20–10.10) | 40.10 (45.60–35.20) | 23.70 (30.00–17.30) | 9.88 (13.10–0) | 15.00 (20.40–9.88) |
| Coral recruitment (ind. per m2); | 6.27 (7.00–4.93) | 6.67 (8.80–5.33) | 8.53 (10.50–7.20) | 6.47 (9.10–5.70) | 3.20 (3.80–1.83) | 7.80 (9.63–6.87) |
| CoTS density (ind. per 100 m2); | 0.17 (0.58–0) | 0 (0–0) | 0 (0.67–0) | 0.50 (1.58–0) | 0.33 (0.33–0) | 0.33 (0.67–0.25) |
| DI | 0.48 (1.75–0.24) | 0.05 (0.57–0.02) | 0.79 (2.09–0.70) | 0.61 (1.01–0.28) | 0.28 (1.68–0.09) | 0.13 (0.21–0.04) |
| DIrecent | 0.48 (1.75–0.13) | 0.05 (0.07–0.02) | 0.50 (0.71–0.37) | 0.32 (0.55–0.21) | 0.17 (0.71–0.04) | 0.04 (0.11–0.01) |
Note:
Species richness is represented by the total number of scleractinian coral species in each region, and other indicators are represented by the medians (IQR: Q3–Q1).