Coral reef surveys throughout the Western Indian Ocean between 2004 and 2011.

Countries are ordered from north to south latitudes in the WIO. We found no evidence of biased sampling effort over time across latitude, mainland-island environments or fisheries management, however some sites were only sampled in one type of management and most sites were not sampled through the entire time period (see Fig. S1, S2).

本研究涉及的国家依据西印度洋（Western Indian Ocean, WIO）内的纬度梯度由北至南排序。我们未发现随时间推移，在纬度梯度、主岛-海岛生境或渔业管理方式下存在采样投入偏差的证据，但部分采样点位仅在单一管理类型下被采样，且绝大多数点位未在完整时间周期内完成全程采样（详见补充图S1、S2）。