Coral recruitment data to support the core analyses from Mo'orea and St. John, VI from 2006-2019.

<p><strong>Overview</strong></p> <p>The reefs in Mo'orea and St. John have been monitored for decades, and recent publications from these efforts provide the ecological background to fully interpret the present results. Coral cover (pooled among taxa) for all three habitats in Mo'orea, as well as St. John, are presented, with these data originating from photoquadrats (0.5 × 0.5 m) that have been recorded annually at permanent locations from 2005 to 2019. In brief, in Mo'orea, the three habitats were sampled at six sites around the island, with 40 photoquadrats/site at 10-m and 17-m depth on the fore reef, and 20 photoquadrats/bommie, and five bommies/site, in the back reef. In 2005, photoquadrats were randomly positioned along a ~ 50 m transect at 10-m and 17-m depth at each site on the fore reef, and thereafter were sampled in the same positions. Five photoquadrats were randomly positioned along four, 5-m transects along cardinal axes at each bommie every year. In St. John, the fringing reefs (at 7-9-m depth) were sampled at six sites, with 40 photoquadrats randomly positioned every year along a single 40-m transect at each site.</p> <p>Photoquadrats from the fore reef and from St. John were analyzed using CoralNet Software, with 200 dots randomly located on each image, and the substratum beneath each dot identified. The photoquadrats in the back reef were analyzed with a coarser resolution in which the dominant substratum is each of 25 sub-squares in each photoquadrat was identified (i.e., providing 4% resolution). The cover of scleractinians (pooled among taxa) is presented using sites as replicates, and mean cover by year is used in tests of association with concurrent coral recruitment.</p> <p>To test the hypotheses guiding the present study, coral recruitment was measured in Mo'orea and St. John using settlement tiles deployed from 2005 to 2019, and loggers were used to measure temperature. The immersion times of settlement tiles slightly differed between regions because the two sampling programs originally were designed for different purposes.</p>概述 莫雷阿岛（Mo'orea）与圣约翰岛（St. John）的珊瑚礁已被持续监测数十年，此前基于该监测工作发表的相关研究为全面解读本研究结果提供了完整的生态学背景支撑。本数据集呈现了莫雷阿岛三类生境以及圣约翰岛的珊瑚盖度（按类群合并统计），相关数据来源于2005年至2019年每年在固定点位拍摄的样方照片（photoquadrats），单张样方照片尺寸为0.5 × 0.5米。简言之，莫雷阿岛的三类生境在全岛6个样点开展采样：前礁（fore reef）在10米与17米水深处，每个样点布设40张样方照片；后礁（back reef）则在每个珊瑚丘（bommie）布设20张样方照片，每个样点设置5个珊瑚丘。2005年，前礁各采样点在10米与17米水深处沿约50米样带随机布设样方照片，后续年份均在相同点位开展采样。每年在每个珊瑚丘上，沿四个方位轴方向的5米样带随机布设5张样方照片。圣约翰岛的裙礁（fringing reef）分布于7-9米水深，共设置6个采样点，每年沿单条40米样带随机布设40张样方照片。 前礁与圣约翰岛的样方照片采用CoralNet软件进行分析：每张图像随机放置200个采样点，识别每个点下方的底质类型。后礁的样方照片则采用较低分辨率的分析方式：识别每张样方照片中25个子方格各自的优势底质类型，即分辨率为4%。本数据集呈现了石珊瑚（scleractinians，按类群合并统计）的盖度，以采样点作为重复单元；年度平均盖度用于开展与同期珊瑚幼体补充量（coral recruitment）的关联检验。 为验证支撑本研究的科学假设，研究团队于2005年至2019年在莫雷阿岛与圣约翰岛部署附着定居瓦片（settlement tiles）以测量珊瑚幼体补充量，并使用温度记录仪记录水温。由于两个采样项目最初的设计目标不同，附着定居瓦片在两个区域的浸泡时长略有差异。