Coral Luminescence records freshwater impacts from the Fitzroy River Basin

This record describes the coral luminescence as a recorder of freshwater impacts from inshore corals of the Fitzroy River Basin. Eight cores from AIMS’ Coral Core Archive were used in this study: Two cores from the same colony were collected from Humpy Island (23.2oS, 151.0oE) collected in1997 - HMP01A, HMP01B, Four cores from four separate colonies were collected from Hummocky Island (23.4oS, 151.1oE), collected in in 2017 - HUM02A, HUM03A, HUM04B, HUM05B Two cores from two separate colonies were collected from Masthead Island (23.5o S, 151.7oE), collected in 2017 - MAS01E, MAS02AThe Hummocky and Masthead Island cores were collected as part of a co-funded project with the Gladstone Healthy Harbour Partnership (Cantin et al 2018)The coral cores slices were photographed under UV light to reveal luminescent lines and analysed for gamma densitometry, measurements of skeletal density and luminescence. Measurements were analysed for relationships between coral records and the river flow data using cross correlation and linear regression analyses.Environmental data for daily river flows were obtained from The Queensland Department of Natural Resources, Mines and Energy (DNRME) Water Monitoring Portal.Geochemical tracers were measured in four coral cores that cover the period from 1677 to 2016. The study focused on 15 trace elements which can provide evidence of changes in the marine environment related to historical and ongoing changes influenced by river systems.

本记录以珊瑚发光信号作为费茨罗伊河盆地近岸珊瑚所受淡水影响的记录指标。本研究使用了澳大利亚海洋科学研究所（Australian Institute of Marine Science, AIMS）珊瑚核心档案库中的8份珊瑚岩芯：
1. 1997年从汉皮岛（23.2°S，151.0°E）的同一珊瑚群体采集的2份岩芯：HMP01A、HMP01B；
2. 2017年从哈默基岛（23.4°S，151.1°E）的4个独立珊瑚群体分别采集的4份岩芯：HUM02A、HUM03A、HUM04B、HUM05B；
3. 2017年从桅顶岛（23.5°S，151.7°E）的2个独立珊瑚群体分别采集的2份岩芯：MAS01E、MAS02A。

哈默基岛与桅顶岛的珊瑚岩芯采集工作，是与格拉德斯通健康港湾合作项目（Cantin等，2018）联合资助项目的一部分。

研究人员对珊瑚岩芯切片进行紫外光成像以显现发光纹层，并开展伽马密度计分析、骨骼密度测量与发光特性测定。通过互相关分析与线性回归分析，探究珊瑚记录与河流流量数据之间的关联。

每日河流流量的环境数据源自昆士兰州自然资源、矿业与能源部（DNRME）水资源监测门户平台。

本研究对覆盖1677年至2016年时段的4份珊瑚岩芯开展了地球化学示踪剂测定，聚焦于15种可反映受河流系统影响的历史与当前海洋环境变化的痕量元素。