Strontium Isoscape (87Sr/86Sr) in Surface Water from the Amazon Basin

Spatial patterns of strontium isotope ratios (87Sr/86Sr) provide valuable information on geological and biogeochemical processes in aquatic systems. We present the first detailed isoscape of strontium isotope ratios in surface waters of the Amazon Basin.
This dataset was generated by interpolating data published in the literature and new samples collected in the region. The resulting isoscape can be used to:
-Infer the provenance of aquatic organisms: By analyzing the isotopic composition of calcified structures of fish and other organisms, it is possible to trace their areas of origin and migration within the watershed.
Understanding hydrogeological processes: The spatial variation of the 87Sr/86Sr ratio in surface water reflects the geological heterogeneity of the basin and can be used to investigate processes such as the mixing of groundwater and surface water, erosion and sediment transport.
-Assessing the influence of human activities: Strontium isoscape can serve as a tool for assessing the impact of activities such as mining and the construction of hydroelectric dams on the isotopic composition of waters and, consequently, on aquatic ecosystems.
The data available includes:
-87Sr/86Sr ratio values: Strontium isotope ratio values are displayed for each pixel.
-Digital isoscape model: Spatial representation of the variation in the 87Sr/86Sr ratio in the river basin.

锶同位素比率（87Sr/86Sr）的空间分布模式为研究水生系统中地质及生物地球化学过程提供了宝贵信息。本研究首次详细阐述了亚马逊流域地表水中锶同位素比率的等位图。该数据集通过插值文献中发布的数据和区域内新采集的样本生成。所得等位图可用于：
- 推断水生生物的起源：通过分析鱼类及其他生物的钙化结构同位素组成，可以追溯其流域内的起源和迁徙区域。
- 解析水文地质过程：地表水中87Sr/86Sr比率的时空变化反映了流域的地质异质性，可用于研究地下水与地表水的混合、侵蚀及泥沙运输等过程。
- 评估人类活动的影响：锶同位素等位图可作为评估采矿和水电大坝建设等活动对水体同位素组成及由此产生的对水生生态系统影响的工具。
该数据集包含以下内容：
- 87Sr/86Sr比率值：每个像素点展示锶同位素比率值。
- 数字等位图模型：展示河流流域中87Sr/86Sr比率变化的空間表征。