Sediment grain size dataset of intertidal shellfish sandbanks within Ría de Arousa, Spain

The GEOMA Research group from the University of Vigo implements a solution to improve the knowledge of the sediment dynamics, the stability of the ecosystem substratum, and its response to the predicted Climate Change outcome (INTERM). The INTERM solution is based on sedimentological monitoring of sandbanks at specific locations of clam exploitation in the Ría de Arousa (Pontevedra, Spain). Since 2022, we collected sediments in seven locations with current (Camaxe, Xastelas, O Sarrido, Fefiñans, O Bohido, and Lavanqueira) or stopped (Lombos de Ulla) shellfish activity. The sediment grain size distribution was determined by dry and wet sieving using meshes of 2, 1, 0.5, 0.25, 0.125, and 0.063 mm. We separate the sediment grain size fraction larger and smaller than 0.063mm by wet sieving. The grain size distribution of the grains larger than 0.063 was determined by dry sieving whereas for the grains smaller than 0.063 by the pipette method (see Folk, R. L. (1980). Petrology of sedimentary rocks. Hemphill publishing company). This study is part of the “Accelerating and upscaling transformational adaptation in Europe: demonstration of water-related innovation packages (TRANSFORMAR)" coordinated by the Universiteit Antwerpen and funded by the European Union’s Horizon program (H2020_101036683). This version: Includes new grain size measurements performed on samples collected in February 2025 Corrects bugs detected in the weight of the fine fraction. Additionally, 12 sample distributions (Table 1) have been replaced with new measurements due to processing errors Corrects minor errors Table 1. Sample distributions replaced with new measurements Bank Sample Date (yy/mm/dd) Camaxe CX7 2022/10/25 Camaxe CXPlaya 2022/10/25 Camaxe CX8 2022/10/25 Xastelas XLT2 2022/10/25 Xastelas XLT3 2022/10/25 Xastelas X10 2022/10/25 Lavanqueira L3 2022/10/25 Lavanqueira L4 2022/10/25 Sarrido SAR4 2023/09/30 Lombos M5 2024/02/26 Lombos M6 2024/02/26 Xastelas X10 2024/02/12西班牙维戈大学（University of Vigo）GEOMA研究团队开发了一套解决方案，旨在深化对沉积物动力过程、生态系统基底稳定性及其对预测气候变化（INTERM）响应的认知。该INTERM方案基于对西班牙蓬特韦德拉省阿尔罗萨湾（Ría de Arousa）文蛤养殖特定区域的沙洲开展沉积学监测。 自2022年起，我们在7个点位采集了沉积物样本，其中包括6个仍开展贝类养殖活动的点位（Camaxe、Xastelas、O Sarrido、Fefiñans、O Bohido、Lavanqueira）以及1个已停止贝类养殖活动的点位（Lombos de Ulla）。沉积物粒度分布通过干筛法与湿筛法联合测定，所用筛孔孔径依次为2、1、0.5、0.25、0.125及0.063 mm。我们通过湿筛法将沉积物划分为粒径大于0.063 mm与小于0.063 mm的两个粒级：其中大于0.063 mm的粒级粒度分布采用干筛法测定，小于0.063 mm的粒级则采用吸管法测定（详见Folk, R. L. (1980). *Petrology of sedimentary rocks*. Hemphill Publishing Company）。 本研究隶属于由安特卫普大学（Universiteit Antwerpen）协调、欧盟地平线2020计划（H2020_101036683）资助的“欧洲转型性适应的加速与规模化：水相关创新包示范（TRANSFORMAR）”项目。 本版本更新内容如下： 1. 新增2025年2月采集的样本的粒度测量数据； 2. 修正了细粒组分重量检测中发现的错误；此外，因处理误差导致的12组样本粒度分布数据（表1）已替换为新的测量结果； 3. 修正了少量细微错误。 表1 已替换为新测量结果的样本分布 | 点位（Bank） | 样本编号 | 采样日期（yy/mm/dd） | | ---- | -------- | ------------------- | | Camaxe | CX7 | 2022/10/25 | | Camaxe | CXPlaya | 2022/10/25 | | Camaxe | CX8 | 2022/10/25 | | Xastelas | XLT2 | 2022/10/25 | | Xastelas | XLT3 | 2022/10/25 | | Xastelas | X10 | 2022/10/25 | | Lavanqueira | L3 | 2022/10/25 | | Lavanqueira | L4 | 2022/10/25 | | Sarrido | SAR4 | 2023/09/30 | | Lombos | M5 | 2024/02/26 | | Lombos | M6 | 2024/02/26 | | Xastelas | X10 | 2024/02/12 |