近日，鲁东大学于君宝团队报道了黄河三角洲微咸带不同水文连通性条件下沉积物铁的分布特征。这一研究成果于2026年3月16日发表在《中国地理科学》杂志上。

水文连通性是湿地生态过程的主要非生物驱动因子，尤其在咸淡水过渡带中表现突出。潮沟作为该区域内塑造的关键地貌单元，是滨海湿地营养元素分布、组成、迁移与转化的核心通道。

该研究旨在可视化中国黄河三角洲咸淡水过渡带潮沟的水文连通性，并探究其对沉积物中多种铁化合物含量及分布的影响。结果表明，研究区南部潮沟呈现强水文连通性。潮沟密度梯度特征明显：内陆近侧与海洋近侧密度最低，而中间过渡区域密度最高。同时，潮沟密度较高的采样样带（2–6公里/平方公里）表现出较高的铁含量（平均总铁含量：28.35克/千克），且沉积物总铁含量总体随离潮沟距离增加而升高。此外，该研究揭示酸碱度与铁含量呈负相关，而电导率与铁含量呈正相关。该研究为黄河三角洲滨海湿地沉积物中铁的地球化学研究提供了新的认知。

附：英文原文

Title: Distribution Characteristics of Sediment Iron Under Different Hydrological Connectivity in a Brackish Water Zone of the Yellow River Delta, China

Author: Li, Xue, Guan, Bo, Yu, Junbao, Franziska, Eller, Yang, Jisong, Zhou, Di, Li, Yunzhao, Wang, Xuehong, Zhang, Xin, Qu, Chenyu, Guo, Jifeng

Issue&Volume: 2026-03-16

Abstract: Hydrological connectivity is the main abiotic driver of wetland ecological processes, particularly within the brackish water zone. Tidal creeks, shaped within this zone, serve as key conduits for the distribution, composition, migration, and transformation of nutrient elements in coastal wetlands. In this study, we aimed to visualize the hydrological connectivity of tidal creeks in the brackish water zone of the Yellow River Delta, China, and explore the impact on the content and distribution of various iron compounds in the sediment. The results revealed a strong hydrological connectivity in the southern region of the brackish water zone. The tidal creeks exhibited a clear density gradient, with the lowest density found near the inland areas and the ocean, while the highest density was observed in the intermediate regions. Meanwhile, sampling transects with a higher density of tidal creeks (2–6 km/km2) exhibited elevated iron concentrations (average total iron content: 28.35 g/kg), and the total iron content generally increased with distance from the tidal creeks. Furthermore, this study identifies a negative correlation between pH and iron content, whereas electrical conductivity shows a positive correlation with iron levels. The study offers some insights into the study of iron in the sediments of coastal wetlands in the Yellow River Delta.

DOI: 10.1007/s11769-026-1606-x

Source: https://link.springer.com/article/10.1007/s11769-026-1606-x