王媛媛，张亚斌，苗苗，张国成. 现代珠江三角洲平原螃蟹遗迹与物化条件的响应关系及对古地理的指示[J].河南理工大学学报(自然科学版), doi：10.16186/j.cnki.1673-9787.2025040020.

WANG Y Y，ZHANG Y B，MIAO M，ZHANG G C. The response relationship between crab traces and Physicochemical Stresses in the modern Pearl River Delta plain and its indication to paleogeography [J]. Journal of Henan Polytechnic University( Natural Science), doi: 10.16186/j.cnki.1673-9787.2025040020.

现代珠江三角洲平原螃蟹遗迹与物化条件的响应关系及对古地理的指示(网络首发)

王媛媛 ^1，2，张亚斌 ¹，苗苗 ¹，张国成 ^1，2

（1.河南理工大学 资源与环境学院，河南 焦作 454000；2.河南理工大学 河南省生物遗迹与成矿过程国际联合实验室，河南 焦作 454000）

摘要: 目的 遗迹化石能为古环境重建提供关键信息，现代生物遗迹的深入研究对利用其作为古环境重建指标至关重要。通过分析现代珠江三角洲平原螃蟹遗迹特征与粒度、TOC、盐度及浑浊度的关系，为古环境重建提供实证依据。 方法 本文采用实地取样、实验室测试分析、CT扫描及三维重构等方法，对珠江三角洲平原92个取样点的粒度、TOC含量、盐度和浑浊度等物化条件及螃蟹遗迹特征进行研究。 结果 螃蟹遗迹空间分布规律明显，南部靠近海岸和河口区域生物扰动程度高，北部和西部大多无显著扰动迹象。粒度、TOC含量、盐度和浑浊度均影响螃蟹遗迹扰动密度，且各因素相互交织，如螃蟹偏好泥质或砂质（细粉砂和粗粉砂）基质，该基质中有机碳含量较高；盐度变化影响螃蟹种类分布，进而影响扰动密度；适度浑浊度利于螃蟹生存，过高则不利。 结论 现代珠江三角洲平原螃蟹遗迹分布受多种物化条件共同影响，对古三角洲平原遗迹相研究及古环境重建具有重要意义，通过分析螃蟹遗迹特征可推断古代水体盐度、水流强度和沉积环境稳定性等，助力理解古三角洲平原形成和演化过程，并丰富了已有的三角洲平原遗迹学和现代平原沉积学资料。

关键词: 珠江三角洲平原；遗迹学；螃蟹生物遗迹；物理化学条件

中图分类号：Q958.1

doi: 10.16186/j.cnki.1673-9787.2025040020

基金项目: 国家自然科学基金面上项目（42172130）；河南省本科高校青年骨干教师培养计划（2023GGJS055）

收稿日期：2025-04-09

修回日期：2025-06-17

网络首发日期：2025-09-02

The response relationship between crab traces and Physicochemical Stresses in the modern Pearl River Delta plain and its indication to paleogeography (Online)

WANG Yuanyuan^1，2, ZHANG Yabin¹, MIAO Miao¹, ZHANG Guocheng^1，2

（1. Institute of Resource and Environment, Henan Polytechnic University, Jiaozuo 454000, Henan, China；2. Henan International Joint Laboratory of Biogenic Traces and Sedimentary Minerals, Henan Polytechnic University, Jiaozuo 454000, Henan, China）

Abstract: Objectives Trace fossils provide critical information for paleoenvironmental reconstruction. In-depth study of modern biological traces is crucial for using them as indicators of paleoenvironmental reconstruction. By analyzing the relationship between the characteristics of crab traces in the modern Pearl River Delta Plain and grain size, TOC, salinity, and turbidity, this study aims to provide empirical evidence for paleoenvironmental reconstruction. Methods Field sampling, laboratory testing, CT scanning, and 3D reconstruction were employed. Grain size, TOC content, salinity, turbidity, and crab trace characteristics were investigated at 92 sampling sites across the delta plain. Results Crab traces showed clear spatial distribution patterns: high bioturbation occurred in southern coastal and estuarine zones, while minimal disturbance was observed in northern and western areas. Grain size, TOC, salinity, and turbidity all influenced crab trace density, with factors being interconnected: Crabs preferred muddy or sandy substrates (fine silt and coarse silt) with higher TOC; Salinity variations affected crab species distribution and thus bioturbation density; Moderate turbidity favored crab survival while excessive levels were detrimental. Conclusions The distribution of modern crab traces in the Pearl River Delta plain is co-influenced by multiple physicochemical conditions. This study holds significance for interpreting deltaic paleoenvironmental reconstruction and ichnofacies. Analysis of crab trace characteristics enables inferences about paleosalinity, hydrodynamic energy, and depositional stability, aiding reconstruction of deltaic evolution while enriching ichnological and sedimentological databases.

Key words：The Pearl River Delta Plain; ichnology; crab biological traces; physical and chemical conditions

CLC: Q958.1