The current scenario of global change and the increase of human population in coastal areas is leading to the introduction of numerous man-made structures into the coastal environment. Those artificial structures provide different services at the expenses of habitat loss and a range of widely documented ecological impacts. Limpets are keystone species that are worldwide established in these artificial habitats. However, little is known about the impact of artificial coastal defence structures on the diet of limpets. Therefore, the aim of this study was to evaluate if different kinds of artificial structures (cubes, rip-raps, seawalls and tetrapods) across a geographical gradient (western to eastern Alboran Sea), could affect the food consumption of the limpet Patella caerulea by using carbon and nitrogen isotopes analysis. Our results suggested that for certain localities, there was a shift in the trophic niche of P. caerulea inhabiting artificial substrates in comparison with the nearest natural rocky shore. However, patterns were not consistent for all localities and different types of artificial structures, which reinforces the importance of considering local scales for conservation and management purposes. Finally, ${\delta }^{15}$N ratio in P. caerulea is a good indicator of eutrophication at regional scales, by showing a gradient of enrichment in the limpet tissues from oligotrophic to eutrophic waters within the Alboran Sea.

当前全球变化和沿海地区人口增加的情况导致将许多人造结构引入沿海环境。这些人工结构以丧失栖息地和一系列广泛记录的生态影响为代价提供了不同的服务。帽毛是在这些人工栖息地中世界范围内建立的关键物种。但是，关于人工沿海防御结构对贝类食物的影响知之甚少。因此，本研究的目的是评估跨地理梯度（西至东阿尔博兰海）的不同种类的人工结构（立方体，翻录，海堤和四足动物）是否会影响帽贝Pat虫的食物消耗通过使用碳和氮同位素分析。我们的结果表明，在某些地方，与最近的天然岩石海岸相比，居住在人工基质上的南美白杨的营养位发生了变化。但是，模式在所有地区和不同类型的人工结构中并不一致，这进一步强调了出于保护和管理目的考虑当地规模的重要性。最后，${\delta }^{15}$N比P.翠是富营养化的区域尺度的良好指标，通过显示从贫营养的阿尔沃兰海内水域富营养化富集在帽贝组织的梯度。