Coral reefs hold immense economic, ecological, and cultural value but are severely threatened by climate change and other local stressors, such as coastal development projects. In Miami, Florida and the Cayman Islands, two locations with vibrant coral reef ecosystems, large scale dredging port projects have either been planned or implemented. Environmental disputes emerged during both projects due to the uncertainty over ecological risks of dredging on coral ecosystems. In this research, a refined version of the Narrative Policy Framework is employed to understand how narratives used by stakeholders, both supportive of and opposed to these dredging projects, influenced the ultimate implementation status and impacts therein. The findings show that supporters of the port projects place themselves as heroes in their narratives, in which they advocate for economic prosperity while simultaneously presenting their side as protecting the environment through actions with high technological certainty. On the other hand, opponents of the port projects emphasize the environmental risks involved by contesting the science presented. Opponents portray supporters as villainous for potential dredging impacts and for overstating technological certainty. Across the cases, this paper finds the heterogeneity and dynamism in the use of science and symbols cannot be predicted by supporters or opponents of the projects but rather, are adaptable to either cause readily. As environmental disputes increase along with the impacts of climate change, understanding the narratives that coalitions of stakeholders employ to advocate for preferred policies will be important for global environmental policy-makers.

珊瑚礁具有巨大的经济、生态和文化价值，但受到气候变化和其他当地压力因素（如沿海开发项目）的严重威胁。在迈阿密、佛罗里达州和开曼群岛，这两个拥有充满活力的珊瑚礁生态系统的地方，大规模的疏浚港口项目已经计划或实施。由于疏浚珊瑚生态系统的生态风险的不确定性，这两个项目都出现了环境纠纷。在这项研究中，使用了一个改进版的叙事政策框架，以了解支持和反对这些疏浚项目的利益相关者使用的叙事如何影响其中的最终实施状态和影响。调查结果表明，港口项目的支持者在他们的叙述中将自己视为英雄，他们在其中倡导经济繁荣，同时通过具有高度技术确定性的行动来保护环境。另一方面，港口项目的反对者强调了对所提出的科学提出质疑所涉及的环境风险。反对者将支持者描述为潜在的疏浚影响和夸大技术确定性的恶棍。在这些案例中，本文发现科学和符号使用的异质性和活力是项目的支持者或反对者无法预测的，而是很容易适应任何一个原因。随着环境纠纷的增加以及气候变化的影响，