Maritime construction site selection from the perspective of ecological protection: The relationship between the Dalian offshore airport and spotted seals (Phoca largha) in China based on the noise pollution

Due to the fragility and sensitivity of the marine environment, marine construction of an enormous scale would have a huge influence on the marine ecosystem. Thus, the influence of noise pollution of alternative airport sites on spotted seals (Phoca largha) was analysed by investigating the activity levels of spotted seals in engineering areas in this paper, and scientific results were obtained. However, studies should examine the effects of long-term noise on spotted seals. In any case, an effective way to fundamentally protect the marine ecosystem is to select sites for marine construction that are far away from the sensitive areas of marine organisms and to reduce the overall size and number of marine construction sites in the world. The results of this paper can provide a reference for marine construction in other areas, such as offshore airports, offshore drilling platforms and offshore wind farms.