Department of Civil and Environmental Engineering, Faculty of Engineering, University of Miyazaki, Gakuen Kibanadai-Nishi 1-1, Miyazaki, 889-2192, Japan.
Sci Rep. 2021 Jun 1;11(1):11496. doi: 10.1038/s41598-021-91066-w.
On recreational sandy beaches, there are guidelines for the management of bacterial pollution in coastal waters regarding untreated sewage, urban wastewater, and industrial wastewater. However, terrestrial plant debris on coastal beaches can be abundant especially after floods and whilst it has rarely been considered a concern, the bacterial population associated with this type of pollution from the viewpoint of public health has not been adequately assessed. In this study, microbes associated with plant debris drifting onto Kizaki Beach in Japan were monitored for 8 months throughout the rainy season, summer, typhoon season, and winter. Here we show that faecal-indicator bacteria in the plant debris and sand under the debris were significantly higher than the number of faecal bacteria in the sand after a 2015 typhoon. When we focused on specific pathogenic bacteria, Brevundimonas vesicularis and Pseudomonas alcaligenes were commonly detected only in the plant debris and sand under the debris during the survey period. The prompt removal of plant debris would therefore help create safer beaches.
在娱乐性沙滩上，针对未经处理的污水、城市废水和工业废水，已经制定了沿海海域细菌污染管理指南。然而，沿海沙滩上的陆生植物碎屑可能非常丰富，特别是在洪水过后，尽管人们很少关注这一点，但从公共卫生的角度来看，尚未充分评估与这种污染相关的细菌种群。在这项研究中，监测了日本 Kizaki 海滩上漂流的植物碎屑中与微生物相关的情况，整个雨季、夏季、台风季节和冬季共监测了 8 个月。在这里，我们表明，2015 年台风过后，植物碎屑和碎屑下的沙子中的粪便指示菌显著高于沙子中的粪便细菌数量。当我们关注特定的致病菌时，在调查期间，只有在植物碎屑和碎屑下的沙子中才经常检测到泡囊短波单胞菌和产碱假单胞菌。因此，及时清除植物碎屑将有助于创造更安全的海滩。
