Jun Yasumoto, Mariko Iijima, Akira Iguchi, Takashi Nakamura, Ryogo Takada, Mina Yasumoto-Hirose, Yuichi Iwasaki, Tetsuo Yasutaka, Kanami Mori-Yasumoto, Ryuichi Shinjo, Ryota Ide, Alice Yamazaki, Nanami Mizusawa, Yoshikazu Ohno, Atsushi Suzuki, Shugo Watabe, Ko Yasumoto
{"title":"Coral Decline Linked to Exchangeable Phosphate in Seawater from Coastal Calcareous Sediments, as Evidenced in Sekisei Lagoon, Japan","authors":"Jun Yasumoto, Mariko Iijima, Akira Iguchi, Takashi Nakamura, Ryogo Takada, Mina Yasumoto-Hirose, Yuichi Iwasaki, Tetsuo Yasutaka, Kanami Mori-Yasumoto, Ryuichi Shinjo, Ryota Ide, Alice Yamazaki, Nanami Mizusawa, Yoshikazu Ohno, Atsushi Suzuki, Shugo Watabe, Ko Yasumoto","doi":"10.1007/s10126-025-10412-5","DOIUrl":null,"url":null,"abstract":"<div><p>Coral reefs are essential for biodiversity and ecosystem services, yet they face threats like bleaching and reduced resilience due to rising seawater temperatures and land-based pollution. This study examined phosphate accumulation in calcareous sediments and its relationship with coral populations in Sekisei Lagoon, Okinawa Islands, Japan. Sediment samples from 117 sites were analyzed for exchangeable phosphate in seawater (EPS), which could be released from the calcareous sediments. The EPS levels were negatively correlated with coral densities for adults (<i>Pocillopora</i>, <i>Acropora</i>, <i>Galaxea</i>, <i>Favia</i>, <i>Favites</i>, <i>Goniastrea</i>, and <i>Cyphastrea</i>) and juveniles (<i>Pocillopora</i>, <i>Montipora</i>, <i>Acropora</i>, <i>Galaxea</i>, <i>Favia</i>, <i>Favites</i>, and <i>Goniastrea</i>). No significant correlation was found for <i>Porites</i> or <i>Millepora</i>. The EPS levels were positively correlated with coral bleaching and the abundance of Sargassaceae algae. High coastal EPS levels suggest main pollution sources from livestock and shrimp farming. The threshold above which EPS impacts coral bleaching and density was estimated at 0.3–0.7 µg/g, providing insights for coral reef conservation.</p></div>","PeriodicalId":690,"journal":{"name":"Marine Biotechnology","volume":"27 2","pages":""},"PeriodicalIF":2.6000,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Marine Biotechnology","FirstCategoryId":"99","ListUrlMain":"https://link.springer.com/article/10.1007/s10126-025-10412-5","RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"BIOTECHNOLOGY & APPLIED MICROBIOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
Coral reefs are essential for biodiversity and ecosystem services, yet they face threats like bleaching and reduced resilience due to rising seawater temperatures and land-based pollution. This study examined phosphate accumulation in calcareous sediments and its relationship with coral populations in Sekisei Lagoon, Okinawa Islands, Japan. Sediment samples from 117 sites were analyzed for exchangeable phosphate in seawater (EPS), which could be released from the calcareous sediments. The EPS levels were negatively correlated with coral densities for adults (Pocillopora, Acropora, Galaxea, Favia, Favites, Goniastrea, and Cyphastrea) and juveniles (Pocillopora, Montipora, Acropora, Galaxea, Favia, Favites, and Goniastrea). No significant correlation was found for Porites or Millepora. The EPS levels were positively correlated with coral bleaching and the abundance of Sargassaceae algae. High coastal EPS levels suggest main pollution sources from livestock and shrimp farming. The threshold above which EPS impacts coral bleaching and density was estimated at 0.3–0.7 µg/g, providing insights for coral reef conservation.
期刊介绍:
Marine Biotechnology welcomes high-quality research papers presenting novel data on the biotechnology of aquatic organisms. The journal publishes high quality papers in the areas of molecular biology, genomics, proteomics, cell biology, and biochemistry, and particularly encourages submissions of papers related to genome biology such as linkage mapping, large-scale gene discoveries, QTL analysis, physical mapping, and comparative and functional genome analysis. Papers on technological development and marine natural products should demonstrate innovation and novel applications.