A Perspective on Probing Coral Resilience to Climate and Environmental Changes Using Stable Isotopes of Bio-Utilized Metal Elements

• Published in: Journal of Geophysical Research: Biogeosciences
• Main Authors: Chen, Xuefei, Deng, Wenfeng, Xiao, Hangfang, Guo, Yangrui, Wei, Gangjian
• Format: Report
• Language: English
• Published: 2024
• Subjects: Environmental Sciences & Ecology; Geology; coral reef; metal stable isotopes; bio-utilized elements; coral resilience; Ocean acidification
• Online Access: http://ir.gig.ac.cn/handle/344008/76128; http://ir.gig.ac.cn/handle/344008/76129; https://doi.org/10.1029/2023JG007656

In the face of diverse challenges like global warming, ocean acidification, and human activities, the world's coral reefs are confronting a severe ecological crisis. Understanding the historical coevolution of corals with their environment and their resilience to current climate change is crucial for protecting these ecosystems and predicting their future. In this context, metal stable isotopes in corals present a novel and alternative methodology. Their significant fractionation during coral biological processes, persistent presence in coral skeletons, and relatively straightforward sources make them a valuable tool. However, the complexity of coral biology necessitates a deeper investigation into the fundamental mechanisms behind the isotopic fractionation of these biologically utilized metal elements. A comprehensive and systematic study of the roles of metal stable elements in coral biological processes is essential. This includes examining the fractionation of metal isotopes across different parts of the corals, such as tissues, zooxanthellae, and skeletons. To achieve these goals, multidisciplinary collaborations are essential. They should focus on several key areas: interpreting metal stable isotopes data in the context of coral physiology and ecology; conducting controlled laboratory experiments on coral cultivation; engaging in comparative studies with inorganically precipitated aragonites; and developing a holistic understanding within the framework of coral biomineralization models. Coral reefs around the world are facing serious threats from global warming, ocean acidification, and human activities. Understanding how corals have historically adapted to the environment and climate changes can provide useful information for protecting coral reefs and predicting their future. An innovative approach to this is examining stable isotopes of specific metal elements found in corals. These isotopes act as long-lasting markers that can trace coral life cycles and reveal how corals adjust to changing climates ...