Ocean warming and acidification modify top-down and bottom-up control in a tropical seagrass ecosystem

• Published in: Scientific Reports
• Main Authors: Listiawati, Vina, Kurihara, Haruko
• Other Authors: Japan Society for the Promotion of Science, Marine Pew Fellow
• Format: Article in Journal/Newspaper
• Language: English
• Published: Springer Science and Business Media LLC 2021
• Subjects: Multidisciplinary; Ocean acidification
• Online Access: http://dx.doi.org/10.1038/s41598-021-92989-0; http://www.nature.com/articles/s41598-021-92989-0.pdf; http://www.nature.com/articles/s41598-021-92989-0

Abstract Seagrass ecosystem is one of the most productive ecosystems in coastal waters providing numerous ecological functions and supporting a large biodiversity. However, various anthropogenic stressors including climate change are impacting these vulnerable habitats. Here, we investigated the independent and combined effects of ocean warming and ocean acidification on plant–herbivore interactions in a tropical seagrass community. Direct and indirect effects of high temperature and high p CO 2 on the physiology of the tropical seagrass Thalassia hemprichii and sea urchin Tripneustes gratilla were evaluated. Productivity of seagrass was found to increase under high p CO 2 , while sea urchin physiology including feeding rate decreased particularly under high temperature. The present study indicated that future climate change will affect the bottom-up and top-down balance, which potentially can modify the ecosystem functions and services of tropical seagrass ecosystems.