Singapore researchers help to map unexplored seafloor in Indian Ocean

Key Concepts

• Seamounts: Underwater mountains, often volcanic in origin, that do not break the surface of the water.
• Remotely Operated Vehicle (ROV): An underwater robot equipped with cameras, arms, and sensors, used for exploration, surveying, and specimen collection.
• Biodiversity: The variety of life in a particular habitat or ecosystem.
• Biogeochemical Cycles: The pathways by which chemical elements and energy move through the biotic and abiotic components of ecosystems.
• High Seas Treaty: An international agreement aimed at protecting marine biodiversity in areas beyond national jurisdiction.

Monsoon Rise Expedition: Mapping the Underexplored Indian Ocean

The Monsoon Rise Expedition, a collaborative effort led by the US nonprofit OceanX and the National University of Singapore (NUS), successfully mapped approximately 8,000 square kilometers of seafloor in a previously underexplored region of the eastern Indian Ocean. This mission involved scientists from Singapore, Indonesia, Vietnam, Thailand, and Fiji, utilizing state-of-the-art technology to investigate deep-sea ecosystems at depths of up to 5,000 meters.

Key Findings and Discoveries

• New Seafloor Mapped: Approximately 70% of the mapped seafloor is new to science, highlighting the vastness of unexplored ocean regions.
• Discovery of Seamounts: The expedition specifically targeted two seamounts, which are underwater mountains. One seamount's summit was found to be 1,200 meters below the surface, while the other was at 1,600 meters. The bases of these seamounts extended to depths of 4,000 meters or more, indicating their significant size and rugged topography.
• Thriving Ecosystems: The mission revealed thriving ecosystems in the region, with the discovery of rare sharks and deep-sea corals.
• Biodiversity Assessment: A primary objective was to understand the biodiversity and components of the deep-sea ecosystem. Scientists collected extensive video footage via ROVs and landers, as well as specimens, which will be analyzed to create a comprehensive picture of life in the area.

Technological Advancements and Methodologies

The expedition leveraged advanced technology, including:

• Acoustic Equipment: High-quality acoustic systems on the ship enabled detailed seafloor mapping.
• Remotely Operated Vehicle (ROV): The ROV was a crucial tool, equipped with multiple cameras for surveying, arms for manipulating objects, and sensors for measuring environmental parameters. It was instrumental in reaching the deepest parts of the survey area (up to 5,000 meters) and collecting specimens.
• Landers: These were also used for data collection and specimen retrieval.

Significance and Future Implications

• Conservation Efforts: The mission's findings are vital for informing conservation strategies. Dr. Jose Christopher Escano Mendoza, deputy chief scientist of the mission, emphasized, "The more we know about what at this point we do not know, the better we will be able to conserve in advance of possibly losing these valuable habitats."
• Understanding Deep-Sea Ecosystems: The deep sea plays a critical role in regulating the planet's climate and sustaining biogeochemical cycles essential for life. Understanding these ecosystems is therefore crucial for human survival.
• Regional Collaboration: The expedition exemplifies a new era of regional collaboration in ocean exploration, aligning with the spirit of the High Seas Treaty. The collected information is intended to be shared globally.
• Addressing the Knowledge Gap: The expedition addresses the significant gap in our knowledge of the ocean floor, with only about 26% of the seafloor mapped in detail globally. This contrasts with our understanding of celestial bodies, as often stated, "we know more about the surface of the moon than the bottom of the sea here in our own planet."

Next Steps

The research team faces months, and likely years, of study ahead to analyze the vast amount of data and specimens collected. The findings will be disseminated through scientific journals and shared with international authorities, contributing to global oceanographic knowledge.

Conclusion

The Monsoon Rise Expedition represents a significant advancement in our understanding of the Indian Ocean's deep-sea environments. Through international collaboration and the deployment of cutting-edge technology, researchers have mapped previously unknown areas, discovered new life forms, and gathered crucial data that will inform future conservation efforts and our broader comprehension of the planet's vital marine ecosystems.