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Press release | Biodiversity | Climate | Environment

Tara PACIFIC 2016-2018 - Coral reefs biodiversity facing climate change

​The research schooner Tara will leave her home port of Lorient on May 28th 2016 for a new expedition in the Asian Pacific. The boat will sail nearly 100,000 km around the Pacific Ocean for more than two years. The interdisciplinary team of scientists aboard, coordinated by the CNRS and the Scientific Centre of Monaco (CSM), will examine in a new way the biodiversity of coral reefs and their evolution in response to climate change and human activities. This adventure is sponsored by the CNRS, PSL, CEA, CSM and many other public and private partners.

Published on 15 April 2016

​Coral reefs cover less than 0.2% of the oceans' surface, yet they include nearly 30% of known marine biodiversity. Their health is crucial to the diversity of species, and also for humanity. Studying this fragile and endangered ecosystem is a priority since a large number of reefs have been disappearing in recent years.

From east to west and from south to north, Tara will criss-cross the Pacific Ocean to explore the hidden diversity of coral reefs and gain a better understanding of their capacity to adapt to climate change. From the Panama Canal to the archipelago of Japan (2016-2017), from New Zealand to China (2017-2018), the schooner will traverse 11 time zones of the world's largest ocean, and visit the most remote islands and reefs.

A novel approach to reef biodiversity

This expedition is unique in that it will cover such a huge geographical area – the Pacific Ocean – where over 40% of the world's coral reefs are concentrated. A study on this scale has never before been accomplished.

According to Serge Planes, CNRS researcher and scientific director of the expedition, “Tara Pacific will explore each reef 's hidden biodiversity – genomic, genetic, viral and bacterial – in order to compare it with the biodiversity of the surrounding body of water. Our goal is to get a real idea of the overall diversity of a coral colony.” This approach will give us new information concerning the still-unknown role of biological, chemical and physical parameters in the life of coral colonies and their ability to adapt to environmental change.
The Tara Pacific expedition will traverse a very wide gradient of biodiversity, culminating in the “Coral Triangle” of Southeast Asia. During the expedition, 40 different archipelagos will be studied, each in exactly the same way, so as to detect variations in the presence of 3 reef species: 2 corals and 1 small invertebrate in the hydroid family. Adopting a comparative and interdisciplinary approach, scientists will review the recent past of coral colonies to observe the contemporary evolution of the reefs, and to envisage the future, especially through computer simulations.

Besides the state of health of each reef and its biodiversity at different levels, the scientific team will focus on the capacities of resistance, adaptation and resilience of the reef ecosystems. A last aspect of our study will focus on the potential applications of coral biology to medical research.


Educate and inform on environmental issues

“The scientific community needs new data, but local and international groups need this information too. Tara will contribute to a better understanding of issues affecting the reefs, these cradles of biodiversity so important for the future of some populations, especially on small islands”, says Etienne Bourgois, President of the Tara Expeditions Foundation.
The Tara Expeditions Foundation will use this expedition to inform people in the political and business worlds, to raise public awareness about the most pressing environmental challenges and problems faced by populations that depend on the ocean's good health. Many stopovers in the Pacific and in Asia will allow us to share information on environmental issues with as broad a public as possible.

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