“As we kept sampling, we kept seeing more diversity and more bacteria,” says marine microbiologist Pierre Galand.
, collected at 99 reefs across the Pacific Ocean. Their study found that each genus of coral was associated with a distinct species of. This suggests that the corals evolved a strong relationship with their bacteria over time and that the bacteria are useful to the corals, says Galand, who was also involved in this study.
The researchers also collected data that will allow them to study the links between physiological signs of stress in coral and microbial communities and factors such as water quality and temperature. The 100,000-kilometre voyage took in 249 Pacific Ocean locations including Indonesia, Japan and Papua New Guinea.Tara Pacific’s 100,000-km research journey is one of a relatively small number of seaborne scientific expeditions of this scale and ambition.
The ship had a laboratory to analyse the physical and chemical parameters of water samples such as temperature and pH. Coral and fish tissue samples were frozen and stored on board, then shipped every six months or so to labs on land for genetic sequencing and analysis.
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