Tara Oceans

Tara Oceans is a global multidisciplinary scientific expedition that sailed from 2009 to 2013 to study planktonic ecosystems across the world's oceans. Conceived as a collaboration between European research institutes, foundations, museums, and universities, the project combined oceanography, genomics, microscopy, and bioinformatics to generate one of the largest marine plankton datasets. The campaign sampled diverse marine provinces from polar to tropical regions to map plankton diversity, distribution, and ecological interactions.

Background and expedition

The expedition was initiated by foundations and institutions connected to polar exploration and marine research including the Fondation Tara Océan, CNRS, EPFL, Muséum national d'Histoire naturelle, European Molecular Biology Laboratory, and the Columbia University research community. The sailing vessel departed from ports associated with Marseille and conducted transects across basins such as the Mediterranean Sea, Atlantic Ocean, Pacific Ocean, Indian Ocean, and high-latitude sectors near Arctic Ocean and Southern Ocean. Field campaigns interacted with national programs including the NOAA office networks, Scripps Institution of Oceanography, Plymouth Marine Laboratory, and regional observatories like the Station Biologique de Roscoff and Long-Term Ecological Research Network. The logistical effort involved coordination with agencies such as European Commission initiatives, the UNESCO Intergovernmental Oceanographic Commission, and port authorities in cities like Cape Town, Valparaiso, Sydney, and Rio de Janeiro.

Research objectives and methodology

Primary objectives included characterizing planktonic biodiversity, mapping functional genes, and elucidating trophic networks using integrated methodologies from institutions like EMBL-EBI, Max Planck Society, and Institut Pasteur. Sampling protocols combined methods developed by groups at Woods Hole Oceanographic Institution, Ifremer, and Stazione Zoologica Anton Dohrn using standardized nets, pumps, flow cytometers from manufacturers linked to academic labs, and in situ sensors derived from Argo float technology. Molecular workflows leveraged high-throughput sequencing platforms from Illumina, single-cell approaches pioneered at Broad Institute, and metabarcoding pipelines informed by work at Joint Genome Institute. Taxonomic identification incorporated imaging systems and automated microscopes used in projects at Natural History Museum, London and computational annotation linked to databases at GenBank, SILVA, PR2, and the Ocean Biogeographic Information System. Data management and bioinformatics integrated environments such as Galaxy, Zenodo, and the European Nucleotide Archive with analysis tools from the R Project for Statistical Computing and the Python ecosystem.

Major findings and datasets

Key discoveries included the high genetic novelty of marine plankton revealing many previously unknown lineages, ecological structuring by oceanic provinces, and the importance of viruses and protists in biogeochemical cycles—findings contextualized by comparative studies at Global Ocean Sampling Expedition, Census of Marine Life, and BioMarKs. Genomic surveys produced metagenomes, metatranscriptomes, and single-cell genomes archived alongside environmental metadata interoperable with standards from Genomic Standards Consortium and datasets deposited in repositories used by NCBI and EBI. Notable results reported links between plankton community composition and physical drivers examined in the tradition of Alfred Wegener Institute and Sverdrup-style oceanographic studies, while network analyses revealed keystone taxa echoing concepts from Keystone species research historically associated with Robert Paine. Viral diversity maps extended work from groups at Aaron Clauset-adjacent network biology labs and complemented virus-host interaction frameworks developed at Pasteur Institute teams. Datasets facilitated downstream analyses in macroecology like those by J. E. Smith-style syntheses and comparative biogeography influenced by Edward O. Wilson-inspired biodiversity theory.

Legacy and impact on marine science

The expedition catalyzed methodological convergence among institutions including EMBL, CNRS, Universidad de Barcelona, and University of Oxford, advancing omics-driven oceanography in line with initiatives such as the International Census of Marine Microbes and influencing programs like the Global Ocean Observing System. Its open-data ethos promoted interoperability with programs at PANGAEA and inspired follow-up projects like the BIOMASS and regional long-term monitoring supported by European Research Council grants and national science agencies such as Agence Nationale de la Recherche and National Science Foundation. The work has been cited by policy-oriented bodies including IPCC-related assessments and has informed conservation planning by entities such as IUCN and marine spatial planning efforts in jurisdictions collaborating with Convention on Biological Diversity frameworks. Educational outreach leveraged collaborations with museums like the Muséum national d'Histoire naturelle and public engagement networks including TED and documentary producers affiliated with National Geographic.

Collaborations and organization

Tara Oceans was organized through a consortium model linking academic groups, museums, and non-profit foundations: partners included Fondation Tara Océan, CNRS, EMBL, Muséum national d'Histoire naturelle, Institut Pasteur, EPFL, Utrecht University, Sorbonne University, University of Copenhagen, University of Tokyo, Peking University, University of Cape Town, and industry collaborators such as sequencing providers and sensor manufacturers. Scientific leadership featured cross-disciplinary principal investigators from laboratories at Laboratoire d'Océanographie de Villefranche, Scripps Institution of Oceanography, LMU Munich, and Max Planck Institute for Marine Microbiology. Funding and governance involved foundations like Nikon Foundation-style philanthropic models, national funding agencies including CNRS funding structures, the European Research Council, and partnerships with museums for curation at institutions such as the Natural History Museum, Paris and specimen archiving at facilities affiliated with Smithsonian Institution. The project's collaborative data platforms integrated contributions from bioinformatics centers at Pasteur Institute, EMBL-EBI, and national computing infrastructures like PRACE and XSEDE.

Category:Oceanographic expeditions