Earth:Tara expedition

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Short description: Oceanic research expeditions
The schooner TARA (Port Lay, Île de Groix, 2009).jpg
Schooner Tara.
History
French EnsignFrance
Name:
  • Antarctica
  • then Seamaster
  • currently Tara
Builder: SFCN Villeneuve-la-Garenne
In service: 1989
Homeport: Lorient, France
General characteristics
Type: Schooner
Displacement: 130 t (130 long tons; 290,000 lb)
Length: 36 m (118 ft)
Sampling devices and working areas on-board SV Tara are shown from the vessel's [a] side-view, [b] bird's-eye-view of the deck, and [c] inside-view. They consist of the [1] Continuous Surface Sampling System [CSSS]; [2] Rosette Vertical Sampling System [RVSS]; [3] wet lab and storage in liquid nitrogen; [4] High Volume Peristaltic pump [HVP-PUMP]; [5] dry lab; [6] oceanography engineers data acquisition and processing area; [7] winch; [8] video imaging area; [9] storage areas at room temperature; [10] storage areas at +4 °C and −20 °C; [11] MilliQ water system and AC-s system; [12] diving equipment, flowcytobot and ALPHA instruments; and [13] storage boxes. The flow of seawater from the continuous surface sampling system to the dry lab is shown in blue.[1]
Courtesy of the Tara Oceans Expedition

The Tara expedition is an oceanic research expedition.

The boat

Tara is a 36-metre (118 ft) aluminum-hulled schooner, formerly named "Antarctica" then "Seamaster".[2] Designed by the naval architects Olivier Petit and Luc Bouvet, built in France on the initiative of Jean-Louis Étienne, medical explorer, in 1989 the schooner Antarctica was used from 1991 to 1996 by Jean-Louis Étienne for scientific expeditions in Antarctica, at the Erebus volcano and then wintering at Spitzberg. Under its former name, it was owned by Peter Blake, who was shot and killed in 2001 by pirates while sailing Seamaster on the Amazon River.[2] Following Blake's death, the yacht was bought by Etienne Bourgois, renamed Tara and dedicated to environmental expeditions.[3]

Schooner Tara in Brest Harbour.

Expeditions

Tara Arctic

The polar schooner Tara set out to drift in the ice for approximately two years from its first departure, late in August 2006. The expedition met with interest in the oceanography community, especially in the context of the International Polar Year (2007–2008). Dubbed Tara Arctic, this voyage ended on February 23, 2008. It was part of the international DAMOCLES (Developing Arctic Modelling and Observing Capabilities for Long-term Environmental Studies) program.

Tara Oceans

In 2009, Tara started a new expedition, dubbed Tara Oceans.[4] It travelled around the world until 2013 to study CO2 capture by marine microorganisms such as plankton on a global scale. The costs of the expedition were €3 million per year, all from private funds. The expedition was primarily funded by the French fashion designer agnès b.,[5] however, it was a collaborative effort between the Tara Expeditions Foundation, the French National Center for Scientific Research (CNRS) and 17 other international partner institutions.[6] It was able to collect more than 35,000 planktonic samples from 210 stations in every major oceanic region, which through analyses revealed more than 40 million genes, most of which were new to science.[4][7]

The samples were analyzed using a combination of DNA sequencing and microscopy. Of the 40+ million genes identified, the two biggest match domains were 58.8% bacteria and 5.4% viruses. 27.7% were not able to be matched with any currently known domains of life.[8] This fact underscores the vast unknown biological components of the world’s oceans.

In addition to uncovering unknown marine biodiversity, the Tara Oceans Expedition helped us to understand the role of marine microbes in the global ecosystem, address the impacts of climate change on marine life and improve ocean conservation efforts.

One of the other goals of Tara Oceans was to allow open access archives of both raw and validated data sets to scientists around the world as quickly as possible.[1] Links to all of the data sets can be found at https://www.ebi.ac.uk/services/tara-oceans-data. As part of the expedition's public outreach efforts, a short series of documentary videos called The Plankton Chronicles which merged science and art was created by the Villefranche-sur-Mer Marine Station.[9]

Sampling route of the Tara Oceans Expedition (green track), showing station labels and areas (blue shade) where the annual mean oxygen concentration is <2 mL/L (WOA09), usually corresponding also to high CO2 concentration and low pH.[1]

Tara Mediterranean

Tara Mediterranean was the next expedition that took place over seven months in 2014. It traversed the entire Mediterranean Sea with the goal better understanding the sources, transport, distribution and characteristics of surface floating plastic.[10] One of the major discoveries was that of the 2000 samples taken on the cruise at 300 different sites, all of the samples contained plastic fragments.[11]

Tara Pacific

Tara Pacific began in May 2016. During this latest voyage Tara is studying coral reefs and plastic pollution.

See also

References

  1. ↑ 1.0 1.1 1.2 Pesant, S., Not, F., Picheral, M., Kandels-Lewis, S., Le Bescot, N., Gorsky, G., Iudicone, D., Karsenti, E., Speich, S., Troublé, R. and Dimier, C. (2015) "Open science resources for the discovery and analysis of Tara Oceans data". Scientific data, 2(1): 1–16. doi:10.1038/sdata.2015.23.
  2. ↑ 2.0 2.1 "Sir Peter Blake's former yacht sails into Whangarei". http://www.nzherald.co.nz/sport/news/article.cfm?c_id=4&objectid=11879133. 
  3. ↑ Ainsworth, Claire (5 September 2013). "Systems ecology: Biology on the high seas". Nature 501 (7465): 20–23. doi:10.1038/501020a. PMID 24005399. Bibcode: 2013Natur.501...20A. 
  4. ↑ 4.0 4.1 "Tara Oceans expedition yields treasure trove of plankton data". Science Daily (ScienceDaily). 21 May 2015. https://www.sciencedaily.com/releases/2015/05/150521143934.htm. Retrieved 17 August 2015. 
  5. ↑ Morelle, Rebecca (22 May 2015). "Ocean's hidden world of plankton revealed in 'enormous database'". BBC News. https://www.bbc.com/news/science-environment-32831814. 
  6. ↑ Sunagawa, Shinichi; Acinas, Silvia G.; Bork, Peer; Bowler, Chris; Eveillard, Damien; Gorsky, Gabriel; Guidi, Lionel; Iudicone, Daniele et al. (August 2020). "Tara Oceans: towards global ocean ecosystems biology" (in en). Nature Reviews Microbiology 18 (8): 428–445. doi:10.1038/s41579-020-0364-5. ISSN 1740-1534. PMID 32398798. https://www.nature.com/articles/s41579-020-0364-5. 
  7. ↑ "Tara Oceans expedition: researchers map the world of plankton". UNESCO (UNESCO). 26 May 2015. http://www.unesco.org/new/en/media-services/single-view/news/tara_oceans_expedition_researchers_map_the_world_of_plankton/#.VdHiDItRclI. Retrieved 17 August 2015. 
  8. ↑ Pierella Karlusich, Juan José; Ibarbalz, Federico M.; Bowler, Chris (2020-01-03). "Phytoplankton in the Tara Ocean" (in en). Annual Review of Marine Science 12 (1): 233–265. doi:10.1146/annurev-marine-010419-010706. ISSN 1941-1405. PMID 31899671. Bibcode: 2020ARMS...12..233P. https://www.annualreviews.org/doi/10.1146/annurev-marine-010419-010706. 
  9. ↑ "Plankton Chronicles" (in en-US). https://planktonchronicles.org/en/. 
  10. ↑ Pedrotti, Maria Luiza; Lombard, Fabien; Baudena, Alberto; Galgani, François; Elineau, Amanda; Petit, Stephanie; Henry, Maryvonne; Troublé, Romain et al. (2022-09-10). "An integrative assessment of the plastic debris load in the Mediterranean Sea" (in en). Science of the Total Environment 838 (Pt 1): 155958. doi:10.1016/j.scitotenv.2022.155958. ISSN 0048-9697. PMID 35580673. Bibcode: 2022ScTEn.838o5958P. https://www.sciencedirect.com/science/article/pii/S0048969722030558. 
  11. ↑ "The plastic plague in the Mediterranean | Tara Mediterranean" (in en-GB). https://fondationtaraocean.org/en/expedition/tara-mediterranean/. 

External links



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