Definition: In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.
Input: WASHINGTON Scientists on Thursday unveiled the most comprehensive analysis ever undertaken of the world's ocean plankton, the tiny organisms that serve as food for marine creatures such as the blue whale, but also provide half the oxygen we breathe. 
  
 The researchers spent 3-1/2 years aboard the schooner Tara, taking 35,000 samples of plankton from 210 sites globally, determining the distribution of the organisms, tracking how they interact with one another and carrying out genetic analyses. 
  
 Plankton include microscopic plants and animals, fish larvae, bacteria, viruses and other microorganisms that drift in the oceans. 
  
 "Plankton are much more than just food for the whales," said Chris Bowler, a research director at France's National Center for Scientific Research, and one of the scientists involved in the study published in the journal Science. 
  
 "Although tiny, these organisms are a vital part of the Earth's life support system, providing half of the oxygen generated each year on Earth by photosynthesis and lying at the base of marine food chains on which all other ocean life depends." 
  
 The scientists conducted the largest DNA sequencing effort ever done in ocean science, pinpointing around 40 million plankton genes, most previously unknown. 
  
 Much of the plankton was more genetically diverse than previously known. However, the genetic diversity of marine viruses was much lower than anticipated. 
  
 By removing carbon dioxide from the atmosphere and converting it into organic carbon via photosynthesis, plankton provide a buffer against the increased carbon dioxide being generated by the burning of fossil fuels, Bowler said. 
  
 Tara Expeditions Executive Director Romain Troublé said the schooner sailed about 87,000 miles (140,000 km) during the research voyage. 
  
 Those aboard endured hardships such as being locked for 10 days in Arctic ice, storms in the Mediterranean Sea and in the Magellan Straight, and sailing through the Gulf of Aden with protection from the French navy against pirates. 
  
 The scientists found that most of the interactions between plankton organisms were parasitic. They also found evidence for widespread dispersal of viruses in the oceans. 
  
 "Since the most numerous members of the plankton are bacteria, the majority of viruses in the ocean are thought to infect bacteria," University of Arizona oceanographer Jennifer Brum, another of the researchers, said. 
  
 "A good way of thinking about this is that there are roughly 200 million viruses in every mouthful of seawater, and most of those viruses are infecting the roughly 20 million bacteria found in every mouthful of seawater." 
  
 (Reporting by Will Dunham. Editing by Andre Grenon) ||||| Image copyright Christian Sardet/Tara Oceans Image caption Planktonic organisms such as these single-celled creatures are found throughout the oceans 
  
 The hidden world of the ocean's tiniest organisms has been revealed in a series of papers published in the journal Science. 
  
 An international team has been studying samples of plankton collected during a three-year global expedition. 
  
 They have so far found 35,000 species of bacteria, 5,000 new viruses and 150,000 single-celled plants and creatures. 
  
 They believe that the majority of these are new to science. 
  
 Dr Chris Bowler, from the National Centre for Scientific Research (CNRS), in Paris, told BBC News: "We have the most complete description yet of planktonic organisms to date: what's there in terms of viruses, bacteria and protozoa - we finally have a catalogue of what is present globally." 
  
 Image copyright Noan Le Bescot/Tara Oceans Image caption This tiny crustacean was found in a sample taken in the South Pacific 
  
 Planktonic organisms are minute, but together they make up 90% of the mass of all of the marine life in the oceans. 
  
 They include viruses, bacteria, single-celled plants and creatures (protozoa). 
  
 They form the very base of the food chain, and produce - through photosynthesis - half of the oxygen we breathe. 
  
 However, until now, little has been known about this unseen ocean ecosystem. 
  
 The Tara expedition, primarily funded by the French fashion designer Agnes B, set out to change that. 
  
 Image copyright M Ormestad/Kahikai/Tara-Oceans Image caption Many of the organisms are new to science 
  
 Image copyright C Guiguand/Tara Oceans Image caption So far the team has analysed 579 of the 35,000 samples that were collected 
  
 An international team of scientists took part in expeditions onboard the Tara schooner between 2009 and 2013. 
  
 It sailed 30,000km across the world's oceans, with researchers collecting 35,000 samples, taking them from the very top layers of the ocean down to 1,000m below the waves. 
  
 The project has cost about 10m euros. 
  
 New viruses 
  
 So far the scientists have analysed 579 of the 35,000 samples collected, presenting the results in five scientific papers. 
  
 Dr Bowler said the research was transforming our understanding of these ocean communities. 
  
 "For the viruses, we describe about 5,000 virus communities - only 39 of these were previously known. 
  
 "And for protists - unicellular organisms - we estimate something like 150,000 different taxa. 
  
 "There are about 11,000 formally described species of plankton - we have evidence for at least 10 times more than that." 
  
 Image copyright Luis Gutierrez/Tara Oceans Image caption The analysis has revealed that many of the organisms are sensitive to temperature 
  
 Image copyright C Sardet/Tara Oceans Image caption The researchers also looked at how the different organisms interacted 
  
 Image copyright Christian Sardet/Tara Oceans Image caption Planktonic organisms such as these tiny jellyfish and fish are found throughout the oceans 
  
 Of the 35,000 microbes found, most had been seen before, however a genetic analysis of them revealed many new genes. 
  
 "We have 40 million genes - about 80% of which are new to science," explained Dr Bower. 
  
 The researchers also analysed how plankton communities are organised. 
  
 "We have thrown all of these together to see who interacts with whom," said Dr Bower. 
  
 "We now have a big dataset where we can ask: 'who do you always find with someone else?' or 'who do you never find with someone else'. 
  
 "This helps us to describe symbiosis and interactions that go beyond grazing and predator-prey relationships." 
  
 'Enormous' database 
  
 The researchers have found that many of the organisms, particularly the bacteria, are sensitive to temperature. 
  
 Dr Bowler said: "It is temperature that determines what sort of communities of organisms we find. If we look at our data and we see what organisms are there, we can predict with 97% probability the temperature of the water they are living in. 
  
 "These organisms are most sensitive to temperature, more than anything else, and with changing temperatures as a result of climate change we are likely to see changes in this community." 
  
 The researchers say that this scientific analysis is just the beginning. 
  
 They are making their findings freely available to the scientific community to gain a better understanding of this vital but unseen underwater world. 
  
 Dr Bowler continued: "The amount of data we have released is already enormous; it is one of the largest databases of DNA available to the scientific community. But we've analysed perhaps 2% of the samples we have collected throughout the world - so there is a huge amount of work to do in the future to understand even more about the functioning of these marine ecosystems and the importance of that for the wellbeing of the planet. 
  
 "So it's really just the beginning of the study." 
  
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Output:
From 2009 to 2013, the 110-foot schooner Tara sailed around the world, collecting plankton samples from more than 200 sites, some as deep as 6,500 feet down in the ocean, Science magazine reports. Fighting volatile weather, funding issues, and even the threat of pirates, the Tara expedition team still managed to cull an impressive database of plankton, the beings that produce half the planet's oxygen and include "microscopic plants and animals, fish larvae, bacteria, viruses, and other microorganisms," per Reuters. What the samples revealed, per the BBC: about 5,000 virus "communities," 35,000 bacteria species, and a stunning 150,000 protozoa—single-celled plants and creatures. Scientists believe most of the discoveries in the exhaustively culled database have never been IDed before. "There are about 11,000 formally described species of plankton—we have evidence for at least 10 times more than that," Dr. Chris Bowler of Paris' National Center for Scientific Research tells the BBC. And what scientists have put under the microscope is only a small percentage of their complete inventory: They've pored over just 579 of the 35,000 or so plankton samples collected, the broadcaster reports. They also completed what Tara Expeditions is calling the "largest DNA sequencing effort ever done for ocean science" and found 40 million genes, only 20% of which were previously known. One (mostly) common denominator among many of the collected organisms: They're sensitive to changes in the mercury. "With changing temperatures as a result of climate change, we are likely to see changes in this community," Bowler says. (Read the latest on another amazing discovery from the deep.)