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Latest Biological oceanography Stories

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2011-05-13 03:11:59

Scientists have known for two decades that sulfur compounds that are produced by bacterioplankton as they consume decaying algae in the ocean cycle through two paths. In one, a sulfur compound dimethylsulfide, or DMS, goes into the atmosphere, where it leads to water droplet formation "“ the basis of clouds that cool the Earth. In the other, a sulfur compound goes into the ocean's food web, where it is eaten and returned to seawater. What they haven't known is how sulfur is routed one...

2011-05-12 00:06:42

The urea cycle is a metabolic pathway used in mammals to incorporate excess nitrogen into urea and remove it from the body. However, it appears to play a far more wide-ranging role in the group of algae known as diatoms. Scientists from the Max Planck Institute of Molecular Plant Physiology in Potsdam are part of an international team of researchers that has succeeded in identifying the urea cycle in diatoms as a distribution and recycling centre for inorganic carbon and nitrogen. The urea...

2011-05-11 12:00:00

SAN DIEGO, May 11, 2011 /PRNewswire-USNewswire/ -- Researchers from the J. Craig Venter Institute (JCVI) along with an international team of scientists have published a paper detailing new findings about marine diatoms showing that they utilize a urea cycle and that this cycle enables these organisms to efficiently utilize carbon and nitrogen from their environment. The paper is being published in the May 12th, 2011 issue of the journal Nature. The research team, led by Andrew Allen from...

2011-05-10 16:02:52

The acidification of the world's oceans could have major consequences for the marine environment. New research shows that coccoliths, which are an important part of the marine environment, dissolve when seawater acidifies. Associate Professor Tue Hassenkam and colleagues at the Nano-Science Center, University of Copenhagen, are the first to have measured how individual coccoliths react to water with different degrees of acidity. Coccoliths are very small shells of calcium carbonate that...

2011-05-10 15:18:10

Reef fishes and many other marine species live all their adulthood in one place but early in their lives, when they're eggs and larvae, spend a short period of time drifting and swimming in the open ocean. It seems intuitive that the duration of this open water period should determine the geographic extent over which species are found as species that spend longer drifting at sea are likely to reach greater distances. Interestingly enough, numerous studies have consistently failed to find any...

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2011-04-19 14:21:18

By David Malmquist, Virginia Institute of Marine Science A new study by researchers at the Virginia Institute of Marine Science shows that turbulence from boat propellers can and does kill large numbers of copepods"”tiny crustaceans that are an important part of marine food webs. The study"”by VIMS graduate student Samantha Bickel, VIMS professor Kam Tang, and Hampton University undergraduate Joseph Malloy Hammond"”appears in the on-line issue of the Journal of Experimental...

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2011-04-08 09:42:28

University of Miami scientists using the geologic record of corals to understand how reef ecosystems might respond to climate changeClimate change is already widely recognized to be negatively affecting coral reef ecosystems around the world, yet the long-term effects are difficult to predict. University of Miami (UM) scientists are using the geologic record of Caribbean corals to understand how reef ecosystems might respond to climate change expected for this century. The findings are...

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2011-04-01 08:15:28

A team of scientists in the United Kingdom and the United States has warned that the native fauna and unique ecology of the Southern Ocean, the vast body of water that surrounds the Antarctic continent, is under threat from human activity. Their study is published this week in the peer-reviewed journal Annals of the New York Academy of Sciences. "Although  Antarctica is still the most pristine environment on Earth, its marine ecosystems are being degraded through the introduction of...

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2011-03-27 11:08:50

Passage of icebergs through surface waters changes their physical and biological characteristicsIn a finding that has global implications for climate research, scientists have discovered that when icebergs cool and dilute the seas through which they pass for days, they also raise chlorophyll levels in the water that may in turn increase carbon dioxide absorption in the Southern Ocean.An interdisciplinary research team supported by the National Science Foundation (NSF) highlighted the research...

56b9293463c6c936a29f39ba7f7282891
2011-03-20 06:44:28

Research can help assess impacts of climate change, other threats to coral reef ecosystems University of Miami (UM) Rosenstiel School of Marine & Atmospheric Science scientist Chris Langdon and colleagues developed a new tool to monitor coral reef vital signs. By accurately measuring their biological pulse, scientists can better assess how climate change and other ecological threats impact coral reef health worldwide. During a March 2009 experiment at Cayo Enrique Reef in Puerto Rico, the...


Latest Biological oceanography Reference Libraries

Ocean Acidification
2013-04-01 10:32:20

Ocean acidification is the name that was given to the ongoing decrease in the pH of Earth’s oceans, a cause of the uptake of anthropogenic carbon dioxide from the atmosphere. About 30 to 40 percent of the carbon dioxide that is released by humans into the atmosphere dissolves into the lakes, oceans, and rivers. To maintain the chemical equilibrium, some of it reacts with the water to create carbonic acid. Some of these extra carbonic acid molecules react with a water molecule to provide a...

45_9dcdfc9da62991a8f200f2f82f8638d9
2014-01-12 00:00:00

A salp is a barrel-shaped, free-floating tunicate (any living organism which has a saclike body enclosed in a thick membrane or tunic with two openings or siphons for the ingress and egress of water). It moves by contracting which pumps water through its body. The salp strains the water with internal feeding filters as it goes through the body. It consumes phytoplankton that are strained from the water. Salps are common throughout equatorial, temperate, and colder seas. They are most often...

39_6e87e3fa1b5a996861bc65cc76c916fa
2007-04-03 00:34:20

The South American pilchard, Sardinops sagax, is a sardine of the Family Clupeidae, the only member of the genus Sardinops, found in the indo-Pacific oceans. Their length is up to 15.75 in (40 cm). It has a number of other common names: Australian pilchard, Blue pilchard, Blue-bait, Californian pilchard, Chilean sardine, Japanese pilchard, Pacific sardine, and Southern African pilchard. The South American pilchard is a coastal species that forms large schools. Coloration is blue green on...

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Word of the Day
negawatt
  • A unit of saved energy.
Coined by Amory Lovins, chairman of the Rocky Mountain Institute as a contraction of negative watt on the model of similar compounds like megawatt.