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Tag: "ocean" at biology news

Life in the extreme

...ming to an end. Collaboration in the 'cold' As ocean sediments compact in cold seeps, fluids ooze out of the sediment and into the water. The cold-seep fluids contain chemical compounds produced by the decomposition of organic materials or by inorganic chemical reactions which occur at high temperature...

Reef warns of sea level rise

...corals we have evidence of not only unusually warm ocean temperatures, but that that this was associated with rapid melting of icesheets contributing to an additional 3 to 4 metres of sea level rise. " The cause of the sudden global warming leading to the end of the ice-ages is thought to be due to chan...

Ocean seep mollusks may share evolutionary history with other deep-sea creatures

...n hydrogen sulfide and methane leak up through the ocean floor, creating a unique chemical environment wher...ments exist at hydrothermal vents, fissures in the ocean floor where water is superheated by magma lurking just below the crust. Although seep and vent flui...

Finding an answer to Darwin's Dilemma

... glaciers increased the amount of nutrients in the ocean and led to a proliferation of single-celled organisms that liberated oxygen through photosynthesis. This began an evolutionary radiation that led to complex communities of filter-feeding animals, then mobile bilateral animals, and ultimately to the C...

First Biodiversity Census of coral reef ecosystems in the NW Hawaiian Islands

...ssess the diversity, distribution and abundance of ocean life and explain how it changes over time. This CReefs project will provide needed baseline information and foster understanding of coral reef ecosystems globally. The cruise will take place on the NOAA ship Oscar Elton Sette and depart from Honolul...

Seals protect brain, conserve oxygen by turning off shivering response on icy dives

...rmia, for example, as a result of falling into the ocean or becoming lost during the winter. In addition, several hundred thousand people die or are irreversibly injured each year following cardiac arrest, stroke or respiratory disorders which cause inadequate oxygen supply to the brain, Folkow explained. ...

Rising ocean temperatures, pollution have oysters in hot water

...d States, but over-fishing, global warming, rising ocean water temperatures and increased pollution have combined to reduce the oyster population to 5% of what it was 200 years ago, Sokolova said. The loss of oysters has far-reaching environmental implications. "We can't even imagine the expanse of oyst...

Climate experts search for answers in the oceans

... project, aimed at developing a data set of global ocean colour, both combine data measured independently b...ton chlorophyll collectively tints the surrounding ocean waters, providing a means of detecting these tiny organisms from space with dedicated ocean colour s...

Study: Living coral reefs provide better protection from tsunami waves

... "For example, we had to consider a perfectly even ocean floor, because uneven ones can funnel a wave into ...tion." Because coral reefs are dying from rising ocean temperatures, increasing ocean acidity, and direct human damage, Oppenheimer said the findings offer...

Batfish to the rescue!

... masked marauder has emerged unexpectedly from the ocean to rescue a dying coral reef from destruction in the nick of time. With the dramatic flair of comic-book superhero Batman, a batfish has saved a coral reef that was being choked to death by seaweed ?although the fish was never previously known as a ...

Ocean temperature predicts spread of marine species

... how the distance marine larvae travel varies with ocean temperature ?a key component in conservation and m...pecies, reproduces via larvae that drift far along ocean currents before returning to join adult populations. The distance larvae travel before maturing, cal...

Bacterial 'switch gene' regulates how oceans emit sulfur into atmosphere

...kton are involved with sulfur exchange between the ocean and atmosphere," said Mary Ann Moran, marine micro...d discovering a novel, keystone bacterium from the ocean first, and then sequencing its genome enabled this team to find the genes involved in the DMSP cycle...

Report warns about carbon dioxide threats to marine life

...from fossil fuel burning are dramatically altering ocean chemistry and threatening marine organisms, includ...arine calcifiers may be particularly threatened by ocean acidification. These include cold-water reefs, which are extensive structures that provide habitat f...

Corals switch skeleton material as seawater changes

... between seawater brine and rising magma along the ocean floor. Ries placed his artificial seawaters in 10...o direct relationship to recent global warming and ocean acidification, which are believed to be at least partly human caused." His team's experiments do, ...

New research finds surveys of larval-stage organisms effective for measuring marine biodiversity

...evelopmental phase where minute larvae disperse on ocean currents. "For some groups of organisms, scientists can more easily collect larvae for sampling since the habitats of the mature marine species can be totally unreachable," said Barber. "This method gives us a better idea of how well we know a part...

Researchers appeal for new regulations to save coral reefs from live fish trade

...s to halt the unsustainable plunder of the world's ocean resources. For decades tropical coral reefs have battled for survival against a complex array of threats including pollution, coral bleaching triggered by rising sea temperatures and over-fishing. In particular, the health of the reefs is being...

Jellyfish dominate fish in over-harvested Namibian waters

...sh in terms of the biomass they contribute to this ocean region. The findings represent a careful quantitative analysis of what's been called a "jellyfish explosion" after intense fishing in the area in the last few decades. The findings are reported by Andrew Brierley, of the University of St. Andrews, an...

Arctic expedition will investigate alien-like glacier

...mely hot water around geothermal vents deep in the ocean floor but are seldom observed living in cold environments. Beauchamp, Grasby, Gleeson and U of C graduate student Marie-Eve Caron leave for the glacier on June 21. From Ottawa, they will fly to Resolute, where they will be flown to the Eureka resear...

UCI scientists find chlorine may contribute to ozone formation

...air in sea salt aerosols, which are swept from the ocean into the air by the wind. Chlorine gas also is used to treat water in swimming pools, cooling towers and municipal water supplies. Chlorine atoms react rapidly with hydrocarbons and nitrogen oxides from automobile and power plant emissions, contribut...

UN review shows need to halt destructive fishing practice

...le deep oceans of the high seas ?the 64 percent of ocean that lies beyond the national jurisdictions of any individual nation. Its review, ordered by the U.N. General Assembly in 2004, was based on reports from member states on steps taken to stop destructive high seas fishing practices. A draft version ...

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