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Tag: "ocean" at biology news

Scientists discover new life forms in the Arctic Ocean

...ry exciting discovery," comments Dr. Lovejoy. "The ocean covers 70% of planet earth and we are only now coming to appreciate its rich and complex biodiversity." The other members of the team responsible for this discovery are Fabrice Not, Khadidja Romari, and Daniel Vaulot from Université Pierre et Marie...

Warming oceans threaten Antarctic glaciers

... These glaciers are vulnerable to small changes in ocean temperature, such as those that have occurred over the 20th century, and those predicted for the 21st century. A rise of less than 0.5 ºC could have triggered the present imbalance." Professor Duncan Wingham, at University College London, insists ...

Gene chips forecast ecological impacts of climate change

...e effects of temperature stress and low pH, due to ocean acidification, on adults and early developmental s... of oceans with the atmosphere and the role of the ocean in carbon dioxide sequestration, marine ecosystems will experience temperature changes combined with...

Long-lived deep-sea fishes imperiled by technology, overfishing

...tat that used to provide them protection ?the deep ocean ?is now accessible to fishing because of new techn...ish, better known as Chilean sea bass. In the deep ocean off the Pacific Northwest, sablefish ?also known as black cod ?are another depleted species. Deep-s...

Twenty of world's 162 grouper species threatened with extinction

...ntists with baseline data for analyzing threats to ocean species. “This assessment forms part of a growing focus on over-fishing and conservation concerns for fishes in general,?said GMSA Director Kent Carpenter. The workshop identified the need to better protect outer reef areas and to manage spawni...

Deep in the ocean, a clam that acts like a plant

...heir bodies. Around hydrothermal vents deep in the ocean live communities of giant clams with no gut and no functional digestive system, depending on symbiotic bacteria to use energy locked up in hydrogen sulfide to replace sunlight. Now, the genome of this symbiont has been completely sequenced and publis...

Microfossils unravel climate history of tropical Africa

...This large temperature difference between land and ocean surface resulted in drier conditions compared to t...re record. A comparison of both records shows that ocean surface and land temperatures behaved differently during the past 25,000 years. During the last ice ...

Baby fish 'smell their way home'

...oral fish species are swept off their home reef by ocean currents within days of hatching. Ordinarily you'd expect them to be thoroughly mixed up and this would mean the population of one reef would be pretty much the same, genetically, as another," he says. "But that is not the case. There are major ...

Ocean's 'twilight zone' may be a key to understanding climate change

...redictive capacity of numerical models that relate ocean carbon to global climate change on different time ...ess the carbon goes all the way down into the deep ocean and is stored there, the oceans will have little impact on climate change." Buesseler was the lea...

Williams College biologist explores photosynthetic apparatus

... evolved in response to selection pressures in the ocean environment," she explained. "The Prochlorococcus... ability to accurately model primary production in ocean ecosystems, as well as to a better understanding of the mechanics and evolution of photosynthesis. ...

Satellites shed light on global warming

...an reflected by ice-covered oceans, increasing the ocean temperature. Average temperatures in the Antarc...ernal waves that have major effects on large-scale ocean circulation and thus on climate. These very long waves travel slowly across the oceanic basins influ...

Volcanic eruptions, ancient global warming linked

... responsible for the global warming and changes in ocean chemistry. The breakthrough came from being abl...e with periods of global warming or changes in the ocean chemistry, Duncan pointed out. No conclusive links have been established, however, he added. "Sim...

MIT's ocean model precisely mimics microbes' life cycles

Scientists at MIT have created an ocean model so realistic that the virtual forests of div... their real-world counterparts. This model of the ocean is the first to reflect the vast diversity of the invisible forests living in our oceans-tiny, singl...

CSIRO imagery shows Outer Great Barrier Reef at risk from river plumes

...e Wealth from Oceans Flagship to track coastal and ocean events in real-time, building on the technology behind the successful SENTINEL bushfire tracking system. While extreme coastal events have been captured by remote sensing before, this is the first time they can be seen and analysed straight after...

Overfishing large sharks impacts entire marine ecosystem, shrinks shellfish supply

...trate that the loss of sharks is cascading through ocean ecosystems and inflicting collateral damage on foo...tions several steps removed. Through our work, the ocean is not so unfathomable, and we know better now why sharks matter." ...

By 2048 all current fish, seafood species projected to collapse

...nce society. "Species have been disappearing from ocean ecosystems and this trend has recently been accele...e to the oceans impact not only fisheries, but the ocean ecosystem's overall productivity and stability. Specific services that have declined involve the mai...

Bacteria in small sea life yield new way to make potential cancer drugs

...ses from bacteria found in sponges and other small ocean creatures. In a study published Sunday, Nov. 5, in Nature Chemical Biology online, researchers examined symbiotic bacteria that live only in sea squirts and other marine life. These bacteria are responsible for making a wealth of chemicals, which a...

Hundreds of thousands of viral species present in the world's oceans

The ocean is full of life--large, small, and microscopic. Bacteriophage (phage) viruses are minute, self-replicating bundles that alter microorganisms' genetic material and moderate their communities through predation and parasitism. Despite their small size, ...

Ocean sampling yields environmental sources of coral symbionts

By sampling different ocean locations for the presence of an elusive but criti...l to recognize where these symbionts reside in the ocean environment. In the new work, the researchers succeeded in identifying Symbiodinium in the water...

Researchers link ocean organisms with increased cloud cover and potential climate change

...portant mechanism by which chemical emissions from ocean phytoplankton may influence the formation of cloud...d droplet concentrations seen over a large area of ocean off the eastern coast of South America. Using complex numerical models, they estimated that the...

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