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Tag: "oceans" at biology news

Envisat captures first image of Sargassum from space

...he carbon dioxide emitted into the atmosphere, the oceans have a profound influence on climate, making them major areas of interest for climate modellers. The discovery was made using the MERIS maximum chlorophyll index (MCI) which provides an assessment of the amount of chlorophyll in vegetation to pr...

Salty oceans provide early warning for climate change

...edicted that the waters of the southern hemisphere oceans around South Africa and New Zealand are the places to watch. Palaeoclimate data shows that the ocean’s currents (like the Gulf Stream and its North Atlantic deep water partner) are capable of shifting gears very suddenly, but until now it wasn’t cle...

Marine phytoplankton changes form to protect itself from different predators

...plays a key role in the carbon cycle of cold-water oceans may be a lot smarter than scientists had suspected. In a paper published June 11 in the online version of Proceedings of the National Academy of Sciences, researchers report the first evidence that a common species of saltwater algae – also known as...

NASA-funded robotic sub finds bottom of world's deepest sinkhole

...cluding the long-term possibility of exploring the oceans hidden under the icy crust of Europa, one of Jupiter’s moons. For the near term, NASA recently approved a project that will use these technologies to explore underneath the ice of West Lake Bonney in Antarctica’s Taylor Valley. The DEPTHX vehicle...

'Short-circuit' found in ocean circulation

... 'short-circuit' in the circulation of the world's oceans that could aid predictions about future climate change. This process in the Southern Ocean allows cold waters that sink to the abyss to return to the surface more rapidly than previously thought. This affects the Southern Ocean circulation, w...

Study warns deep-sea mining may pose serious threat to fragile marine ecosystems

... could exist on thermal and chemical energy. Since oceans have existed, more or less, since the beginning of...ning companies first turned their attention to the oceans in the 1970s, and interest grew in manganese nodules that exist on the surface of the ocean floor. H...

MIT's ocean model captures diversity of underwater forests

... help guide decisions about responsible use of the oceans in this era of global change." ...

Cloning the smell of the seaside

... birds sniff out their plankton food in the lonely oceans at astonishingly low concentrations. Scientists have known about DMS for many years but the genes responsible for its production have never before been identified. The new findings will be published in the journal Science on Friday February 2. ...

Scientists uncover link between ocean's chemical processes and microscopic floating plants

...emical processes that occur throughout the world's oceans help regulate Earth's climate. Other recent scientific studies have shown that ocean acidity is rising 100 times faster than ever before, Wingenter said, but this study links the effect of increasing ocean acidity to changes in phytoplankton, which...

New species of snapper discovered in Brazil

... new to science shows how little we know about the oceans that surround us," Moura said. "It looks like other snapper species found in the Caribbean and eastern United States, as well as the dog snapper caught by fishermen here in Brazil, but it is a distinct species with different markings and color." T...

Are we killing the world's oceans?

...the world's coral reefs? Why are dead zones in the oceans on the rise? Can aquaculture be environmentally sustainable? And how are we all to blame for the collapse of coastal fisheries? Most importantly, what can governments, industry and individuals do about it? Members of the news media are invited to...

Shedding new light on proteorhodopsin

...ptation for seafaring microbes because the world's oceans are permeated with "dead zones," areas that lack sufficient oxygen to sustain life. Subsequent studies established that proteorhodopsin is a light-driven proton pump, able to transport protons across cellular membranes in order to create stored el...

New findings blow a decade of assumptions out of the water

...omparing fathom for fathom, the Pacific and Indian oceans experience twice the amount of nitrogen fixing as ...e, indicates that the inventory of nitrogen in the oceans is likely to be less subject to major fluctuations than had been assumed. Because it has been tho...

Warming oceans threaten Antarctic glaciers

...ns that global sea level could rapidly rise if the oceans continue to warm. Dr. Andrew Shepherd, at the University of Edinburgh’s School of GeoSciences, said: "Our assessment confirms that just one type of glacier in Antarctica is retreating today ?those that are seated in deep submarine basins and flow ...

Gene chips forecast ecological impacts of climate change

... than temperature alone. Due to the interaction of oceans with the atmosphere and the role of the ocean in carbon dioxide sequestration, marine ecosystems will experience temperature changes combined with changes in ocean pH –?ocean acidification. As a consequence of the elevated levels of the greenhou...

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

...rcially prized fish from the depths of the world's oceans are severely threatened by over-fishing and the species' ability to recover is constrained by the fishes' long lifespans and low reproductive success, a panel of experts said today at the annual meeting of the American Association of the Advancement ...

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

...-entering the atmosphere as a green-house gas, the oceans may have little impact on changes in the atmospher...sals to mitigate climate change by fertilizing the oceans with iron--to promote blooms of photosynthetic marine plants and transfer more carbon dioxide from t...

Satellites shed light on global warming

... radiation that will be absorbed by ice-free polar oceans rather than reflected by ice-covered oceans, incre...hythm?for some aspects of the interactions between oceans and climate. Faster waves in a warmer ocean, as an effect of climate change, may result in complex r...

How fish conquered the ocean

... Norway have deduced how bony fishes conquered the oceans by duplicating their yolk-producing genes and fill...heir evolutionary and environmental history. "The oceans have not always been filled with fishes as nowadays" says researcher Dr. Roderick Nigel Finn at the ...

Volcanic eruptions, ancient global warming linked

...greatly increased the acidification of the world’s oceans and led to the extinction of numerous deep-sea species. Warming periods in Earth’s history are of interest as analogs to today’s climate change, Duncan said. The international science team was able to link the PETM with the breakup of Greenland...

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