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Antarctic in Biological News

Ancient ecosystem thrives millions of years below Antarctic glacier

BOZEMAN, Mont. -- Scientists have found an ancient ecosystem below an Antarctic glacier and learned that it survived millions of years by transforming sulfur and iron compounds for growth. Described in the April 17 issue of Science , the ecosystem lives without light or oxygen in a pool of bri...

UK robot sub searches for signs of melting 60 km into an Antarctic ice shelf cavity

Autosub, a robot submarine built and developed by the UK's National Oceanography Centre, Southampton, has successfully completed a high-risk campaign of six missions travelling under an Antarctic glacier. Autosub has been exploring Pine Island Glacier, a floating extension of the West Antarctic...

Final frontier: Mission to explore buried ancient Antarctic lake given green light

An international team of scientists led by the UK has been given the go-ahead to explore one of the planet's last great frontiers - an ancient lake hidden deep beneath Antarctica's ice sheet. Buried under 3 km of ice, the lake the size of Lake Windermere (UK) may have been isolated for hundreds ...

CO2 drop and global cooling caused Antarctic glacier to form

New Haven, Conn. Global climate rapidly shifted from a relatively ice-free world to one with massive ice sheets on Antarctica about 34 million years ago. What happened? What changed? A team of scientists led by Yale geologists offers a new perspective on the nature of changing climatic condition...

Global warming threatens Antarctic sea life

MELBOURNE, FLA.Climate change is about to cause a major upheaval in the shallow marine waters of Antarctica. Predatory crabs are poised to return to warming Antarctic waters and disrupt the primeval marine communities. "Nowhere else than in these ecosystems do giant sea spiders and marine pill...

Rare Antarctic fossils reveal extinction of tundra before full polar climate arrived

(Boston) An international research team in Antarctica led by David Marchant, an associate professor of earth sciences at Boston University, has reported the discovery of exceptionally well-preserved freshwater fossils including mosses, microscopic one-celled algae, known as diatoms, small fresh wa...

Even the Antarctic winter cannot protect Wilkins Ice Shelf

Wilkins Ice Shelf has experienced further break-up with an area of about 160 km breaking off from 30 May to 31 May 2008. ESA's Envisat satellite captured the event the first ever-documented episode to occur in winter. Wilkins Ice Shelf, a broad plate of floating ice south of South America on t...

Unmanned aerial vehicles mark robotic first for British Antarctic Survey

Scientists at British Antarctic Survey (BAS) in collaboration with the Technical University of Braunschweig (TUBS), Germany have completed the first ever series of flights by autonomous unmanned aerial vehicles (UAVs) in Antarctica. This is the first time that unpiloted UAVs have been used in the ...

Has the mystery of the Antarctic ice sheet been solved?

A team of scientists from Cardiff Universitys School of Earth and Ocean Sciences and Amgueddfa Cymru - National Museum Wales travelled to Africa to find new evidence of climate change which helps explain some of the mystery surrounding the appearance of the Antarctic ice sheet. Ice sheet forma...

Krill discovered living in the Antarctic abyss

Scientists have discovered Antarctic krill (Euphausia superba) living and feeding down to depths of 3000 metres in the waters around the Antarctic Peninsula. Until now this shrimp-like crustacean was thought to live only in the upper ocean. The discovery completely changes scientists understandi...

ANDRILL's 2nd Antarctic drilling season exceeds all expectations

McMurdo Station, Antarctica, Nov. 28, 2007 -- A second season in Antarctica for the Antarctic Geological Drilling (ANDRILL) Program has exceeded all expectations, according to the co-chief scientists of the program's Southern McMurdo Sound Project. One week ago (Nov. 21), the drilling team passed...

LSU professor looks for life in and under antarctic ice

BATON ROUGE Antarctica is home to the largest body of ice on Earth. Prior to approximately 10 years ago, no one thought that life could exist beneath the Antarctic ice sheets, which can be more than two miles thick in places, because conditions were believed to be too extreme. However, Brent Chr...

Scientists discover new life in the Antarctic deep sea

Scientists have found hundreds of new marine creatures in the vast, dark deep-sea surrounding Antarctica. Carnivorous sponges, free-swimming worms, crustaceans, and molluscs living in the Weddell Sea provide new insights into the evolution of ocean life. Reporting this week in the journal Nature...

Female Antarctic seals give cold shoulder to local males

Female Antarctic fur seals will travel across a colony to actively seek males which are genetically diverse and unrelated, rather than mate with local dominant males. These findings, published in this week's Nature, suggest that female choice may be more widespread in nature than previously believ...

Warming oceans threaten Antarctic glaciers

Scientists have identified four Antarctic glaciers that pose a threat to future sea levels using satellite observations, according to a study published in the journal Science. Experts from the University of Edinburgh and University College London determined the effect that Antarctica and Greenlan...

Researchers discover which organs in Antarctic fish produce antifreeze

Thirty-five years ago Arthur DeVries of the University of Illinois at Urbana-Champaign first documented antifreeze glycoproteins (AFGPs) in Antarctic notothenioid fishes. This month three colleagues report they've solved the ensuing, long-running mystery of where these AFGPs, which allow the fish t...

Scientists find Antarctic ozone hole to recover later than expected

Scientists from NASA and other agencies have concluded that the ozone hole over the Antarctic will recover around 2068, nearly 20 years later than previously believed. Researchers from NASA, the National Oceanic and Atmospheric Administration (NOAA) and the National Center for Atmospheric Researc...

Thin tough skin, slow-growing gills protect larval Antarctic fish

Very thin but hardy, unblemished skin and slow developing gills appear to be keys to survival for newly hatched Antarctic notothenioids, a group of fish whose adults thrive in icy waters because of antifreeze proteins (AFPs) in their blood. Such adaptations are important, researchers at the Unive...

The Antarctic Ocean floor

The biodiversity of the seas and the ocean floors is a mystery for science yet to unravel. With this curiosity, a research team - including a biologist from the University of the Basque Country, is to set sail for the second time on an oceanographic campaign to study this biodiversity of the seas a...

Freeze-dried mats of microbes awaken in Antarctic streambed

An experiment in a dry Antarctic stream channel has shown that a carpet of freeze-dried microbes that lay dormant for two decades sprang to life one day after water was diverted into it, said a University of Colorado at Boulder researcher. The results showed the resilience of life in the harsh ...

Discovering an ecosystem beneath a collapsed Antarctic ice shelf

The chance discovery of a vast ecosystem beneath the collapsed Larsen Ice Shelf will allow scientists to explore the uncharted life below Antarctica's floating ice shelves and further probe the origins of life in extreme environments. Researchers discovered the sunless habitat after a recent underw...

B-15A collides with Antarctic ice tongue

Agilent Technologies Inc. (NYSE: A) today announced that it has for the first time released the chip design, probe sequence and annotation information for all of its microarrays. The release of this information is expected to improve cross-laboratory experimental research and cross-platform data co...

Ice core 'dipstick' indicates West Antarctic ice has thinned less than believed

Rising sea levels 20,000 years ago, as the last ice age was beginning to wane, often are attributed in part to melting in West Antarctica. But in a new study led by University of Washington researchers, an ice core of 1,000 meters was used as a sort of dipstick to show that a key section of the ...

Climate-caused biodiversity booms and busts in ancient plants and mammals

... supporting the evolution of mammals during the Paleocene and Eocene (65 million to 35 million years ago) and that only at the end of the Eocene, when antarctic glaciations began, did Earth's climate deteriorate enough to cause observable changes in land mammal diversity. "Our paper documents the fact that ...

Symposium to discuss geoengineering to fight climate change at the ESA Annual Meeting

...tic could lead to dangerous levels of ultraviolet light hitting the Earth's surface," she says. "In this case, the recovery of the ozone hole over the antarctic could be delayed by decades." Another large-scale geoengineering scheme is fertilizing the oceans with iron to increase carbon uptake from the atmo...

Seals quickly respond to gain and loss of habitat under climate change

...l Sciences, Durham University, found that when the antarctic ice sheets of the Ross Sea Embayment retreated in ... the ancient remains of seals from the now extinct antarctic colony showed high levels of genetic diversity, pr...pted, probably because seals migrate annually into antarctic waters to feed. However, when the ice returned an...

Research shows that 'invisible hand' guides evolution of cooperative turn-taking

...he capacity to reach negotiated agreements. These include apes, monkeys, birds, and antelopes that take turns grooming each other, and mating pairs of antarctic penguins that take turns foraging at sea while their partners incubate eggs or tend to chicks. "It is far from obvious how turn-taking evolved wit...

Your own private global warming

... A group of researchers from the British antarctic Survey have collected individuals from a wide range of species commonly found in antarctic waters and subjected them to increasing levels of ... disruptions earlier and to greater extents in the antarctic marine ecosystem. ...

Evolution: Crabs go deep to avoid hot water

... near the water surface though temperatures found around some parts of the antarctic (below 1C) are too extreme for their survival. A paper, published 1...redict the consequences of range expansion in the warming waters around the antarctic Peninsular region. King crabs are of great commercial value, and fish...

All in sight

...ale clearly stands out against the background of the cold North Atlantic or antarctic waters. Infrared thermography is already in use with great success, for ...rt research projects concerning whale population in the scarcely researched antarctic regions. Further application possibilities regarding ship security (evasion...

Your own private global warming

... A group of researchers from the British antarctic Survey have collected individuals from a wide range of species commonly found in antarctic waters and subjected them to increasing levels of ... disruptions earlier and to greater extents in the antarctic marine ecosystem. ...

Scientists urge global action to preserve water supplies for billions worldwide

...ts represented the United Nations World Climate Research Program, the Chinese Academy of Sciences, the Indian Space Research Organization, the British antarctic Survey, the California Department of Water Resources as well as several American universities. ...

Satellite imagery shows fragile Wilkins Ice Shelf destabilized

...o of the ice bridge that had previously linked the antarctic mainland to Charcot Island. The ice bridge, whi... of its kind. Eight separate ice shelves along the antarctic Peninsula have shown signs of retreat over the las...anges are the result of atmospheric warming on the antarctic Peninsula, which has been the most rapid in the So...

Increasing levels of rare element found worldwide

...n precipitation in North America, Europe, Asia, and Antarctica, and in both surface water and deep water from the North Atlantic, Pacific, Indian, and antarctic (or Southern) Oceans. Human-made osmium also comes from chromium smelters, hospital incinerators, and the normal operation of cars, but it's primarily...

Unlikely life thriving at Antarctica's Blood Falls

...y similar to sea water, but hidden under an inland antarctic glacier, appears to support microbial life in a co...ear. Despite the lack of precipitation, during the antarctic summer, temperatures rise just enough for glaciers... the Taylor Glacier, an outlet glacier of the East antarctic Ice Sheet in the otherwise ice-free Dry Valleys. T...

2009 ASPB Summer Undergraduate Research Fellowship award announcement

...the field and start my crosses! Liza Smith, University of Wollongong Mentor: Sharon Robinson Does UV radiation induce screening compounds in antarctic Bryophytes? I am very honored to be a SURF recipient in 2009, and to have the privilege of working under A/P Sharon Robinson. My project will involv...

April 2009 Geology and GSA Today media highlights

...land. Renewed glacial activity during the antarctic cold reversal and persistence of cold conditions u...gonia (50 degrees south), contemporaneous with the antarctic cold reversal. This was followed by ice recession ...atagonia, and hypothesize that the position of the antarctic Polar Front modulated the strength of these cold e...

AGU journal highlights -- March 25, 2009

...CNRS, Grenoble, France; also at Laboratoire de Glaciologie et Gophysique de l'Environnement, Universit Josef Fourier, Grenoble, France; now at British antarctic Survey, Natural Environment Research Council, Cambridge, U.K.; H.-W. Jacobi: Institut National des Sciences de l'Univers, CNRS, Grenoble, France; a...

Lohafex provides new insights on plankton ecology

...left Punta Arenas on 21 March for oceanographic work in the Drake Passage and logistics purposes at Jubany station. Scientists are also going to catch antarctic fish by traps in order to bring them to Bremerhaven for experimental work. After another stopover in Punta Arenas between 9 and 11 April Polarstern is...

New simulation shows consequences of a world without Earth's natural sunscreen

...pics collapse to near zero in a process similar to the one that creates the antarctic ozone hole. By the end of the model run in 2065, global ozone drops to 1...latitudes, but has somewhat rebounded in recent years. The largest recorded antarctic ozone hole was recorded in 2006. "I didn't think that the Montreal Proto...
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