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Tag: "depths" at biology news

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

...underwater exploration plunged repeatedly into the depths of Mexico’s mysterious El Zacatón sinkhole in late May, finding its previously undiscovered bottom 318 meters below the surface and generating a sonar map of its inner dimensions. The vehicle employed autonomous navigation and mapping systems develop...

Puzzling plankton yield secrets to role in evolution/global photosynthesis

...on," has long puzzled biologists. Plumbing the depths of molecular-level information of related species, genomics offers a novel glimpse into this paradox. The researchers compared the genomes of two Ostreococcus species, O. lucimarinus and O. tauri, and saw dramatic changes in genome structure and met...

Catching cancer's spread by watching hemoglobin

...rs of blood vessels. By taking images at different depths and stacking these images layer by layer, the researchers can reconstruct 3-D images of blood vessels. A major advantage of the technique is that it is "label-free," meaning it does not require the addition of fluorescing molecules but rather re...

An ancient bathtub ring of mammoth fossils

...sts that these elevations mirror the typical water depths when Lake Lewis and that larger floods and deeper waters, up to 1,200 feet, were exceptions rather than the rule. Full skeletons found at lower elevations were likely buried soon after death-by-torrent, a hard to imagine wall of water a half-mile ...

Scientists discover new life in the Antarctic deep sea

...ape, its continental slope rise and changing water depths to build a picture of this little known region of the ocean. They found over 700 new species....

Tracking sperm whales and jumbo squid

...he deepest divers in the ocean, routinely reaching depths of 3,000 feet or more. Now, in a new study, a team...es and squid spent about 75 percent of the time at depths ranging from 600 to 1,300 feet, which is "consistent with the idea that the whales were foraging whe...

UBC researchers reveal dwarf aquatic plants' hidden ancestry

...er pools and swamps, and may blossom underwater at depths of up to one metre, or as the pools dry out. "For more than a century, scientists have been piecing together the details of the rapid rise and early diversification of flowering plants," says Graham. "Discovering this living plant’s ancient herita...

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

Many commercially prized fish from the depths of the world's oceans are severely threatened by o...nt of Science. Some of the fish species living at depths greater than 500 meters take decades to reach breeding maturity, so there are no quick-fix remedies ...

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

How does life survive in the black depths of the ocean? At the surface, sunlight allows green plants to "fix" carbon from the air to build their bodies. Around hydrothermal vents deep in the ocean live communities of giant clams with no gut and no functional digestive system, depending on sy...

Fish growth changes enhanced by climate change

... By comparison, juvenile oreos, a species found at depths of around 1,000 metres, were growing 27.9 per cent...asing global warming, temperatures at intermediate depths are likely to rise near-globally,?Dr Thresher said. “This could mean that over the course of time, t...

Dig deeper to find Martian life

...ere measured on the surface of Mars and at regular depths underground, allowing the calculation of cell survival times. The team took the known radiation resistance of terrestrial cells combined with the annual radiation doses on Mars to calculate the survival time of dormant populations of the cells. So...

From hot springs to rice farms, scientists reveal new insights into the secret lives of archaea

...archaeota appear to be extremely abundant, even at depths of 2,000 feet. In Iceland, Schleper and her colleagues recently identified the first ammonia-oxidizing extremophiles-a group of Crenarchaeota that inhabit several acidic hot springs where temperatures reach 80 C (176 F). ''Collectively, our study ...

Squid-inspired design could mean better handling of underwater vehicles

... from undersea volcanoes near Hawaii to the frigid depths beneath pack ice in the North and South poles. However, while the torpedo shape of some underwater vehicles ensures rapid deployment and high cruising speeds with minimal energy, their hydrodynamic design makes them more difficult to maneuver or doc...

Extraordinary life found around deep-sea gas seeps

...al slope to the east of the North Island, lying at depths of 750?050 m. 'We discovered that one of these sites, "The Builder's Pencil", covers about 180 000 square metres (0.18 square kilometre), making it one of the largest seep sites in the world', says Dr Rowden. A few cold seep sites were previousl...

Bacteria that use radiated water as food

...he rocky crust on Earth is virtually unexplored at depths more than half a kilometer below the surface. The organisms we describe in this paper live in a completely different world than the one we know at the surface." Bacteria living in groundwater or in other subsurface environments is not news. Until n...

Sandia research to focus on early detection of harmful algal blooms

... and actually serve as the energy producers at the depths of the food web. The dense patches (or "blooms") that sometimes accumulate near the surface of the water, however, can produce potent neurotoxins that are then transferred through the food chain, accumulating in zooplankton and shellfish, eventually ...

Creating a window on 'oceans in motion'

...y and even light conditions encountered at various depths and locations. Depending on the variety of tag used, the data is revealed when an animal is recaptured, surfaces (sending the archived data to a satellite) or passes one of many acoustic receivers arrayed on the ocean floor along the coastal shelf, ...

Marine 'dead zone' off Oregon is spreading

...ashington coast reported all dead crabs in pots at depths of about 45-90 feet, north of the Moclips River. Large numbers of dead Dungeness crab have been reported on the beach as far north as Kalaloch. Numerous species of bottom fish have been found dead on the beach south of the Quinault River in Washingto...

Ocean acidification threatens cold-water coral ecosystems

...drenched, tropical seas; some species are found at depths of three miles or more in cold, dark waters throughout the world's oceans. Some cold-water coral reefs are home to more than 1,300 species of animals, a diversity rivaling some better known tropical coral reefs. Until now, scientists believed bottom ...

Some like it hot: Worms at deep-sea vents favor a fiery 45-55°C

...the Alvinellidae family of worms dwelling at ocean depths of some 2,200 meters off the Pacific coast of Washington. When the researchers placed them within a special high-pressure seawater aquarium with a sharp temperature gradient, these worms chose to remain at roughly 50 degrees Celsius for the duration ...

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