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Tag: "waters" at biology news

Hot-spring bacteria flip a metabolic switch

...opus Spring contain Synechococcus that can grow in waters up to around 160°F, while other microbes in the hot spring can tolerate temperatures that exceed 175°F. But until now, it was unclear which organisms could fix nitrogen--especially in the hotter regions of the mat. "The cyanobacteria are true multit...

Oceans are 70 percent shark free

...y operated vehicles - which have been used in deep waters all over the world. Expeditions usinglanders visited the deepest abyssal plain on the planet - North of Hawaii; the South Atlantic off the Falkland Islands; the North West African slopes off Angola, the North East Atlantic Ocean, West of Ireland, an...

Tiny polyps gorge themselves to survive coral bleaching

.... Grottoli said that when the temperature of the waters around a reef exceeds that upper limit and stays there for more than two weeks or so, it triggers a bleaching event. Once that happens, the symbiotic algae and the brown or green photosynthetic pigments inside are lost. The result is a "bleached" whi...

Marine mammals are on the frontline of failing ocean health

...leeping, eating, and playing in the same nearshore waters where humans swim and surf, this land-sea connecti...and other killer whale food. Prey from California waters have a chemical signature that reflects high use of DDT as an agricultural pesticide prior to the US...

High-tech tags on marine animals yield valuable data for biologists and oceanographers

... cold deep water brings nutrients into the coastal waters off California and supports a highly productive food web. But the 2004-05 season was marked by unusually warm water along the coast, and the sea lions were forced to change their diets and their foraging patterns, Weise said. "The sea lions disappea...

Expedition discovers marine treasures

...t the atoll to avoid anchoring fees in territorial waters of St. Eustatius. The large ships also endanger local fishermen of Saba in their small boats, forcing them away from traditional fishing grounds and causing the loss of fish pots that become so-called ''ghost traps" that harm fish stocks. Leroy Pet...

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

...nioids, a group of fish whose adults thrive in icy waters because of antifreeze proteins (AFPs) in their blo... between five and 10 months before hatching in icy waters in the Austral spring. Five years of data, collected from 2000 to 2004, were analyzed. While each s...

The diversity of marine life in the Gulf of Maine region is much greater than previously thought

...ter for the Gulf of Maine and neighboring deep sea waters was prepared by the Huntsman Marine Science Centre...anges from microscopic plants to marine mammals in waters from the lower intertidal to the deep sea. Researchers at the Huntsman, led by curators Lou Van Guel...

Not just the birds

...the movement of nutrients from adjacent productive waters onto less productive land." ...

One fish, two fish: New MIT sensor improves fish counts

... so the researchers focused their attention on the waters south of Long Island, New York. When they first started, they weren't looking for fish at all - they wanted to see if their device could locate ancient riverbeds under the ocean floor. But when their reconnaissance images did not match the riverbeds,...

Research tracks whales by listening to sounds

...about 40 kilometers away ?and even farther, if the waters are shallow and the terrain even. Using those hydrophones, Mellinger discovered a number of sperm whales living in the Gulf of Alaska in the winter. The hydrophones picked up almost half as many whale sounds as in the summer ?indicating a surprising...

Underwater listening devices yield discoveries about endangered large whales

...hones (underwater microphones), deployed in remote waters off Alaska, have been used in recent years to track seasonal occurrences of blue, fin, humpback, North Pacific right, bowhead, and sperm whales, an article in the January 2006 issue of BioScience reports. Because whale calls can be detected and re...

Alaska seal pup diet may hold key to decline of population

...er marine mammals are disappearing from the chilly waters off the Alaskan coast. The population decline, whi...: changes in availability of prey warming ocean waters pollution increased presence of humans who may disturb the animals Herring, capelin and eulachon...

Evolutionary scrap-heap challenge: Antifreeze fish make sense out of junk DNA

... A2]. Fish such as cod that live in subzero polar waters have evolved to avoid freezing to death by using special antifreeze proteins that work by binding to ice crystals to prevent the crystals growing larger and causing problems. Most of these antifreeze proteins evolve by natural selection from existing...

Ocean acidification threatens cold-water coral ecosystems

...und at depths of three miles or more in cold, dark waters throughout the world's oceans. Some cold-water cor...of cold water reefs around the world were found in waters supersaturated with aragonite. However, this layer of supersaturated water is shrinking as concentr...

Study shows hope for ridding lakes of clawed invader

...t its match. Since its introduction to Wisconsin waters sometime in the 1950s, the crayfish has spread to thousands of lakes and streams, clear cutting the underwater forests that are critical fish habitat, evicting the native crayfish from one body of water after another and scooping up fish eggs like so...

NASA study solves ocean plant mystery

... before, we have always assumed that equally green waters were equally productive," Behrenfeld said. "We now know this is not the case, and that we have to treat areas lacking iron differently." For the tropical Pacific, correction for this "iron-effect" decreases scientists' estimates of how much carbon ...

Mosquito spray increases toxicity of pyrethroids in creek, study finds

...ee even a doubling of toxicity due to PBO in creek waters was unexpected. "In this instance, it appeared the biggest concern was not the aquatic toxicity of the pyrethrin insecticide in the mosquito spray, but the fact that the non-toxic synergist actually synergized the 'wrong' thing - pyrethroid pestici...

Marine 'dead zone' off Oregon is spreading

... the low-oxygen zone is also being seen in coastal waters off Washington, researchers at OSU and the Olympic...documented this year's region of low-oxygen bottom waters from Florence to Cascade Head," Chan said. "The lack of consistent upwelling winds allowed a low-oxy...

Creating a window on 'oceans in motion'

...hts into how animal behaviours change should ocean waters continue to warm.POST leader David Welch will be joined at the Dalhousie conference by Census of Marine Life colleagues from California-based Project TOPP (Tagging of Pacific Pelagics), who have forged the process of tracking large open ocean animals...

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