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Tag: "lake" at biology news

Antarctic ice shelf retreats happened before

...analysed sediments from the bottom of a freshwater lake close to the edge of the present George VI Ice Shelf. The results revealed that about 9500 years ago the ice shelf retreated, allowing the sea to flood into the lake. The ice shelf didn't reform until 1500 years later, and has been present ever since...

New Clues Add 40,000 Years to Age of Human Species

...which, along with ice cores, tree rings and annual lake deposits, are part of the geological record scientists study for indications of climate change. The team believes the Africa-Mediterranean correlation ties both regions to moister climates long ago, yielding another method to understand climate histo...

Same mutation aided evolution in many fish species, Stanford study finds

...t those fish prospered and populated the stream or lake with similarly armorless offspring. Kingsley said this work is part of a larger study to understand how evolution generates major morphological and physiological changes. "We want to learn how evolution works on a large scale," he said. In previous ...

Scientists discover unique microbe in California's largest lake

...he diversity ofblue-green algae in the hypersaline lake as part of the comprehensivestudy of the Salton Se...Engineers returned the river to itsnormal bed, the lake began to evaporate, gradually becoming one of thelargest hypersaline lakes in the United States.Beca...

South America's vast pantanal wetland may become next everglades, UNU experts warn

...est islands. It is dry half the year and a shallow lake the rest, creating a unique habitat for thousands of species, many endangered, including more than 650 bird species, over 190 species of mammal, 50 reptiles, more than 1,100 butterfly species and 270 fish species. It is also the wintering grounds for...

Scientists find fossil proof of Egypt's ancient climate

...oides tuberculata and carbonate silts from a small lake (now dry) in the Kharga Oasis of western Egypt to ...Evidence for the hominin presence abounds near the lake in the form of Middle Stone Age artifacts such as stone scrapers and blades. "The artifacts provide...

Alaskan puzzles, monitoring provide insight about North Pacific salmon runs

...rs also collected basic information about weather, lake levels, emerging insects, zooplankton levels and other fish species and juvenile salmon growth, which distinguishes the data set from other salmon monitoring records. ...

Aggressive aquatic species invading Great Lakes

...ion of some native species in Lake Erie, the first lake to be invaded. "Obviously people are concerned about the effects on native species in the other lakes that gobies have now spread to," says Balshine. ...

Taking the piste out of Alpine vegetation

...e fact that artificial snow is made from river and lake water which contains more minerals and other chemical compounds than natural snow. The findings are particularly important as ski resorts begin to feel the heat of climate change, developing higher altitude runs and using more artificial snow to kee...

Man-made wetland's effectiveness similar to natural marsh

...Algae essentially rob oxygen from water in a pond, lake and even the ocean. "We saw a pretty significant ...t Miami River, a tributary that flows into a local lake and then on to the Ohio River, which drains to the Mississippi River. The researchers studied the w...

Internet viruses help ecologists control invasive species

...ative of Russia - will spread through the Canadian lake system. Ecologists Jim Muirhead and Professor Hug...flea. Earlier work by the pair found that another lake in the network, Lake Muskoka in central Ontario, has served as the hub from which 39 other lakes hav...

Study shows eutrophic lakes may not recover for a millennium

... showed that the buildup of phosphorus in soils in lake watersheds is likely to be the source of serious c...horus in the watershed that hasn't washed into the lake yet," says Carpenter, meaning the problem is likely to persist for centuries. The new study models ...

Industrial contaminants spread by seabirds in High Arctic, new Canadian study shows

...ten very difficult due to logistical difficulties, lake sediments archive important information on environmental changes. "Lakes slowly accumulate sediments, and incorporated in these sediments is an archive of past environmental changes, much like pages in a book," says Dr. Douglas, the Canada Research ...

Bird samples from Mongolia confirmed as H5N1 avian flu

...er swans living at the same site and also a nearby lake were negative for the virus. Samples collected from other live birds at the two sites, including sixty ruddy shelducks, twenty-four bar-headed geese, and twenty-five black-headed gulls, were found to be negative for the virus. Whereas prior o...

Disappearing arctic lakes linked to climate change

...ely they shrank significantly. The overall loss of lake surface area was a loss of approximately 6 percent...all loss in surface water. "We were expecting the lake area to have grown with climate change," said Smith. "And while it did do so in the north where the ...

Acid water in East Java threatens biodiversity and local welfare

...n Crater Lake on East Java, Indonesia. This crater lake is the largest collection of volcanic water in the world and is extremely acidic (pH 0.1). The acidic water slowly seeps away, and despite dilution by two tributaries in the area the pH of the river water remains very low. This water is used for agri...

Science's Breakthrough of the Year: Watching evolution in action

...an ocean-loving species to a variety of landlocked lake dwellers. Beyond the genome, researchers watched evolution in action among a number of animals, from caterpillars to crickets, and found that behavioral differences such as what to eat and when to mate may be enough to turn a single population into ...

Leading lampreys to slaughter: Pheromone for scourge of Great Lakes identified

...prey, which laid waste to Great Lakes fisheries of lake trout and other species in the mid-20th century. ... prey have been commercially valuable species like lake trout and whitefish. Currently, the Great Lakes Fishery Commission (GLFC) controls lamprey by means...

Jefferson scientists identify gene defect leading to abnormal skin development and cancer

...prey, which laid waste to Great Lakes fisheries of lake trout and other species in the mid-20th century. ... prey have been commercially valuable species like lake trout and whitefish. Currently, the Great Lakes Fishery Commission (GLFC) controls lamprey by means...

UCR environmental scientists propose chemical solution to cleaning California's Salton Sea

...he rivers flowing into the Salton Sea, the largest lake in California, by using two kinds of water-treatme...If nothing is done, this sea will shrink, exposing lake sediments that could generate dust and worsen air quality. Fish and fish-eating birds would disappea...

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