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Tag: "lakes" at biology news

Cornell lab confirms deadly fish virus spreading to new species

...e first time in the Lake Winnebago chain of inland lakes about 25 miles south of Green Bay on Lake Michigan; confirmation is pending. And millions of dead freshwater drum formed windrows of carcasses along the beaches of Lake Erie in 2006, all victims of VHSV. Other species from the Great Lakes Basin are...

Leeches ferry infection among newts

...ted a survey of 16 red-spotted newt populations in lakes and ponds near Centre County, Pa. They found the disease in 12 of the 16 newt populations. A strong correlation between infection prevalence and numbers of bloodsucking leeches, plus the finding that the infection is more likely to appear on commo...

Paper challenges 1491 Amazonian population theories

...veral thousands of years. We looked at clusters of lakes and landscapes where people lived, and asked, did ...t used at all," he says. "So this is a total of 10 lakes that provide three separate instances -- one in Brazil, one in Ecuador and one in Peru, where there ...

National Academies advisory: Invasive aquatic species in the Great Lakes

...ductions of nonindigenous aquatic species into the lakes by vessels traveling the St. Lawrence Seaway. The committee's final report will comment on the strengths and weaknesses of various options and recommend those that seem most promising. DETAILS: 9 a.m. to 5:30 p.m. on May 7 at the Marriott Toronto...

Too much of a good thing? Excess nutrients or water limit biodiversity

...water)." It also helps explain why grasslands, lakes and rivers that are polluted with nitrogen and phosphorous (usually from agriculture) have fewer species. The reduction of species where the Mississippi River empties into the Gulf of Mexico is one of the best known examples of this phenomenon. T...

Siberian lakes burp 'time-bomb' greenhouse gas

Frozen bubbles in Siberian lakes are releasing methane, a greenhouse gas, at rates ...sed it to quantify methane emissions from two thaw lakes in North Siberia. As they walked across the frozen lakes they mapped locations and types of discre...

Particle size matters to bacteria ability to immobilize heavy metals

...ment and contaminant metal mobility in our rivers, lakes and other surface waters, as well as groundwater," said Bose. He will present the research at the 232nd National Meeting of the American Chemical Society on September 10-14 in San Francisco. Using iron oxide nanoparticles (less than 100 nm), whic...

Better sludge through metagenomics

...e the nutrient phosphorus, in an effort to protect lakes and rivers from eutrophication, a deterioration of water quality characterized by excessive algae blooms. Accumulibacter play a vital role in wastewater management, accumulating massive amounts of phosphorus inside their cells. "Engineers and micr...

Scientists use an 'ice lolly' to find polar bacteria in their own backyard

...e to go to extreme environments, such as Antarctic lakes and glaciers. Bacteria previously isolated from polar climates, and have properties which allow them to survive in extreme cold, have been isolated from soil in temperate environments. Professor Virginia Walker and her colleagues at Queen's Universi...

Pollen proves beneficial for northern lakes

...ures, located along the shorelines of three boreal lakes in northwestern Ontario's Experimental Lakes Area....cenarios could affect the productivity of northern lakes by altering the magnitude and timing of delivery of this important source of forest-derived nutrient...

Fish virus in Northeast spreading to other fish species

...ue to the increased presence of vacationers on the lakes in summer, as well as the increased awareness since reports of mortalities earlier in the season. Also, recent storms and heavy winds may have washed up more fish from deeper waters. Groocock added that while more species of fish are dying, absolute ...

Study shows hope for ridding lakes of clawed invader

...has visited ecological havoc on numerous Wisconsin lakes - may have finally met its match. Since its intr...the 1950s, the crayfish has spread to thousands of lakes and streams, clear cutting the underwater forests that are critical fish habitat, evicting the nativ...

Paleontologists learn how not to become a fossil

...ep-sea trenches and intertidal zones to freshwater lakes and streams. But do they all have the same chance of becoming fossils? Jablonski, Kidwell and their colleagues based their study on an examination of museum specimens, combing the scientific literature and conducting statistical analyses. They deter...

Leave it to salmon to leave no stone unturned

...osystemwide effects, causing changes in rivers and lakes far from the nests. From decreasing the amount of algae there is to eat to possibly influencing when aquatic insects emerge, spawning salmon can be extraordinary "environmental engineers," says Jonathan Moore, a UW graduate student in aquatic and fi...

Earth Rx: A microbial biotechnology prescription for global environmental health

... on contaminated sources, such as polluted rivers, lakes and groundwater. "All of these issues are closely interrelated," says Bruce Rittmann, director of the Center for Environmental Biotechnology in the Biodesign Institute at ASU. "For example, most of the pollution wastes that we worry about are really...

Genome sequencing is for ecologists, too

... an organism's genetics. The animals are common in lakes and ponds and have been used to monitor the health of aquatic environments. Members of the species can reproduce both with and without sex, which has important implications in evolutionary biology and ecology. Species whose genomes have been sequenc...

Ocean 'dead zones' trigger sex changes in fish, posing extinction threat

...cularly nitrogen, accumulate in oceans, freshwater lakes and other waterways. These nutrients trigger the growth of huge algae and phytoplankton blooms. As these blooms die, they sink to the ocean floor where they are decomposed by bacteria and other microorganisms. Decomposition depletes most of the oxyge...

Tropical Atlantic cooling and African deforestation correlate to drought, report scientists

...an records, the scientists analyzed data from four lakes that are distributed across central Africa on the monsoon belt. The three sea surface cooling periods found by the scientists correlate to records of low lake levels. These clearly were times of drought; the land became more arid. The authors state,...

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

...f salt that has been used to treat phosphorus-rich lakes for decades. They also cleaned water from the rivers flowing into the Salton Sea with polyacrylamide, a new type of polymer used increasingly for reducing sediment loss from agricultural fields. Results from the study appear in the November/December...

Expert dispels bird flu paranoia

...op domesticated poultry from accessing open ponds, lakes or creeks. Keep domestic waterfowl separate from poultry where the waterfowl have access to the same water as wild waterbirds. Be alert for bird flu symptoms in poultry such as coughing, sneezing, noisy breathing, increased tear production, swoll...

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