Carnegie Mellon scientists reveal ways of studying, resolving PCB contamination in US rivers
...d key aspects of processes that govern PCB fate in sediment and developed methods to monitor, measure, track a...e, contaminated rivers. Future studies that modify sediment nutrients from contaminated sites with little or no bacterial activity also could reveal ways to coa...PCB breakdown in rivers depends on sediment-specific bacteria, find Carnegie Mellon U. scientists
...y found that bacteria in contaminated Hudson River sediment were faster at digesting an introduced PCB compared with sluggish bacterial cousins at work in contaminated Grasse River sediment. "Our goal is to determine the roles that different bacterial populations play in PCB breakdown by identifying the kin...Droughts like 1930s Dust Bowl may have been unexceptional in prehistoric times, new study suggests
... such as the 1930's Dust Bowl decade, according to sediment core studies by the team. The group's evidence imp...f the kinds of grasses that were growing then, for sediment chemistry to show how much erosion was going on, and be able to deduce climate changes -- or the lac...'Anti-plume' found off Pacific Coast
...ge that was covered with about a hundred meters of sediment and what usually happens in that case is that lava erupts onto the ocean floor and hot fluid is expelled into the water. "In this case, though, it actually drew water down into the subsurface, which is something scientists have never before observed...Rare, tiny find in West Australian waters
...zooplankton world. The pheodaria was captured in a sediment trap deployed within an 'upwelling' eddy bringing cold and nutrient-rich deep ocean water to the surface by Dr Stephan Pesant a member of the University of Western Australia team lead by Dr Anya Waite, Centre for Water Research. The micro zooplankto......caused by humans. This will be the deepest oceanic sediment core yet to be extracted from the Arctic. On completion of the expedition, the cores will be brought to the DFG Ocean Margins Research Centre's core repository at the University of Bremen, where an international group of scientists will carry out det...Using science to restore habitat for declining species
.... These findings have important implications: high sediment loads from floods or erosion can fill the cracks and undercut banks eels inhabit in the winter (2003 article: http://www.srs.fs.usda.gov/about/newsrelease/nr_2003-01-13-stream_erosion.htm ). CONTACT: Andrew Dolloff, Project Leader. (540-231-4864) ...Into the dead zone: Galveston researcher examines loss of marine life
...out sufficient oxygen, marine life on and close to sediment dies. The Mississippi is the largest river in the U.S., draining 40 percent of the land area of the country. It also accounts for almost 90 percent of the freshwater runoff into the Gulf of Mexico. Where the Mississippi empties into the Gulf Coast is...Sediments in many Central Valley streams contain toxic levels of pyrethroid pesticides
... Illinois University (SIU) in Carbondale collected sediment samples from 42 rivers, creeks, sloughs and draina...sediments for 10 days. Twenty-eight percent of the sediment samples (20 of 71) killed amphipods at an elevated rate, and in 68 percent of these sediments, the p...Oldest known evidence of cat taming found in Cyprus, researchers report in Science
...ive intactness of the skeleton and the surrounding sediment indicated someone had dug a small pit or grave, then placed the cat inside and rapidly covered it. Both skeletons are positioned symmetrically, with their heads to the west, though Vigne doesn't know if this was done intentionally. "I am not complet...Ontario researchers see increase in taste and odour-causing algae problems
...the scientific journal Freshwater Biology examines sediment from 50 lake bottoms in the Muskoka-Haliburton reg...reserved in lake sediment. Through an analysis of sediment cores, the researchers were able to reconstruct the history of these lakes, and compare the distribu...Paleofire database puts fire-scar and charcoal data online
...l effort." So far 146 tree-ring records and 4 lake sediment records have been submitted, according to NOAA's M...ld include more than 450 tree-ring and at least 50 sediment based records published in the North American literature, according to database organizers. The gre...Earliest evidence of humans affecting aquatic ecology in Canada, United States
...y. To reconstruct this history, the team collected sediment cores from the bottom of the pond and analyzed the...s their study "a good example of how lake and pond sediment analysis can be used to study the effects of human activities on ecosystems. In the future we hope t...Sediment samples suggest how plants would fare in hotter, drier future
...iology and geology departments at Illinois. The sediment from West Olaf Lake, which contains residue of pla...e drought." The researchers analyzed and compared sediment from West Olaf Lake with samples from Steel Lake, about 75 miles northeast in Hubbard County. Today ...Genetic master switch sends bacteria toward 'seafood dinner'
...chitin because little of the material turned up in sediment on the ocean floors. Where did all of the chitin go? Then, about 70 years ago, two microbiologists determined that bacteria were quickly consuming the sinking shells and preserving the ecological balance. Since then, however, several mysteries have r...Stepping way out: Scripps scientists watch clam feet elongate far from the shell
...e length of its shell to reach chemicals in marine sediment necessary for the survival of their symbionts, mar...tension process, Dufour set up aquarium tanks with sediment to investigate how clams that require chemicals differ from those that do not. Clams that live in a ...Pack rat middens give unique view on evolution and climate change in past million years
...he sagebrush vole had only recently evolved. Later sediment layers showed varying proportions of four-and five-triangle teeth, with the balance tipping toward five triangles only after the major climate event 800,00 years ago. This is seen in the cave's uppermost sediments, including the top 600,000-year-old ...Pollutant-eating microbe could speed gasworks cleanup
...Part of this evidence was that the bacteria in the sediment produced carbon dioxide (CO2) labeled with carbon-...tly, the researchers were able to isolate from the sediment and grow a previously unknown naphthalene-degrading bacterium with a matching DNA signature. The mic......s preferentially use their right flipper to remove sediment from buried food. This is the first time that any ... buried up to 40 cm deep, the walruses must remove sediment to find them. The videos showed that the walruses had four different types of foraging behaviour. T...Research shows little effect from Arctic offshore oil drilling
...What we found was that more than 80 percent of the sediment that enters the ocean over the course of the year ...n by industry, combined with movement of water and sediment offshore, help keep the coastal system clean," he said....