Tag: "sediments" at biology news
Coelacanth fossil sheds light on fin-to-limb evolution
...al Forest, the fossil was excavated from Paleozoic sediments
at Beartooth Butte in northern Wyoming. Even though they both have been called living fossils, the discovery suggests that the two living groups of close fish relatives of tetrapods (lungfish and coelacanth) are both highly specialized, according t...
International team to honor 30th anniversary of deep-sea vent discovery in Galpagos
...s and major component of natural gas-seeps through sediments
in the ocean floor, Tyler said. "I expect more chemically driven sites like these will be discovered in the next 30 years," Tyler said. ChEss scientists are also excited about the possibilities deep-ocean technologies may open up for space expl...
Wright State scientist receives grant to help clean up polluted American harbors
...ent monitoring tool for harbors where contaminated sediments
are a common problem, said Burton, who chairs the universitys Department of Earth and Environmental Sciences. His research over the last 25 years has focused on developing effective methods for identifying ecological effects and contamination in aqua...
Major study predicts grim future for Europe's seas
...uent) that have accumulated in soils, aquifers and sediments
and continue to leak into the sea. This may be further exacerbated by nutrient loads accompanying intensification of food production in Europe. This combination of pressures limits the scope for short-term remedial action and in the case of the Balti...
Smithsonian scientists connect climate change, origins of agriculture in Mexico
... prehistoric pottery sherds and other artifacts in sediments
at the edges of the lakes. At one lake, phytolith data shows that maize and squash were probably planted at the fertile edges by 8000 B.P. Pollen from teosinte is indistinguishable from that of maize, but Zea pollen is consistently present in the cor...
Scientists concerned about effects of global warming on infectious diseases
...ge and water supplies, re-suspended pathogens from sediments
and displaced large populations to temporary shelters. We are at greater risk than ever before of infectious disease associated with increasing extreme weather events," says Rose. There will also be indirect effects of climate change on infectiou...
Jaap Sinninghe Damst awarded the Vernadsky Medal for innovative use of biomarkers
...ises that the model has to be validated using past sediments
and it's also important to compare this model to a... Kilimanjaro in tropical Africa. The lake contains sediments
which have recorded the transition from the last glaciation (25,000 years ago) until present day. "W...
Study finds fecal microbes high in New Orleans sediments following Hurricanes Katrina and Rita
...urricanes Katrina and Rita, scientists report that sediments
in interior portions of the city appear to be cont...e-hurricane levels within two months. However, the sediments
left behind in the flooded regions of the city appear to contain microbes commonly found in sewage t...
Urban sediments after Hurricanes Katrina, Rita contained high levels of contaminants
In the first study to evaluate urban sediments
after a natural disaster, scientists have found th... efforts should focus on evaluating the impacts of sediments
within an area affected by hurricane floodwaters, as exposure to contaminated sediments, by inhaling...
Public health and hurricanes
... efforts should focus on evaluating the impacts of sediments
within the area since exposure to contaminated sed...urce of elevated bacteria levels in the canals and sediments
appears to be the chronic discharge of contaminated water from the interior portions of the city. Po...
Volcanic eruptions, ancient global warming linked
... ash layers in east Greenland with those in marine sediments
in the Atlantic Ocean. "We think the first volca...ing" of the lava flows and heating of organic-rich sediments
in basins along the east Greenland margin were responsible for the global warming and changes in oce...
ACS News Service Weekly PressPac -- April 18, 2007
... during the smelting process and deposited in lake sediments
in the area. By analyzing metals in the sediments, the researchers recreated a 1,000-year history of metal smelting in the area, predating Francisco Pizarro and his Spanish conquistadors by 600 years. Their findings show that smelters in the Moroco...
Ancient coral reef tells the history of Kenya's soil erosion
...percent of Kenya's landmass, the Sabaki transports sediments
to the sea. The researchers took core samples from two large coral colonies, each more than 12 feet tall and about 15 feet wide. To find out how sediment flux has varied over the years, Dunbar's team measured the ratio of two elementsbarium and cal...
Healthy coastal wetlands would adapt to rising oceans
...rocesses. The model describes how vegetation and sediments
can meld into living "platforms" that adjust to ch...s the system in place and enhances the trapping of sediments
and tends to minimize the erosion," Murray said. "Up to some high level of sea-level rise, the syste...
Microfossils unravel climate history of tropical Africa
... molecules sink to the sea floor and are buried in sediments
where oxygen does not penetrate, they can be preserved for thousands of years. The ratios between the different molecules from the algal cell membrane can be used to approximate the past temperature of the sea surface. These techniques are therefore ...
Smithsonian study concludes Caribbean extinctions occurred 2M years after apparent cause
...and percent shelly material and percent mud in the sediments
give us ideas about the amount of food in the water column," O'Dea said. The team also measured which animals and plants dominated the sea floor by weighing the fossils and monitoring changes in the proportional weights of different ecological group...
Bacterium could treat PCBs without the need for dredging
... the environment is to dredge and then deposit the sediments
in a landfill. In order to detoxify PCBs the s...ethods for on-site PCB remediation." Bedard used sediments
from the Housatonic River in Massachusetts an area known to be contaminated with PCBs to develop s...
Biology professor helps others go with the flow of dam removal
...ide to dam decommissioning includes the release of sediments
stored behind them and the potential introduction of non-native exotic species. She believes both of these downsides can be mitigated with proper management. Her work on Fossil Creek included helping state and federal managers rid the waters of non-...
Exploring polar regions, understanding climate
... past climates from tiny inclusions in the ice and sediments
from the ocean floor. The largest international research campaign for 50 years. Despite their importance, the Polar regions remain to a large extent, unexplored. This is mainly due to the high level of logistics that are necessary to live and ...
Antarctic marine explorers reveal first biological changes after collapse of polar ice shelves
...rn Discoveries and Insights Larsen zone seafloor sediments
were extremely varied, ranging from bedrock to pure mud. As a result, animals living on the sediment (epifauna) were highly varied as well, though far less abundant in the Larsen A and B areas perhaps only 1% animal abundance compared to sea beds in...
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