Using genetics to measure the environmental impact of salmon farming
Determining species diversity makes it possible to estimate the impact of human activity on marine ecosystems accurately. The environmental effects of salmon farming have been assessed, until now, by visually ...
Wet-sieving uncovers additional human relics
A Western Australian archaeology consultancy has conducted a cost-benefit analysis of improved treatments for sediment samples taken from ancient occupation sites.
Lead in 'tap-water' in ancient Rome up to 100 times more than local spring waters
No signs of radiation in water near nuke dump
Water samples from three reservoirs near the federal government's underground nuclear waste dump in southeastern New Mexico show no signs of contamination after a radiation leak at the plant.
Long-term study of uranium release could improve remediation strategies
Uranium poses a serious risk of groundwater contamination at the Hanford Site. But most previous experimental studies addressing this important issue were performed over short-time periods, focusing on the ...
A 'smoking gun' on the Ice Age megafauna extinctions
It was climate that killed many of the large mammals after the latest Ice Age. But what more specifically was it with the climate that led to this mass extinction? The answer to this is hidden in a large ...
Rising mountains dried out Central Asia, scientists say
(Phys.org) —A record of ancient rainfall teased from long-buried sediments in Mongolia is challenging the popular idea that the arid conditions prevalent in Central Asia today were caused by the ancient ...
On warming Antarctic Peninsula, moss and microbes reveal unprecedented ecological change
By carefully analyzing a 150-year-old moss bank on the Antarctic Peninsula, researchers reporting in Current Biology, a Cell Press publication, on August 29 describe an unprecedented rate of ecological change ...
Old permafrost carbon released
Using indicator molecules, a team of researchers headed by ETH Zurich demonstrates that carbon stored in the Arctic permafrost is being mobilised in Eurasian river basins.
Study shows legacy of pesticides difficult to avoid
A University of Otago study shows that the tell-tale legacy in rural South Island areas of pesticides banned many years ago remains, regardless of the type of sheep and beef farming now taking place on the land.
Gnangara groundwater packs acidic punch
HYDROGEOLOGISTS have detected elevated acidity levels in the Gnangara Mound water table, north of Perth.
Sea-ice ecosystem possibly triggered evolution of baleen whales and penguins
The circum-Antarctic Southern Ocean is an important region for global marine food webs and carbon cycling because of sea-ice formation and its unique plankton ecosystem. The origin of its ecosystems can be ...
CO2 at work during last global 'hot spell' but hardly alone
(Phys.org) —UC Santa Cruz ocean sciences professor Christina Ravelo is part of an international team that is using ocean floor sediment samples to compile data on past periods of global warming in order ...
Research points to abrupt and widespread climate shift in the Sahara 5,000 years ago
As recently as 5,000 years ago, the Sahara—today a vast desert in northern Africa, spanning more than 3.5 million square miles—was a verdant landscape, with sprawling vegetation and numerous lakes. Ancient ...