Nonnative salmon alter nitrification in Great Lakes tributaries

Nonnative species can affect the biogeochemistry of an ecosystem. For instance, Pacific salmon have been introduced as a sport fishery in many streams and lakes beyond their native range, but their introduction may be altering ...

Controlling forest fires

Simon Fraser University statistician Rick Routledge will share his knowledge of what layers of charcoal in lake-bottom sediment can tell us about an area's forest fire history, at the world's largest science fair in Vancouver.

The long-term effects of wildfires

The recent massive wildfires in Australia have killed more than 30 people and an estimated 1 billion animals, and burned 2,500 homes and millions of acres. And the human toll is expected to rise even after the blazes wind ...

Central America tropical rainfall patterns varied through time

Historic lake sediment dug up by University of Pittsburgh researchers reveals that oceanic influences on rainfall in Central America have varied over the last 2,000 years, highlighting the fluctuating influence the Atlantic ...

Understanding the Earth's climate prior to the industrial era

Tree-rings, ice-cores, and speleothems are all used to reconstruct climate of the past millennia. But are these records reliable? Researchers of the Swiss Federal Research Institute WSL, the University of Bern's Oeschger ...

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