Human production of fixed nitrogen, used mostly to fertilize crops, now accounts for about half of the total fixed nitrogen added to the Earth both on land and in the oceans.
articles
Eighteenth century nautical charts reveal coral loss
Centuries-old nautical charts, mapped by long-deceased sailors to avoid shipwrecks, have been used by modern scientists to study loss of coral reefs.
Lake Trout adjust their behaviour in the face of a changing climate
Canadian scientists have discovered that certain lake predators are altering their behaviour due to climate change, revealing what the future may hold for these fish and their food.
For years scientists told tales of fish such as Lake Trout adapting their feeding behaviour as temperatures change, but no empirical evidence existed. Now, a recently completed 11-year study at IISD Experimental Lakes Area (IISD-ELA) in northwestern Ontario reveals that Lake Trout have a remarkable ability to adjust their behaviour in the face of changing water temperatures.
First measurements of iodine in the Arctic reveal questions about air pollution
New measurements of molecular iodine in the Arctic show that even a tiny amount of the element can deplete ozone in the lower atmosphere.
Studying pollution over Chesapeake Bay
It was a pretty typical day for NASA scientists studying pollution in the Hampton Roads region of southeastern Virginia — busy, in other words.
And for good reason. The work they were doing could help improve air-quality forecasts in a region where the air quality picture isn’t totally clear.
Wildfire and Invasive Species Drives Increasing Size and Cost of Public Land Restoration Efforts
An examination of long-term data for lands managed by the Bureau of Land Management finds that land treatments in the southwestern United States are increasingly large, expensive and related to fire and invasive species control.
The study, recently published in Restoration Ecology, reveals an extensive legacy of land management decisions and provides new insight on strategies to increase future treatment efficacy in an extremely water-limited region.