Already a threat to fish, mussels, and other marine creatures, low-oxygen “dead zones” are expected to increase in both size and number as greenhouse gas concentrations and global temperatures continue to rise.
In the Southeast, a conventional crop rotation is two years of cotton followed by two years of peanuts. In this extended interview, Ron Bartel explains why farmers should consider a grass rotation, as well.
Warming ocean temperatures in the Atlantic may allow for the expansion of tropical fish species into areas formerly too cold for them to thrive. Observations from the past decade off North Carolina link warm years with denser populations of the destructive lionfish.
Alaska’s coastal waters are especially vulnerable to the drop in pH—acidification—that comes when excess carbon dioxide dissolves into the ocean from the atmosphere. These maps show relative risk levels for commerical and subsistence fisheries.
Since 2004, researchers in NOAA’s Global Monitoring Division have released the Annual Greenhouse Gas Index: a single value that compares the total warming effect of each year's concentrations of heat-trapping gases to 1990 levels.