"The knock on effect for humans is that some of these marine resources that we rely on may not be available in the future," the marine biologist, who was not involved in Rahmstorf's study, told The Associated Press by telephone.
Rahmstorf also reiterated warnings of rising sea levels caused by global warming, saying that in 70 years, temperature increases will lead more frequent storms with 200 million people threatened by floods.
Scientists blame the past century's one-degree rise in average global temperatures at least in part for the accumulation of carbon dioxide, methane and other heat-trapping greenhouse gases in the atmosphere — byproducts of power plants, automobiles and other fossil fuel burners.
The 1997 Kyoto accord requires 35 industrialized countries to reduce greenhouse-gas emissions by 5 percent below 1990 levels by 2012. The Kyoto countries meeting in Nairobi are continuing talks on what kind of emissions targets and timetables should follow 2012.
