Thursday, May 28, 2009

STUDY FINDS DAMAGED ECO SYSTEMS CAN RECOVER

ENN - A recent study by Yale University’s School of Forestry and Environmental Studies reports that if humans commit to the restoration effort, most ecosystems can recover from very major disruption within decades to half-centuries. . . . According to the study, researchers compiled information from 240 independent studies conducted since 1910 that examined large, human-scale ecosystems recovery following the termination of both human and naturally imposed disruption. . .

83 studies demonstrated recovery for all variables; 90 demonstrated a mixture of recovered and non-recovered variables; 67 demonstrated no recovery for any variable; and 15 percent of all the ecosystems in the analysis are beyond recovery. The average recovery time was 20 years or less, and reportedly did not exceed more than 56 years. It was found that recovery from human disturbances was slower than natural disturbances, such as hurricanes.