Earthworm invasion will change forests
Research finds exotic earthworms alter forest composition, reducing sugar maple seedling cover and plant species richness. Sedge species overpopulates, becoming difficult to control.
Science News for August 3, 2003
From studies of a rare human mutation to new approaches to herbicides or antibiotics
Researchers from Fox Chase Cancer Center have discovered a rare genetic mutation in PBGS enzyme, resulting in a drastic structural rearrangement. This change can lead to the production of new protein complexes and potentially develop novel herbicides or antibacterial agents.
High percentage of US youth report PTSD symptoms & other disorders
A study finds nearly four percent of US adolescents report PTSD symptoms, while 7.4% experience major depression and 8.2% substance abuse/dependence. Interpersonal violence increases risk for these mental health disorders in adolescents.
SourceAmerican Psychological Association·JournalJournal of Consulting and Clinical Psychology·DateAug 3, 2003