Reuters: The U.S. government response to the BP oil spill has frustrated environmental groups and Gulf Coast conservationists, who say they’re getting scant information about the disaster’s potential ecological effects. "There’s a lot of concern now about the marine impact and we’re not getting a truly transparent response from NOAA (the National Oceanic and Atmospheric Administration)," Aaron Viles of the Gulf Restoration Network said on Thursday. Viles acknowledged that this kind of …