(Portland, OR)  --  An autopsy is planned for today for a body found in a southeast Portland marsh.  Investigators say the corpse discovered yesterday around 10:00 in the morning in Beggars Tick Marsh had been in the water for some time.  No name or any other information about the body has been released other than police saying no obvious signs of trauma were shown.  The body was sent to the state medical examiner to determine the cause of death.