The Impact of Hurricane Katrina on the Distribution of Subterranean Termite Colonies (Isoptera: Rhinotermitidae) in City Park, New Orleans, Louisiana

摘要

The impact of Hurricane Katrina on the distribution of subterranean termites in City Park, New Orleans, LA was determined in four sections of the park where termite activity had been continuously monitored since 2002. Monitoring stations were checkedfor the first time after Hurricane Katrina in October of 2005. The percentage of active stations in October 2005 post-Katrina was 54% compared to 59% of stations occupied by termites in August 2005 pre-Katrina. None of the nine monitoring stations that had been occupied by Reticulitermes spp. pre-Katrina was active with Reticulitermes spp. in October 2005 and three of these stations were active with C.formosanus. The percentage of stations occupied by termites in August 2006 was significantly lower thanin August 2005. However, there were no significant differences in the percentage of stations occupied by termites in August 2005, October 2005, and October 2006. Laboratory bioassays were conducted to examine how flooding affected the tunneling systemsof termites kept on different substrates for different lengths of time. All of the termites drowned when containers were flooded after termites spent 1 wk in containers. However, there were survivors in containers flooded after termites spent 4 and 8 wkin containers. These results provide evidence that the presence of carton material can improve termite survival in flooded areas.