Effects of Logging on the Marine Enviroment at Onepua Bay, Marlborough Sounds

Authors: Pieter Fransen, Shane McMahon, Paul Gillespie, Rod Asher
Publication: New Zealand Journal of Forestry, Volume N.Z.J.For. 1998, Issue N.Z.J.For. 43(3) 1998, pp 13-18, Nov 1998
Publisher: New Zealand Institute of Forestry

Abstract: Changes in coastal seabed habitat and sediments monitored from 1992 to 1995 were not caused by logging activities during that period. Significant differences (P<0.05) in proportions of fine sediments, and the numbers and types of marine life were attributed to natural variation and/or storm-induced sedimentation rather than logging activities. The flushing effect of wave and tidal action was a major factor preventing the accumulation of fine sediments, and associated biological impacts, on the near-shore seabed below the logged area. While it was not possible to separate logging versus storm effects, we cannot rule out long-term effects as more of the catchment is logged.