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New Zealand Journal of Forestry (1998) 43(3): 13–18
©New Zealand Institute of Forestry

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

Pieter Fransen , Shane McMahon , Paul Gillespie and Rod Asher

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.
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