New Zealand Journal of Ecology (2005) 29(2): 299- 309

Benefits of aerial 1080 possum control to tree fuchsia in the Tararua Range, Wellington

Research Article
Stephen C. Urlich 1,2,*
Phillip J. Brady 1
  1. Department of Conservation, Wellington Conservancy, PO Box 5086, Wellington, New Zealand
  2. Current address: Land Information New Zealand, Private Bag 4721, Christchurch, New Zealand
*  Corresponding author
Abstract: 

The Department of Conservation established tree fuchsia (Fuchsia excorticata) monitoring in the Tararua Range in 1994 to determine the effectiveness of large-scale (66 000 ha) possum control for protecting fuchsia. We present results from data collected from 39 permanent plots on fuchsia tree stem survival, growth, and canopy condition between 1994 and 2004 using standard permanent plot and foliar assessment methods. Plots were established in four areas where possums were controlled or treated by aerial application of sodium monofluoroacetate (1080) poison, and in one untreated area. More fuchsia stems died in the untreated area (29.8%) than in the treated areas combined (mean of 7%) over the duration of the study. Stem mortality was offset by a mean 3% (+ 1.1% SEM) increase in fuchsia basal area in the treated areas, whereas basal area declined by 15% in the untreated area. Stem mortality occurred largely in smaller size-classes (