Wairau/Awatere Resource Management Plan 29 July 2014 hieracium, briar and wilding pines, which reduce grazing and in some cases threaten ecological value. Research and past experience shows that in some areas repeated summer burning and grazing may not be sustainable in the long term. This may be because areas transformed from tall tussock land to short tussock grasslands are much more vulnerable to invasion by rabbits and hieracium. Burning also results in a significant The next page is Page 12- 11 12 – 10B