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A ''call to action'' for new members for the group had been answered and a new committee had been formed, the group's new chairman, Duncan Faulkner, said yesterday.
But the group had already decided to take an ''aggressive stance'' to protect Lake Dunstan, Mr Faulkner said.
It was also applying for charitable status.
Team leaders had been appointed within the group for four areas: lagarosiphon, freedom camping, the lake's perimeter and Kawarau Arm sediment.
Mr Faulkner said the different issues reflected the broader approach the group would have, rather than focusing solely on lagarosiphon.
Former group chairmen Glen Christiansen and Andrew Burton have previously criticised the lack of funding to tackle the issue of lagarosiphon in Lake Dunstan, compared to the money that is spent on lakes Wanaka and Wakatipu.
Land and Information New Zealand (Linz) land and property group manager Jeremy Barr said earlier this month eradicating lagarosiphon from Central Otago was not feasible with the current level of funding, and ''we see a breakthrough in technology as the key to making significant gains in the management of this weed species''.