These conservationists are fighting hard to keep natural areas free of weed seed and this is fully supported by most permaculturalists. As with many fields there are a vast range of people in permaculture AND in the conservation movement.
What are we all eating? Can we meet our needs with purely indigenous plants? In Australia the population is far too high to support the traditional nomadic hunter-gatherer lifestyle. Permaculture devotes much of its energies to conserving more than just plants, it conserves vital fresh water, and soil from erosion. We are trying to take the pressure of existing native forests by bringing farms into higher yield and higher diversity.
Permaculture home systems set aside a portion of the system purely for natural species habitat.
Some permaculturalsts feel that the loss of soil and species is so fast on this planet that if the weeds are prepared to hold it together while we concentrate our efforts on reducing the clearing and over-farming, then we should be grateful.
Permaculture discourages people from moving into healthy natural systems, we do not support the clearing of forests for housing estates, there is enough land cleared already for 'farming'. Permaculture promotes more sustainable eco-village design with productive natural forests around the homes.
We do not see people as weeds. We respect indigenous people and try to learn from their relationship with nature. We see natural systems as ideal, wholistic production, and we see ourselves as a fruitful part of the system, not as intruders.