taswegian wrote:John no idea about these circumstances, but if it's not taken a foothold yet, then there's a strong chance of containment.
We've tackled weeds here, with one not on any list yet, but it's now recognised, due to our pushing, and will be put forward as a weed of national significance.
That said, the risk of doing nothing now is a real risk to it becoming a problem to this area and beyond.
To us its a threat to WH areas adjacent and further afield.
The key to successfully managing weeds in such areas is the ability to tackle 'emergent' outbreaks before they overtake.
Not sure how it's spread, but that's another reason to contain.
Prevent spread to other areas of extreme conservation value.
I'd not give up lightly on these sort of outbreaks.
They need addressing.
Regards
Richard
Hi Richard, I hope I haven't sent the wrong message - no one is giving up. In the Blue Mountains WHA where I volunteer, things definitely operate under similar principles to what you describe, and there has been great success in eliminating (in certain locations) or substantially reducing longstanding threats, as well as identifying and addressing new ones. I'm mainly involved in remote field trips from 1 to 3 days length, inspecting along creek lines off track. It can be very slow progress in sometimes difficult terrain, with navigation issues, pushing through thick scrub etc. For that and other reasons we have to manage our time to prioritise the most severe threats first. Depending on what we find sometimes that might mean, for example, not getting much beyond dealing with Blackberry on a particular trip, simply because we found so much of it. However we do aim to treat a range of target weeds and record full details of what could not be addressed, while identifying any new/emerging threats. There is a cycle of continual follow up, and the information is also used to apply for funding - sometimes to get contractors in to deal with larger scale infestations that are beyond the capacity of volunteer resources. The biggest problem there is urban run off into the feeder creek systems of a wide range of weeds, many of which were introduced in the 19th century, and still exist in many gardens. The Blueys are probably somewhat unique in that a large urban area sits at the top of a valley system, with the "wilderness" zone set mainly within the valleys below. Since water runs downhill, unfortunately all of the runoff heads toward the bottom. So the strategy is to stop as much as possible at the top using local bushcare groups, education of residents, and supplemented by other resources - contractors, NPWS staff, volunteers and others to attack escaped weeds in the more remote locations. Unfortunately there are some environmental weeds that are so well established that it is just not practical to treat them on a large scale until the noxious species have been removed. One example I can think of is Seaside Daisy (Erigeron spp.), which is very invasive and grows rampantly in many areas, particularly where it's wet or inaccessible, e.g. in cracks in rocks high on cliff faces, and difficult to treat with herbicide. Or the patches are so large that it's impractical to treat it at all. However if we are finding little of the primary target species we do our best to eliminate it. Hopefully one day it will become a primary target itself.
I don't know how weeds are managed in KNP as I haven't volunteered there, but I am letting them know about this suspected Rumex infestation. One of the main problems in our fragile alpine areas in NSW is that they were historically used for cattle grazing up to the ~1950s. The erosion damage and consequent weed incursions still evident in many places today, although there has certainly been great improvement since the practice was stopped.