First of all, thank you very much, Mr. Chair and members of the committee, for the invitation to contribute to this particular study. I will be presenting this powerpoint presentation entitled "Invasive Species in National Parks of Canada".
As my colleague from Environment Canada mentioned, once these invasive alien species arrive within our border, some very quickly expand their distribution, and it probably does not come as a surprise that they end up in one of our 42 national parks.
The second slide, as my colleague mentioned, is basically the definition of what an invasive species is. The two photos highlight some of the species we need to deal with within our national parks system. There's a photo of the zebra mussels that are found in the Great Lakes system, which are continuing their expansion, and one of a fungus called whitebark pine blister rust, which is affecting specific species of pine trees and alpine species in our Rocky Mountains national parks.
How do we manage invasive species? We manage them to meet our mandate, which is to ensure the ecological integrity of our national parks for present and future generations. Invasive alien species will simply be another of the stressors we need to manage to maintain or restore ecological integrity.
Ecological integrity is defined as “a condition that is determined to be characteristic of its natural region and likely to persist, including abiotic components and the composition and abundance of native species and biological communities, rates of change and supporting processes” within that ecosystem. We can certainly see from that definition that there are two areas: the impact on the native species within the national park and the fact that many of these species are not part of that particular ecosystem.
Over 1,000 occurrences of invasive species have been found to occur in national parks. This is not 1,000 species. Rather, through our monitoring system we've detected over 1,000 occurrences of species that have been determined to be exotic or invasive alien species.
We are monitoring some of these species in 26 of our national parks. Our southern national parks are being affected the most, and this is where we're focusing our attention. Many of our national parks in the north, in Canada's Arctic, have not had similar types of impact due to the climatic conditions.
I'm going to walk the committee through some of the examples of what we call problematic invasive species. As my colleague from Environment Canada mentioned, we cannot take action on all of these species. We are focusing on certain ones that are having significant effects on the ecological integrity of our national parks.
The first one is spotted knapweed. It was introduced from Eurasia. It displaces many of our native grasses and native forbs in open areas and is found primarily in western Canada, including in our Rocky Mountains national parks, Riding Mountain National Park, and Grasslands National Park.
We have programs in some of these parks to work with the landowners outside our boundaries to control the expansion, and in some cases to eradicate this particular species from specific areas. A very good program that's ongoing at the moment is out in Waterton Lakes National Park, where we're working with the ranchers, along with neighbouring communities, to try to control the expansion of this weed.
The next example is the white pine blister rust. It's a fungus that was introduced into Canada from Eurasia and it's having a significant impact on our alpine pine species, in particular the whitebark pine. This is again, as I mentioned earlier, found in our Rocky Mountains national parks, and from the photos you can see it can in fact have a very devastating impact on this particular pine species.
We're working right now in close collaboration with our colleagues in the U.S. National Park Service in Glacier National Park, which is just south of Waterton Lakes, to identify particular specimens of white bark pine that in fact appeared to be immune to this particular blister rust. And hopefully in the future we'll be able to develop specific specimens of the species in order to restore the species back into the landscape.
Moving on to the next slide, I'd like to talk a little bit about the Norway brown rat. This is a rodent that originates from Asia, in northern China and Mongolia, and it has arrived in Canada through early trade, fishing vessels and other types of marine travel. It is having a significant impact on our colonial bird species in some of our national parks, in particular in Gwaii Haanas National Park Reserve in British Columbia. This particular invasive species is really affecting the population of seabirds such as the ancient murrelet, which burrows on the land in some of these coastal islands. We're working with the province, along with other partners, to in fact try to eradicate this species from some of the islands, and with some success.
I was mentioning to colleagues outside the room that when I was visiting one of the projects in Gwaii Haanas National Park Reserve it appeared that on some of the islands we are having an impact, through baiting, of removing some of the rats from some of the coastal islands. With respect to the national park system, this particular species is found in 19 other Parks Canada sites beyond Gwaii Haanas.
How do these invasive species get into our national parks landscape? It's primarily through activities such as road construction, where new soil or machines are moved from one area to another, bringing along the seeds or the larvae of these particular species. And my colleague mentioned that through the increase in temperature over the last few decades we're seeing the expansion of some of these species.
We do have management tools in place within Parks Canada, and the next slide identifies a series of them, including our park management plan and specific policy on removing invasive species.
The last few slides are really an example of how Parks Canada works with volunteers and works with partners to control some of these invasive species.
The example that we're using is Gulf Islands National Park Reserve in British Columbia, where we are attempting to restore a specific species within the Garry oak ecosystem, and our staff are working with the local communities and volunteers on programs such as Broom Sweep, which is meant to remove Scotch broom from that landscape.
There are continuing challenges, and they're no different from some of the challenges identified by my colleague in the national strategy.
Thank you very much.