INTEGRATED TREATMENT ACTION PLANLake Leland Integrated Aquatic Plant Management Plan
AQUATIC PLANT CONTROL INTENSITY ZONES
In any water body, control of nuisance aquatic plants can be achieved at different scales: high intensity control, low intensity control, or no control. For example, high intensity control may be needed around docks and in swimming areas, whereas, low intensity control or no control would be suitable in most other areas.
At the present time, the steering committee feels that high intensity control of Brazilian elodea is appropriate around private docks, the boat launch, and swimming areas, and no control is appropriate for the rest of the lake (Figure 23). If in the future the spread of Brazilian elodea degrades the fishery, a low control (conservatively low stocking of grass carp) is deemed appropriate.
For the reed canary grass in the upper 2000 feet of Leland Creek, the committee feels a high intensity control is appropriate because of the flooding problem and its impact on on county and state roads, septic drainfields, and encroachment of the lake on adjacent lands.
At the present time, the yellow flag iris is not considered a serious problem and low intensity control would be appropriate.
RECOMMENDED CONTROL STRATEGY
After spending several steering committee meetings looking at the available options for controlling Brazilian elodea, there is a consensus of opinion on one factat this point in time, there is no 100 percent method of control that is environmentally friendly, cost effective, and meets the needs of the community. The process of evaluation has come down to one of weighing the pros and cons for each scenario. The steering committee recognizes that the effective management of Brazilian elodea will be an on-going concern and will take a long term commitment. The management strategy is not static and may need to change over time as conditions change.
For the present, the steering committee recommends the following strategies to address the presence of Brazilian elodea in Lake Leland:
Reed Canary Grass
The invasive reed canary grass that is causing flooding problems is only part of a complex problem. Because of the poor drainage resulting from a low gradient, Leland Creek not only needs a canary grass control program but also continual vigilance to keep the channel clear of beaver dams and other obstructions. The resumption of beaver trapping should be encouraged to keep the population in control. Research indicates that some communities have solved beaver problems with innovative ideas that allow humans and the beaver to coexist. It is recommended that Leland Neighborhood Improvement Club include reed canary grass and beaver control in LNIC concerns. As with Brazilian elodea control, this dilemma will require a long term commitment.
As a start for control, after much deliberation the steering committee recommends the use of the herbicide RODEO on the canary grass as the least damaging and most cost effective alternative. But there are several items of consideration with this strategy.
Yellow Flag Iris
Yellow flag iris, which has increasingly been spreading along the shore of the lake, can best be controlled by hand digging. Those residents who would like to see less of the plant along their shoreline are encouraged to selectively remove the plant.
PRIMARY ACTIONS, TIMELINE, and COST
PUBLIC EDUCATION PROGRAM
Throughout the IAPMP process, public outreach has been regularly occurring to keep the larger community informed on the status of the proceedings. Meetings, workshops, newsletters, and newspaper articles have been utilized in the past. These methods of education are expected to continue with the help of volunteers from the Leland Neighborhood Improvement Club. Information has also been disseminated through the Jefferson County Conservation District in the form of public displays. This form of awareness will be encouraged to continue.
Signs that bring attention to the Brazilian elodea problem in Lake Leland and show how to avoid the spread of noxious aquatic plants have been developed by Ecology. These are being installed at the Leland boat ramp and other nearby lakes. Similar notices are being placed on the campground bulletin board, and educational flyers are scheduled to be handed out to visitors and residents alike. Since noxious aquatic weeds are spread by transport on boat motors, trailers, and fishing gear, continued public outreach to boaters utilizing the public launch is highly recommended. Residents trained in the identification of noxious aquatic weeds should continue annual monitoring of lake vegetation for early detection of any new noxious infestations.
In addition to noxious aquatic weed information, the importance of Best Management Practices (BMPs) should also be stressed to the community. These watershed stewardship activities should help reduce nutrient, contaminant, and sediment inputs into the lake. Ecology has a publication entitled Blueprint for a Lake-friendly Landscape (Appendix F) that addresses BMPs for shoreline properties. It would be beneficial to distribute a copy to all lakeside residents on a yearly basis.
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