4.2 Ecological Integrity
Goal 2 - Ecological Integrity
Promote activities that maintain, support and enhance floral, faunal quantity and ecological integrity of upland and aquatic resources throughout the watershed.
The Long Lake Creek subwatershed is notable for its ecological resources and large tracts of minimally developed area, including wetlands, forests, and grasslands. Some areas within the upper subwatershed are located in an MCWD, local or regional conservation corridor.
There is potential to create ecological corridors through the watershed centered on the streams and wetland complexes through which they flow, and connecting with the two DNR Scientific and Natural Areas in the subwatershed as well as other resources in adjacent subwatersheds (see Figure 19). Connected corridors are desirable as they provide a variety of habitats both aquatic and terrestrial as well as protected areas for passage. Within these conservation areas wherever possible the District would promote the conservation or establishment of native vegetation to increase or maintain infiltration rates; decrease or maintain runoff rates and pollutant conveyance to water resources; and minimize erosion of shorelines and streambanks. Sustaining or improving water quality and ecological integrity is necessary to meet the District goals in this plan as well as to meet state and federal nondegradation, water quality and biological integrity requirements and to prevent the need for future TMDLs.
The Long Lake subwatershed includes numerous wetlands with exceptional or high fish or wildlife habitat value as well as wetlands with exceptional or high vegetative diversity. The Key Conservation Areas identified in this plan (see Figure 19) include those wetlands as well as associated upland areas of high ecological value such as maple-basswood forest. Conservation of those associated upland areas not only provides additional habitat type, but also helps preserve local runoff and infiltration rates. The plan also identifies the Scientific and Natural Areas as high-value resources, and coordination between the DNR, the MCWD, and other interested parties will be important to protecting and improving Wolsfeld Lake within Wolsfeld Woods SNA.
Long Lake is home to a sport fishery, while Mooney and Wolsfeld support pan fisheries. There is little information on aquatic vegetation communities in the lakes. The ecological community in Long Lake Creek is limited by the existing water quality. The primary strategies for improving aquatic communities are the acquisition of new data such as vegetation surveys and management plans, and improvement of water quality. There are several wetlands in the subwatershed with exception or high vegetative diversity. These would be inspected at least annually for invasive vegetative species.
Desired Outcomes: Functional and healthy ecological corridors and waters throughout the subwatershed
- Macroinvertebrate Index of Biotic Integrity (M-IBI) in Long Lake Creek
- Stream Visual Assessment Protocol (SVAP) score in Long Lake Creek
- Acres of land conserved in Key Conservation Areas
- Linear feet and width of riparian areas protected in Key Conservation Areas
- Acres of restored/created wetland within Key Conservation Areas
Goal 2.1 - Long Lake
Maintain and improve overall ecological integrity within the subwatershed.
- Continue Land Conservation Program efforts to proactively seek out conservation opportunities in areas identified in this plan as priority areas.
- Protect existing fish and wildlife habitat and promote the improvement of habitat and corridors by the conservation and restoration of key ecological areas (see Figure 19).
- Require LGUs to recognize Key Conservation Areas in their natural resources and land use planning and to identify in their Local Water Management plans how they intend to conserve their ecological values.
- Provide education and training opportunities, technical and planning assistance, and financial incentives to LGUs to actively conserve key ecological areas.
- Restore areas of degradation within key conservation areas.
- Work cooperatively with other agencies and organizations to improve upon existing conservation corridors and where practical, develop new conservation corridors connecting wetlands within the Long Lake subwatershed of exceptional or high wetland functions and values and subwatershed stream corridors with areas that have been identified by others as having high local, county, regional or national ecological significance.
- Identify keystone, umbrella, and indicator species to serve as indicators of ecological integrity, evaluate existing habitat within the subwatershed, and develop strategies for the conservation of that habitat.
- Provide regulatory incentives for the conservation of undisturbed native vegetation as sites develop.
- Require MCWD review of preliminary plats and vegetation surveys so the District may comment on proposals and how they relate to District ecological integrity goals.
- Require submittal of a Natural Resources Inventory and Conservation Plan as a condition of permit approval.
Goal 2.2 - Long Lake
Maintain conditions suitable for a healthy and varied sport fish community within Long Lake.
- Work cooperatively with the DNR in Long Lake fishery management efforts, and request that fish surveys be conducted regularly.
- Achieve Long Lake water quality and clarity goals to maintain or improve habitat conditions.
- Manage aquatic vegetation in accordance with a vegetation management plan that takes into account fishery habitat requirements.
Goal 2.3 - Long Lake
Maintain a healthy aquatic vegetation community in Long Lake.
- Perform a baseline survey of aquatic vegetation in Long Lake and update that survey every five years.
- Develop and implement an aquatic vegetation management plan for Long Lake that evaluates and implements options for the management of internal phosphorus loads as well as maintenance of a desirable aquatic vegetation community.
- Recruit and train volunteers to monitor aquatic vegetation in Long Lake on an ongoing basis.
- Develop and implement a plan to monitor wetlands with exceptional or high vegetative diversity for presence of exotic vegetative species.
Goal 2.4 - Long Lake
Maintain conditions suitable for a healthy and varied biologic community in Long Lake Creek and other streams.
- Reduce phosphorus and sediment in Long Lake Creek and minimize periods when dissolved oxygen falls below the level necessary to sustain aquatic life.
- Implement the water quality improvement actions of this Plan to reduce load discharged into the Creek from Long Lake and washed off from the watershed.
- Work cooperatively with the City of Orono to repair eroded streambanks identified in the Stream Assessment and through other inspections.
- Implement the water quantity improvement actions of this Plan to limit periods of erosive velocities in the Creek.
- Increase macroinvertebrate and fish habitat in Long Lake Creek to achieve M-IBI scores above the MPCA threshold for impairment and to achieve a Stream Visual Assessment Protocol mean score above 5.0.
- Install habitat features such as improved substrate, cobble and boulders, vegetated streambanks, root wads, and large woody debris.
- Periodically update the Long Lake Creek stream assessment to assess current stream condition and ecological integrity.
- Monitor the macroinvertebrate community every 2-3 years.
- Improve degraded stream reaches for the purposes of bank stabilization, reducing sediment loads, preserving existing stream courses, improving habitat, and enhancing biotic integrity.
- Woody debris that falls in Long Lake Creek or other streams shall only be removed if it causes an obstruction to flow such that streambanks are destabilized or eroded or the creek is caused to overtop its banks. Such debris shall be removed by the District or by cooperative arrangement with the LGU at the owner’s expense.