In areas close to the shoreline, a lawn is generally not a good choice of ground cover because over 55% of precipitation runs off grass right into the lake, instead of returning to the water cycle by filtering through the soil. Natural ground cover and native vegetation, in comparison, slow the runoff and allow filtration, removing many contaminants such as oil, gasoline, road salts, fertilizers and others. These contaminants can be carried into the lake by runoff and can harm water quality and upset the natural ecosystem. Lawns also have short root systems and therefore don’t bind the soil well, which can lead to problems with erosion.
This is not to say your lawn should be entirely eliminated but you could consider restoring some natural vegetation in this area. This will begin to occur naturally if you leave a section of your lawn unmowed near shore, even a few feet to start. You can also help restore the natural shoreline by planting native species here. Many native shrubs and wildflowers are appealing and colourful and attract songbirds, butterflies and other wildlife. In addition, this native landscaping can be trimmed to retain your view of the lake.
Additionally, Canada geese love lawns that extend right to the water’s edge. They like to feed on the new grass shoots, and they don’t like to venture far from the water. In addition their feces can cause higher than normal levels of bacteria in aquatic environments. This can lead to unsafe swimming or drinking water conditions. If you are concerned about geese, you could consider changing your shoreline landscaping to include a buffer. This should help deter geese from inhabiting your property.
Note that lawns can lead to more runoff in the lake, in fact over 55% of precipitation will run off a lawn, instead of filtering through the soil and returning to the water cycle. Runoff can carry contaminants into the water which can upset the natural ecosystem.
As you have maintained much of the natural ground cover on your property, the lawn area is not as much of a concern here. In the future if you wish, you could restore some of the natural ground cover in the lawn area. This will begin to occur naturally if you leave a section of your lawn unmowed, even a few feet. You can also plant native trees, shrubs, perennials and grasses to naturalize these areas.