Floating Workshops for Aquatic Invasives Survey Results



6/21/19 Floating Workshop discussing Lake Study results for Morton and Beaver

On 6/21/19, Dean Premo, president of Whitewater Consultants conducted a floating workshop to discuss the results of the lake surveys done on Morton and Beaver.


In 2017, Natural Lakes (NL) applied for a DNR grant with the Presque Isle Town Lake Committee (PITLC). NL was awarded a $56,000 grant to survey all four of our lakes for aquatic invasive species, shore land quality, and water quality. All survey work was performed by White Water Associates from Amasa, MI, and completed in the summer of 2018.


All attendees at the 6/21 session said it was a very educational and interesting discussion. You still have time to take part in the second workshop which will be Monday 7/15/19 9am - 11:30am and will discuss the results of the McCullough and Dunn surveys. We know schedules are tough to align with weekend travelers, we tried to get as close as we could with a Friday and Monday option as these were the options available from Whitewater.


Some highlights from the 6/21 session include:

  • The Floristic Quality Index analyzes the aquatic plants and scores each plant a quotient based on how common or rare its occurrence. Index scale is between 0 and mid-40. Morton scored 39.7, one of the highest of Presque Isle lakes. Morton scored high in 2009 and again in 2019. This indicates a healthy lake in 2009 and one that is still healthy 10 years later.

  • The Simpson Diversity Index measures the biodiversity of a habitat. Morton scored as a very diverse habitat. Beaver also scored very high.

  • Shorelines are critical to lake health. Falling leaves settle to the bottom of the lake and are quickly absorbed into the ecosystem providing nutrients to the good bacteria and fungi at the bottom of the lake. Leaves are absorbed within a matter of weeks.

  • Shoreline health is also maintained by keeping a buffer on both land and water. Shoreline erosion from boat waves can be minimized by letting aquatic plants grow in the water near the shore. Water quality is maintained by not mowing lawns all the way to the lake. Any shoreline buffer will minimize soil and nutrient runoff into the water. Another benefit of a shoreline buffer of even just 3 or 5 feet? You wont have geese in your yard! Geese do not like to walk through shoreline grasses or plants.

  • Do lakes fill in over time and get shallower? Potentially yes, but the time is measured in lifetimes not just years. Our lakes are mainly ground water drainage based on our connection to the Presque Isle River. Our lake levels rise and fall based on weather and rain. There are no issues with our lake levels or any risk of them filling in anytime soon.

Based on Whitewater's preliminary report, Natural lakes are viewed as "pristine". This is not a scientific classification, it is a summary of all the positive and healthy factors about our waters.


Again, the second workshop is:

  • Monday July 15th, 9am - 11:30am - McCullough Lake - meet at Otter Landing

It's critical you RSVP so we can plan boat space accordingly. In case of inclement weather, we will move to Eagle Park Pavilion, or we may meet at someone's house depending on the number of participants.


Please RSVP by sending a email to invasives@naturallakes.net If you have questions, please also send them to the same email.


The preliminary lake survey report is available on the website. Click on the News Feed link on the top of the main website page to access the blog. Click on the lake survey report entry for additional information.

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