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Manta Divers, August, 2016 Lake Lulu Event
07/30/2016

Greetings Divers!

  Summer is in full swing and Team Manta just returned from a wreck diving adventure in St. Ignace, MI.  While there, we dove wrecks in both Lake Michigan and Lake Huron. This will added to the list of “firsts” for many of our divers and went a long way to expand their diving expertise.  Manta Divers prides itself on keeping the diving fresh, with new destinations, new types of diving and diving with a specific purpose in mind. Our recent dive for the Nature Conservancy is a perfect example.

The Nature Conservancy owns land and is a steward for Lake Lulu in Walworth county.  There, we worked with Jerry Ziegler to do some Eurasian water milfoil battle andGetting Ready also help the Geological society with sample gathering. This is what Jerry had to say,

    “Lulu Lake is part of the Mukwonago River system and is the highest quality river system in southern Wisconsin; an average river system in the state might have 20 species of fish, which this one has 60 species, including five that are listed as threatened or endangered. Because of the great diversity of species, This 95-acre, spring-fed lake is a remnant of the Ice Age, created at least 12,000 years ago when the last glacier left plugs of ice scattered over what is now southern Wisconsin. These plugs later melted and formed what now are known as "kettle" lakes because of their generally round shape.

      The Nature Conservancy decided against using herbicides to treat invasive plant species that threaten the diversity of Lulu Lake. Instead, the Conservancy opted for the much more difficult option of hand-pulling individual plants and removing them from the lake.

    The big culprit is Eurasian water-milfoil, which can grow tendrils that reach 15 to 20 feet in length. Left unchecked, this plant can choke out a lake, not only for recreational activities such as swimming and boating but also reduce the habitat for native species, such as fish.

    Because some of the milfoil grows in water that is up to 15 feet deep, it is beyond the reach of swimmers or snorkelers. That's where Manta Divers has been so valuable, putting in many hours in 2014 and 2016 to remove this species.

     The Manta team also assisted Wisconsin Geological & Natural History Survey scientists, who with the Conservancy are trying to determine what caused a large Recoverymound in the bottom of Lulu Lake. The mound, which is approximately 25 feet high, rises out of water that is 40 or more feet deep. Side-scan sonar was brought in in late 2014 and showed what appeared to be plumes coming out of the steep-sided mound. But that raised a further mystery: Were the plumes water? Sand? Some other material? That's where Manta Divers came in. On July 9, Manta Divers went down with long cylinders to take soil samples from the bottom, the middle and the top of the mound. Those samples are being analyzed by geologists who will try to determine the makeup of the mound."

       Manta Divers also used large plastic syringes to take water samples where the river enters and leaves Lulu Lake to help the Conservancy determine water chemistry and quality for the area.”

In addition to the "work" we did with the scientists, while doing some touring around, we found a sunken barrel.  As several of our crew are searchand recovery specialists, it was a natural for them to use their skills to remove it from the lake. Again, Team Manta finds opportunities to use their skills in new and interesting ways!

Think about joining us on our next dive adventure!

 

In Other News…………

Congrats to Deep Diving specialist, Justin Packan, Open water divers, Don and Dave Hill.

There are still spots for Curacao in January 14-21, 2017.  This is a great spot for snorkeling, diving, both from shore and boats, touring around and just relaxing.  Call today!

 If you still need to complete your open water dives, be sure to make reservations, because, sad to say, the summer is slipping away.

 


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