Eurasian Water Milfoil

Aquatic Invasive Species:  Eurasian Water Milfoil

By, Jason Tutkowski

Water Intern

North Lakeland Discovery Center

While paddling or boating on any lake I always keep on the lookout for Eurasian water milfoil.  It is an aquatic invasive plant that has the potential to explode in growth if it were ever to invade the lakes in the Town of Winchester.  It is a submersed aquatic plant that rapidly grows in the spring and continuously throughout the summer.  Eurasian water milfoil has many defining features.  Like all milfoils it has four feather-like leaves that encircle the central stem.  The stems themselves may also show a red-pinkish color.  On each feather there are 12 or more pairs of leaflets (thin/compact leaves).  Northern water milfoil, its native lookalike, has the same feather arrangement, but has only 10 pairs of leaflets or less.  So, why exactly does it have the potential to become such a big problem in Winchester?  This plant spreads via fragmentation and is dispersed by the water current and boat traffic.  Any boat that runs through a clump of Eurasian water milfoil has the potential to tear pieces off.  Each of those pieces can grow into a new plant, so in lakes that have a boat landing and high boat traffic the possibility of spreading it increases.  The plants can also grow in thick clumps that prevent sunlight from reaching native plants as well as disrupting recreational activities such as fishing, boating, and swimming.  If you suspect that you have potentially found Eurasian water milfoil please contact the North Lakeland Discovery Center at ais@discoverycenter.net or by phone at 715-543-2085.  Feel free to also bring a sample to the Discovery Center in a plastic baggie filled with water.  Note where you found it on a map and describe the area you found it.  Early detection is key to preventing the spread of this invasive plant. 



NOTE: This will be Jason's last post before he heads off to grad school. Thanks, Jason, for your contributions to the Birch Lake blog this summer. If you're up north again next summer, we'd welcome more.

Town of Winchester AIS List

Here's an aquatic invasive species list for the lakes in Winchester that Glen sent to me. I found a link to the Vander Zanden Lab with description and pictures of the Chinese Mystery Snail.

Loon Update - August 17, 2015

The loons were a little too far from the dock to get a really good picture but you can see that both the babies are still with Mom and Dad.

Ann Marie sent me a picture of the loons that she took on August 10. She's close enough to really get a good picture. Thanks, Ann Marie.

"Baby" Picture

Here are the Birch Lake baby loons. Aren't they cute? Thanks, Ann Marie, for sending the picture.

*Update* The loons made it down to our area of the lake last night (August 5). Here's a quick picture from the dock.

AIS Information -- Curly Leaf Pondweed

Here's a post and pictures from Jason about Curly Leaf Pondweed.

Curly Leaf Pondweed

Curly Leaf Pondweed Turions

Aquatic Invasive Species:  Curly Leaf Pondweed

By Jason Tutkowski, Water Intern

North Lakeland Discovery Center

The North Lakeland Discovery Center and dedicated volunteers are traversing waters in the Town of Winchester in search of aquatic invasive species (AIS).  Curly leaf pondweed is one of the most immediate AIS threats – we do not want this plant taking root in the lakes in Winchester.  Curly leaf pondweed has many defining features.  Its leaves look like thin lasagna noodles which are crisp to the touch and have serrated margins.  Those spiky edges are a key feature which differentiates it from clasping leaf pondweed, its native lookalike.  So, why exactly is it a problem?  It is one of the first aquatic plants to grow in the spring and spreads rapidly through turions (reproductive structures) so it out-competes native plants.  It can also grow horizontally along the surface of the water which blocks light for other aquatic species and makes boating and fishing more difficult.  Then when it dies in mid-summer the decomposing plants can sap dissolved oxygen from the water and also can increase phosphorus in the water causing algal blooms.  Even though it is currently past its peak growth, curly leaf is still present in the water.  Look for it growing in soft substrate and in shallow water about ten feet deep or less.  The main way you can prevent it from spreading into lakes in the town of Winchester is to inspect, wash, and dry your boats, trailers, and recreational equipment before moving between lakes and streams to make sure you are not transporting any “hitchhikers.”  If you suspect you have potentially found this plant or any other invasive species, please contact the North Lakeland Discovery Center at ais@discoverycenter.net with the location where you found it and a photo or sample, if possible.