Aquatic Plants in
Bass, Mud and Norrie Lakes
Marathon County
September 10, 2014
Nancy Turyk, Water Resource Scientist
2012
•
•
•
BASS LAKE
Survey conducted by UWSP July 30, 2012
WDNR point‐intercept method
Visited 203 sites; 200 sites were vegetated
•
•
•
MUD LAKE
Survey conducted by UWSP August 21, 2012
WDNR point‐intercept method
Visited 193 sites; 171 sites were vegetated
•
•
•
NORRIE LAKE
Survey conducted by UWSP June 1, 2012
WDNR point‐intercept method
Visited 121 sites; 61 sites were vegetated
Bass Lake (2012 Survey)
20 Aquatic Plant Species 5 very high quality species Common Name
Scientific Name
Coefficient of Conservatism Value (C Value)
Emergent Species
common arrowhead
Sagittaria latifolia
3
pickerelweed
Pontederia cordata
8
three‐way sedge
Dulichium arundinaceum
9
creeping spikerush
Eleocharis palustris
6
softstem bulrush
Schoenoplectus subterminalis
bur‐reed
Sparganium, spp.
purple loosestrife
Lythrum salicaria
0
reed canary grass
Phalaris arundinacea
0
Floating Leaf Species
watershield
Brasenia schreberi
6
spatterdock
Nuphar variegata
6
white water lily
Nymphaea odorata
6
floating leaf pondweed
Potamogeton natans
5
Oakes’ pondweed
Potamogeton oakesianus
10
Submergent Species
pipewort
Eriocaulon aquaticum
9
brown fruited rush
Juncus pelocarpus
8
dwarf watermilfoil
Myriophyllum tenellum
10
water‐thread pondweed*
Potamogeton diversifolius
8
twin‐stemmed bladderwort
Utricularia geminiscapa
9
large purple bladderwort*
Utricularia purpurea
9
muskgrass
Chara
7
aquatic moss
Floristic Quality Indices for Marathon County Lakes
Oakes’ pondweed C=10
Dwarf watermilfoil C=10
Three‐way sedge C=9
Twin‐stemmed bladderwort C=9
Species of Special Concern
Large purple bladderwort C=9
Water thread pondweed C = 8
Floristic Quality Index (FQI)
Bass Lake – High C value
35.0
30.0
25.0
20.0
15.0
10.0
5.0
0.0
Dwarf watermilfoil
Oakes’ pondweed
Large Purple Bladderwort
Bass Lake most abundant species (93% of vegetated sites)
Mud Lake most abundant species (81% of vegetated sites)
• C Value = 9
• Species of Special Concern
Mud Lake (2012 Survey)
19 Aquatic Plant Species
5 very high quality species Common Name
Scientific Name
Coefficient of Conservatism Value (C Value)
Emergent Species
three‐way sedge
Dulichium arundinaceum
9
creeping spikerush
Eleocharis palustris
6
common arrowhead
Sagittaria latifolia
3
pickerelweed
Pontederia cordata
8
watershield
Brasenia schreberi
6
spatterdock
Nuphar variegata
6
white water lily
Nymphaea odorata
6
needle spikerush
Eleocharis acicularis
5
pipewort
Eriocaulon aquaticum
9
water star‐grass
Heteranthera dubia
6
spiny spored quillwort
Isoetes echinospora
8
brown fruited rush
Juncus pelocarpus f. submersus
8
Nitella
Nitella spp.
7
waterthread pondweed*
Potamogeton diversifolius
8
ribbon leaved pondweed
Potamogeton epihydrus
8
water bulrush
Schoenoplectus subterminalis
9
large purple bladderwort*
Utricularia purpurea
9
small purple bladderwort*
Utricularia resupinata
9
common bladderwort
Utricularia vulgaris
7
Floating Leaf Species
Submergent Species
Floristic Quality Indices for Marathon County Lakes
Three‐way sedge C=9
Pipewort C=9
Water bulrush C=9
Species of Special Concern
Large purple bladderwort C=9
Small purple bladderwort C=9
Waterthread pondweed C=8
Floristic Quality Index (FQI)
Mud Lake – High C value
35.0
30.0
25.0
20.0
15.0
10.0
5.0
0.0
Water bulrush
Robert Freckmann
Three‐way sedge
Pipewort
Norrie Lake (2012 Survey)
26 Aquatic Plant Species
5 very high quality species
Common Name
Scientific Name
Coefficient of Conservatism Value (C value)
Emergent Species
creeping spikerush
Eleocharis palustris
6
northern blue‐flag
Iris versicolor
common arrowhead
Sagittaria latifolia
3
pickerelweed
Pontederia cordata
8
American bur‐reed
Sparganium americanum
8
common bur‐reed
Sparganium eurycarpum
5
broad‐leaved cattail
Typha latifolia
1
watershield
Brasenia schreberi
6
spatterdock
Nuphar variegata
6
white water lily
Nymphaea odorata
6
floating‐leaf pondweed
Potamogeton natans
5
Oakes pondweed
Potamogeton oakesianus
10
Floating Leaf Species
Submergent Species
muskgrass
Chara
7
waterwort
Elatine minima
9
spiny spored quillwort
Isoetes echinospora
8
brown fruited rush
Juncus pelocarpus f. submersus
8
Farwells water‐milfoil
Myriophyllum farwellii*
8
dwarf water‐milfoil
Myriophyllum tenellum
10
waterthread pondweed
Potamogeton diversifolius*
8
ribbon leaved pondweed
Potamogeton epihydrus
8
water bulrush
Schoenoplectus subterminalis
9
twin‐stemmed bladderwort
Utricularia geminiscapa
9
large purple bladderwort
Utricularia purpurea*
9
common bladderwort
Utricularia vulgaris
7
Watershield
Norrie Lake most abundant species (62% of vegetated sites)
• C Value = 6
Species of Special Concern
Farwell’s water milfoil C=8
Large purple bladderwort C=9
Waterthread pondweed C=8
Floristic Quality Indices for Marathon County Lakes
Floristic Quality Index (FQI)
Norrie Lake – High C value
Oakes’ pondweed C=10
Dwarf watermilfoil C=10
Water bulrush C=9
Twin‐stemmed bladderwort C=9
35.0
30.0
25.0
20.0
15.0
10.0
5.0
0.0
Twin‐stemmed bladderwort
Water bulrush
Recommendations
Bass, Mud and Norrie Lakes
• Minimize disturbing the lakebed from raking or pulling plants • Learn to identify and monitor for aquatic invasive species
• Focus on early detection of aquatic invasive species
Acknowledgements
Aquatic Plant Surveys
Jen McNelly
UW‐Stevens Point Students
ACKNOWLEDGMENTS
Marathon County Concerned Citizens and Property Owners
Marathon County Conservation, Planning and Zoning Staff
Mayflower Lake District, Pike Lake Sportsman Club, and Wadley Lake Sportsman Club
Marathon County Environmental Fund
Wisconsin Department of Natural Resources Professionals, Buzz Sorge, Tom Meronek, Scott Provost Wisconsin Department of Natural Resources Lake Protection Grant Program
Drs. Bob Bell, Ron Crunkilton, Kristin Floress, Chris Hartleb, Samantha Kaplan, Paul McGinley, Justin Sipiorski
UW‐Stevens Point Water and Environmental Analysis Lab
Questions?