Wononscopomuc Lake, Salisbury


2004 Aquatic Plant Survey Map of Lake Wononscopomuc

(1.5 MB, .pdf format*)

Transect Data (263 KB, .pdf format*) | Water Data

The 348-acre Wononscopomuc Lake (also known as Lakeville Lake) is a natural, marl lake that supports a diverse community of aquatic plants. The town beach and a boat launch are on the lake’s north shore. Access to the lake is monitored because of fears that the invasive zebra mussel will be introduced on boats or trailers from nearby Twin Lakes. The area around the lake is residentially developed, although the houses are on large lots, and most are set far back from the lake behind tree buffers.  The maximum depth of the lake is 102 feet, and mean depth is 36 feet.

A total of 18 species were recorded during a September 2004 survey, all of them submerged species. They include two species on the state’s endangered species list. One of the lake’s two invasive species, Myriophyllum spicatum, is very abundant, particularly in deep water.

Extending from the shoreline to water 10 feet deep, a rich community of mixed species occurs all around the lake. Among the plants found in this area are Potamogeton amplifolius, Potamogeton perfoliatus, Potamogeton zosteriformis, Potamogeton pusillus, Potamogeton gramineus, Potamogeton illinoensis, Potamogeton crispus, Stuckenia pectinatus, Elodea canadensis, Najas flexilis, Vallisneria americana,  Ceratophyllum demersum and Ranunculus longirostris. Although Myriophyllum spicatum occurs among these plants as well, it becomes dominant in water more than 10 feet deep, occurring virtually alone, covering the bottom. Only occasional patches of Potamogeton illinoensis, Potamogeton perfoliatus and Vallisneria americana were observed occurring with Myriophyllum spicatum in this deep-water area.

Because of the abundance of Myriophyllum spicatum, the town operates a mechanical weed-harvester on Lake Wononscopomuc five days a week from May until late October. Aquatic plants are managed in front of houses with benthic barriers, and both barriers and sand have been used to reduce growth of plants in shallow water at a town beach.

Find Common Plant Names

(65 KB, .pdf format*)

Species recorded in our 2004 survey of Wononscopomuc Lake. Click on plant to view herbarium mount. (invasive species in bold)

Myriophyllum spicatum

Myriophyllum sibiricum

Ceratophyllum demersum

Zosterella dubia

Ranunculus longirostris

Potamogeton friesii

Potamogeton crispus

Potamogeton amplifolius

Potamogeton illinoensis

Potamogeton robbinsii

Potamogeton zosteriformis

Potamogeton perfoliatus

Potamogeton gramineus

Potamogeton pusillus

Stuckenia pectinata

Najas flexilis

Vallisneria americana

Elodea canadensis


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