Pistapaug Pond, Wallingford
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   Pistapaug Pond a 136.4-acre municipal reservoir for the town of Wallingford, and public access is prohibited. The pond is largely surrounded by forest, with some grassy areas along the southwest shore. A steep trap rock ridge runs along the eastern side of the pond, dropping steeply into the water with an extensive talus slope. The lake bottom is largely gravel, with some sand at the northern and southern ends.

   Aquatic plants grew abundantly around the pond's edges at the time of our June 2005 survey. The most abundant of these was a fine-leaved pondweed (Potamogeton pusillus) which occurred in large patches all around the pond and was particularly abundant in a broad shallow water area at the pond’s southern end. Patches of other pondweeds, including P. gramineus, P. illinoensis and P. bicupulatus, also were recorded in this area, as were bushy pondweed (Najas flexilis), water smartweed (Polygonum amphibium) and the invasive Eurasian watermilfoil (Myriophyllum spicatum).

   M. spicatum also grew along the eastern shore except where the pond's bottom dropped steeply. Small patches of Illinois pondweed (Potamogeton illinoensis) also were observed along the eastern shore, and isolated patches of coontail (Ceratophyllum demersum), Najas flexilis and  Sagittaria sp. were recorded. The northern end of the lake supported scattered plants of P. pusillus, P. illinoensis and M. spicatum.

   Plants were more abundant along the western shore, where P. pusillus and M. spicatum grew in wide, dense bands. A large area near the southwestern shore supported abundant growth of P. bicupulatus. Also in this area were patches of P. illinoensis, Najas flexilis, yellow water lily (Nuphar variegata) and Polygonum amphibium.

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Species recorded in our 2005 survey of Pistapaug Pond. Click on plant to view herbarium mount. (invasive species in bold)

Ceratophyllum demersum

Eleocharis acicularis

Myriophyllum spicatum

Najas flexilis

Nuphar variegata

Polygonum amphibium

Potamogeton amplifolius

Potamogeton bicupulatus

Potamogeton gramineus

Potamogeton illinoensis

Potamogeton pusillus

Sagittaria sp.

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