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Held Pond
Held Pond, Weston
Held Pond

(223 KB, .pdf format*)

Transect Data (122 KB, .pdf format*) | Water Data

         

   Held Pond is a 31.4 pond located in Weston, CT.   The pond is accessible only to the residents that live along its shore.  Most of the shoreline has residential development. Boating is the major recreational activity on the lake.  The pond was formed by filling in an old rock quarry.   This created a narrow band of shallow water before a steep drop off, limiting the area that light reaches the bottom and plants can grow.

   Our 2011 survey found 14 species of aquatic plants, including the three invasive species Hydrilla verticillata (Hydrilla), Najas minor (Brittle waternymph), and Potamogeton crispus (Curly leaf pondweed).  H. verticillata was found in small patches primarily along the northern shore.  H. verticillata is a problem species in the lake for many years extensive mechanical removal has been employed to manage the plant.  N. minor was found in small to medium patches close to shore around the perimeter of the lake except for the southern shore.  P. crispus was the most dominant of the invasive species. It was found in many patches around the entire lake.  Because our survey occurred in the summer when is less pronounced than in the spring, we probably are underestimating its presence.   

   We found many native shallow water species in Held Pond including: Alisma species, Elatine species, Eleocharis species, Gratiola aurea, Pontederia cordata, and Typha species.  Potamogeton foliosus was the most dominant native plant, occurring in deeper water in the northwest corner.  Three small patches of Nymphaea odorata (white water lily) were found and also one small patch of Ceratophyllum demersum.  Najas flexilis and Potamogeton bicupulatus was found in small, scattered patches around the entire lake.  Four transects were taken, totally 40 points.   The most frequently occurring plant was Potamogeton foliosus  (found at seven points).

Find Common Plant Names

(65 KB, .pdf format*)

Species recorded in our 2011 survey of Held Pond. Click on plant to view herbarium mount. (invasive species in bold)
Najas flexilis
Typha species


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