CAES: Black Pond Maps

Black Pond - Meriden, CT



 2004 Aquatic Plant Survey of Black Pond

(1.5 MB, .pdf format*)


Transect Data (236 KB, .pdf format*) | Water Data


   76-acre Black Pond, located on the Middlefield, Meriden border, is divided into two areas, joined by a narrow channel.  A talus slope rises to a trap rock ridge from the eastern shore, and the bottom of the pond drops steeply to a maximum depth of 21 feet.  Emergent plants grow on the marshy southern shores of both sections of Black Pond as well as on much of the western shore of the pond’s larger, northeast section. A number of houses have been built on the western and northern shores of the smaller section of the pond.


   A total of 19 aquatic plant species were recorded in 2004, including two invasive species – the hybrid Myriophyllum heterophyllum X laxum and Potamogeton crispus – and 13 other submerged species. The most abundant submerged species in the main part of the pond during a 2004 survey were Potamogeton zosteriformis and Potamogeton robbinsii.  Potamogeton zosteriformis was collected in 70% of the 80 samples taken along transects in Black Pond.  Nymphaea odorata was most abundant among the floating-leaved species.  Submerged vegetation was abundant in shallow water of the pond but generally was absent where the water was more than 12 feet deep.  Few plants were found among the rock that formed the bottom on the steep, eastern side of the pond.


   In addition to Potamogeton zosteriformis, the northern section of Black Pond had individual plants or small patches of the two invasive species, Potamogeton crispus and the Myriophyllum hybrid, plus Elodea canadensis and Ceratophyllum demersum.  Abundant floating-leaved species were Brasenia schreberi, Nymphaea odorata and Nuphar variegata


   Potamogeton robbinsii and Potamogeton zosteriformis were abundant along the western side of the pond; also present were Potamogeton amplifolius, Ceratophyllum demersum, Elodea canadensis and the Myriophyllum hybrid. Floating-leaved species became increasingly abundant farther south, where the shallow channel connects the two parts of the pond. Utricularia gibba was found near the opening to the channel.


   Most abundant in the southern part the main section of the pond were Potamogeton  zosteriformis and Potamogeton robbinsii.  Other species found in that area included Potamogeton amplifolius, Potamogeton crispus, the Myriophyllum hybrid, Elodea canadensis, Ceratophyllum demersum as well as Nuphar variegata and other floating-leaved species. 


   The abundance and diversity of the aquatic plants was sharply lower on the eastern edge of the main part of the pond.  Potamogeton zosteriformis was limited to a narrow band, punctuated by small patches of Potamogeton robbinsii.  In the northeast part of the pond, Potamogeton zosteriformis,  Potamogeton robbinsii, Ceratophyllum demersum, and Myriophyllum were found.


   Plants in the shallow water along the channel to the smaller, southwest part of Black Pond included floating-leaved species, especially Nymphaea odorata, plus Potamogeton  zosteriformis, Potamogeton natans and the Myriophyllum hybrid. An estimated 30 percent of the flowers on the Nymphaea odorata had some pink coloring in their petals, which indicates a horticultural variety.  Other plants found in the southwest part of the pond included Ceratophyllum demersum, Elodea canadensis, Potamogeton amplifolius, Brasenia schreberi and Nuphar variegata.


Find Common Plant Names

(65 KB, .pdf format*)


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


Ceratophyllum demersum

Elodea canadensis

Myriophyllum heterophyllum X laxum

Najas guadalupensis

Potamogeton amplifolius

Potamogeton  crispus

Potamogeton foliosus

Potamogeton gramineus

Potamogeton illinoensis

Potamogeton natans

Potamogeton pusillus

Potamogeton robbinsii

Potamogeton zosteriformis

Utricularia  gibba

Utricularia  subulata


Nymphaea odorata

Nuphar variegata

Brasenia schreberi


Sagittaria sp.


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Content Last Modified on 3/1/2013 11:03:20 AM