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Mono Pond, Columbia
Mono Pond

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   Mono Pond is a 102 acre lake located in Columbia, CT.  The lake is man-made, with a dam at the northern end.  A state-owned public boat ramp is located on the northern end of the lake.  Most of the eastern shoreline is undeveloped.  The western shoreline is moderately developed, with most homes have a buffer zone of plants before the edge of the lake.  The southern half of the lake is beginning to fill in with sediment, making that portion very shallow.  The area has begun to take on wetland characteristics.  Due to the shallowing of the southern half, a survey could not be performed over that area.  Only the northern half of the lake was able to be surveyed.
   The 2012 CAES IAPP survey of Mono Pond found the presence of 15 species.  Three species were invasive: Cabomba caroliniana (Fanwort), Egeria densa (Brazilian waterweed), and Myriophyllum heterophyllum (Variable watermilfoil).  M. heterophyllum was the most dominant plant in the lake.  Although it did not occupy as much of the littoral zone north of the island as C. caroliniana did, it grew in very high abundance and covered the surface around the island and south.  Very little C. caroliniana grew south of the island.  E. densa was found only in two small patches north of the island along the western shore. 
   Six transect points were taken around the survey area of Mono Pond.  Each transect consisted of 10 points, with a total of 60 points taken.  Four species were found on over half of the transect points.  M. heterophyllum was most commonly found with 78% of the points having an occurrence.  Utricularia purpurea, a native species was second most common, occupying 75% of the points.  C. caroliniana (65%) and Utricularia gibba (native, 53%) were the other species that occurred on more than 50% of the points.  Several native, floating leaf species were found covering much of the surface south of the island.  Plant included Brasenia schreberi (30%), Nuphar variegata (7%), and Nymphaea odorata (43%).  Overall, Mono Pond was found to have high, abundant, vegetation growth.

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Species recorded in our 2012 survey of Mono Pond. Click on plant to view herbarium mount. (invasive species in bold)
Potamogeton bicupulatus


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