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Amos Lake, Preston - 2006

Amos Lake Species Map

            Amos Lake is a  113 acre lake in the Thames River Drainage basin. Shoreline development varies from sparse to dense and most houses do not have buffer zones between their yards and the water.  A dam at the southern end of the lake raises the natural water level 1.7 meters (2 feet), giving the lake an average depth of over 6 meters (20 feet) and a maximum depth of 14 meters (45 feet).

            Our survey conducted in August 2006 found  Myriophyllum heterophyllum X laxum as the only invasive plant species.  The dominant submerged species was Potamogeton robbinsii, which was found almost continuously around the perimeter of the lake.  Nymphaea odorata was the most abundant floating-leaved plant, found in most protected coves and along the western shoreline.

            Surrounding the point on the western shoreline was abundant Potamogeton gramineus and Potamogeton robbinsii.   The north-western shoreline is dominated by Nymphaea odorata and Potamogeton robbinsii, with some small patches of Nuphar variegata.  Further north are sizeable patches of Sagittaria sp. and Potamogeton robbinsii as well as an isolated patch of Myriophyllum tenellum.  The northern-most point contains sparse Potamogeton robbinsii and  Utricularia gibba.  The north-eastern shore contains a mixture of Potamogeton robbinsiiSagittaria sp., Nymphaea odorata and Potamogeton pulcher

            The southern half of the lake contains several very diverse aquatic plant communities in the coves.  Two coves, towards the center of the lake on opposite shores, east and west, contain large amounts of Nymphaea odorata, Nuphar variegataBrasenia schreberi,  Potamogeton robbinsii, Potamogeton gramineus, Utricularia purpurea, Glossostigma cleistanthum, Utricularia vulgaris, and Najas flexilis .   In addition, the cove on the west shore contains small amounts of Utricularia radiata and Ceratophyllum demersum, and a sizeable patch of Myriophyllum heterophyllum x laxum.

            Further to the south-east there are two inlets containing small amounts of all Potamogeton epihydrus, Pontederia cordataPotamogeton robbinsii, Utricularia vulgaris, Potamogeton pulcher, and Utricularia purpurea.

            The southern-most cove area is flanked by a recreational vehicle park with a swimming area, containing  Potamogeton robbinsii, Pontederia cordata, Nymphaea odorata, Najas flexilis, Potamogeton gramineus, and very small amounts of Potamogeton pulcher and Glossostigma cleistanthum.

Species recorded in our 2006 survey of Amos Lake.
Click on plant to view herbarium mount.
Scientific Names
*Invasive Species

Arrowhead Quillwort
Swamp Loosestrife
Common Bladderwort Ribbon-Leaf Pondweed
Coontail Robbins' Pondweed
Variable Pondweed
Humped Bladderwort Slender Naiad
Variable Watermilfoild Hybrid*
Leafy Pondweed

Slender Watermilfoil

Snailseed Pondweed White Water Lily
Purple Bladderwort
Spotted Pondweed Yellow Water Lily



Other Amos Lake Surveys: 2018 Survey2013 Survey