Name:
Potamogeton zosteriformis - Ceratophyllum demersum - Elodea canadensis Southern Great Lakes Shore Herbaceous Vegetation
Reference:
Midwestern Ecology Working Group...
Description:
This deep emergent marsh community typically occurs in the southern Great Lakes region of the United States and Canada, including southern Lake Michigan, Lake St. Clair, Lake Erie, Lake Ontario, and into the St. Lawrence River, and possibly Lake Champlain. Remaining stands in the area are primarily found in lacustrine estuaries, barrier-beach lagoons, or sand-spit swales. In the Great Lakes, the estuaries are often formed at the mouths of rivers drowned by the post-glacial rise in lake level, whereas in the St. Lawrence these are formed from small streams or rivers that occupy apparent pre-glacial valleys that have been partly filled in by outwash and alluvial deposits to form fairly broad, flat basins. Storms, seiches, and water level cycles create a very dynamic pattern of species composition and structure in the vegetation. Water depth generally exceeds 0.3 m. Dominant submerged aquatics include <i>Ceratophyllum demersum, Chara</i> spp., <i>Elodea canadensis, Heteranthera dubia, Myriophyllum spicatum, Najas flexilis, Potamogeton</i> spp. (including <i>Potamogeton amplifolius, Potamogeton friesii, Potamogeton gramineus, Stuckenia pectinata (= Potamogeton pectinatus), Potamogeton zosteriformis</i>), and <i>Vallisneria americana</i>. Floating aquatics include <i>Lemna minor, Lemna trisulca</i>, and <i>Spirodela polyrrhiza</i>. Other rooted aquatics include <i>Nymphaea odorata, Nuphar advena (= Nuphar lutea ssp. advena), Nelumbo lutea, Peltandra virginica</i>, and <i>Sagittaria latifolia</i>. The exotic <i>Hydrocharis morsus-ranae</i> is increasingly common in St. Lawrence, Lake Ontario, and Lake Erie marshes.
Accession Code:
VB.CC.36904.CEGL005152
Plot-observations of this Community Concept:
0
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