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LA�s <br />Shallow Open Water -- These communities �eneraily have water depths of approximately 2 <br />meters (6.6 feet). Submergent, floating and floating-leaved aquatic vegetation including <br />pondweeds, �vater-liIies, water milfoil, coontail, and duckweeds characterize this wetiand type. <br />They differ from shallow and deep marshes in that they are seldom, if ever, drawn down. As a <br />result, emergent aquatic vegetation has littie opportunity to establish. <br />These communities provide important habitat for waterfowl, furbearers, fish, frogs, turtles, and <br />aquatic invertebrates. They are also important aesthetic and recreational resources, particularly <br />for cities. The deeper portions of Langton Lake and Benr�ett Lake fall into this category, with <br />shallower portions better fitting the shaliow and decp marsh community types. <br />OTHER PLANT ASSEMBLAGES <br />Although the plant assemblages described below may not be considered naiural co�nmunities <br />under the methods used during this Natural Corruriunity Inventory, they do provide important <br />habitat for nnany genera�ist species. They can also be aesthetically importa�t in the landscape, <br />providing buffers from developed areas. In some cases, such as an old field, there may be <br />opportunity to zeconstruct a natural community such as mesic prairie that has been lost in <br />Roseville. <br />Conifer P�antation - Large plantations of conifcrs were often plantec� in the i930s under the <br />belief that they prevent erasion. Often, these are sin�le specics groves of various pines and <br />spruces, planted closely to�ether in rows. When young, the �round cover cantinues as a field or <br />prairie, as it was previously. EventuaIly, the shade created by the pines, and the acid from <br />needle-drop eliminate most b ound cover vegetation and it becomes highly simplified or bare <br />until it is colonized by pIants tolerant of these conditions. The plantations provide wind <br />protection, caver, and breeding areas for songbirds, owls and other species, but also create a <br />dense monoculture with low diversity. Depcndin� an the ori�inal planting density, thcse <br />pIantations typically require thinning with a�e to preserve the health of the c�-ees. <br />�ld Fae�d -"old field" is a tez-m used to describe areas that were intensively �razed or cuftivated, <br />but where those activities have ceased. Old fields often havc a simplified ve�etation community, <br />dominated by smooth brome, Kentucky blue�rass, or other non-native grasses. A fe�v prairie <br />City ofRaseville �g <br />Parks Natural Resource Mmzagement <br />