保育與休閒部 保育。保護。享受。
保育與休閒部 
目錄半永久封口
This group encompasses aquatic and shoreline vegetation of both beaver ponds and persistent man-made impoundments (e.g., millponds) along streams in all regions of Virginia. Compared to communities in the Floodplain Ponds and Pools group, semipermanent impoundments are more subject to unpredictable disturbances from flooding, beaver activities, irregular water fluctuations, and breaching of dams. Over time, or more rapidly when drained, these wetlands tend to fill with sediment and undergo invasion by emergent and woody vegetation. Community composition varies greatly with geographic region, disturbance regimes, substrate and water depth. Emergent, non-tidal marshes are characteristic of abandoned but persistent beaver ponds. Dominant species of such marshes in the Coastal Plain include smartweeds (Persicaria spp.), pickerelweed (Pontederia cordata var. cordata), arrow-arum (Peltandra virginica), common rush (Juncus effusus), three-way sedge (Dulichium arundinaceum var. arundinaceum), tussock sedge (Carex stricta), spikerushes (Eleocharis spp.), coastal mannagrass (Glyceria obtusa), Virginia marsh St. John's-wort (Triadenum virginicum), and swamp rose-mallow (Hibiscus moscheutos). In the Piedmont and mountains, American bur-reed (Sparganium americanum), arrow-arum (Peltandra virginica), sedges (Carex spp.), lizard's-tail (Saururus cernuus), common water-purslane (Ludwigia palustris), alternate-leaved seedbox (Ludwigia alternifolia), common cattail (Typha latifolia), southern water-plantain (Alisma subcordatum), woolgrass (Scirpus cyperinus), woodland bulrush (Scirpus expansus), and rice cutgrass (Leersia oryzoides) are more characteristic.
在深水坑中，浮動和潛水的水生植物是典型的，包括白百合（Nymphaea odorata ssp）。 海岸平原 有的奧多拉達) 和膀胱蟲（烏特里卡利亞種），以及普通斑馬（ Nuphar advena ）、水盾（布拉西亞絲尼亞）、池塘（Potamogeton spp.）、大型水星草 （Callitriche heterophyl la var. 異型)，和全 州的鴨草（ Lem na spp.）。稀有的泥炭或沙灘的海岸平原池塘，可以支持國家稀有物種，例如水牛（ Schoenoplectus subterminalis ）、龍蝦（Eleocharis robbinsii）、馬尾花（Eleocharis equisetoides）、紫色膀胱草（Utricularia purpurea）和大型漂浮心（Nymphoides aquisetoides）。
參考：庫林（2002），麥考伊和弗萊明（2000），沃爾頓等。(2001)。
© DCR-DNH，加里 ·P· 弗萊明。
