保育與休閒部 保育。保護。享受。
保育與休閒部 
目錄洪流平原池塘和游泳池
Semipermanently to permanently flooded ponds or pools are uncommon natural features of major Coastal Plain and Piedmont floodplains. These wetlands are typically developed in abandoned oxbows and cut-off meanders, ranging in size from less than 0.01 ha to about four ha (0.2 to 10 ac). Community composition is probably influenced by a combination of environmental factors, including flooding regime, water depths, soil fertility, and degree of shading. Dominant vegetation varies from woodlands and shrublands in shallower, semipermanently flooded ponds to submerged or floating aquatics in deeper ponds. Scattered bald cypress (Taxodium distichum), tupelos (Nyssa aquatica and Nyssa biflora), green ash (Fraxinus pennsylvanica), or red maple (Acer rubrum) are sometimes rooted in large Coastal Plain oxbow ponds. More often, shrublands dominated by buttonbush (Cephalanthus occidentalis) or swamp loosestrife (Decodon verticillatus), or non-tidal marshes dominated by arrow-arum (Peltandra virginica), smartweeds (Persicaria spp.), and swamp rose-mallow (Hibiscus moscheutos), are established. In the more deeply flooded ponds, aquatic species prevail, with or without scattered shrubs and emergents such as Virginia chain fern (Woodwardia virginica), sedges (Carex spp.), and eastern mannagrass (Glyceria septentrionalis). Typical aquatics include common mermaid-weed (Proserpinaca palustris), bladderworts (Utricularia spp.), common spatterdock (Nuphar advena), duckweeds (Lemna spp.), duckmeal (Spirodela spp.), large water-starwort (Callitriche heterophylla var. heterophylla), water shield (Brasenia schreberi), hornworts (Ceratophyllum spp.), waterweeds (Elodea spp.), American frog's-bit (Limnobium spongia), pondweeds (Potamogeton spp.), eastern mosquito fern (Azolla caroliniana), milfoils (Myriophyllum spp.), and shade mudflower (Micranthemum umbrosum).
在這些社群中發現至少有兩種水生植物，黃色水（Ranunculus flabellaris）和羽毛葉（Hottonia inflata）是罕見或罕見的水生植物。儘管顯然更常與海豚池相關聯（見半永久性海峽生態社區組），但非潮汐出現的沼澤存在在弗吉尼亞州東部帕蒙基河的大型牛弓中。此群的濕地是海龜和兩棲動物的重要繁殖棲息地，包括國家罕見的鼠尾山龍（Ambystoma talpoideum）。發展良好的洪流平原池塘和池塘似乎是相當罕見的社區，需要進行許多額外的清查和研究。參考：弗萊明（2007），沃爾頓等。(2001)。
© DCR-DNH，加里 ·P· 弗萊明。
下載下面列出的每種社群類型的組成摘要統計資料表。
