保育與休閒部 保育。保護。享受。
保育與休閒部 
目錄高能潮河岸
此生態群包含主要潮汐河流及其較大支流沿岸潮間帶低處的狹窄潮平地、海岸、沙洲及河道邊緣的小塊草本植被。與鄰近沼澤相比，潮汐波動、湍流、沖刷以及波浪、風和冰塊對底質的沖刷，在這些棲息地更為明顯，而且與當時的鹽度制度相比，似乎更能強化植被組成的相關性。此類植被所佔用的底質對於潮汐等級而言相對較粗，從沙、粉砂、黏土與卵石的混合物，到有機物含量低的粗礫石與卵石。然而，能量稍低的河道邊緣土壤可能由有機物質含量較高的黏土和極細粉砂組成。棲息地一般在退潮時露出水面，但在春潮時仍會被淹没。
Vegetation of high-energy tidal shores varies from sparse to dense, but tends to be low-statured (< 1 m tall, often much less). Unlike most marshes, these communities occur in linear patches, chiefly < 10 m wide, and most occur under both freshwater and oligohaline regimes. Composition appears to vary with substrate and other environmental dynamics. Species of bulrush, particularly common threesquare (Schoenoplectus pungens var. pungens) and soft-stem bulrush (Schoenoplectus tabernaemontani), are characteristic of most sites. Common threesquare dominates gravelly shores of the tidal Potomac River in northern Virginia, where ice scouring is most frequent. Vegetation of sandy habitats subject to greater periodic turbulence tends to be sparse and contain low annuals and perennials such as shore quillwort (Isoetes riparia), Parker's pipewort (Eriocaulon parkeri), dotted smartweed (Persicaria punctata), dwarf arrowhead (Sagittaria subulata), grass-leaved arrowhead (Sagittaria graminea), American waterwort (Elatine americana), flatsedges (Cyperus spp.), common water-purslane (Ludwigia palustris), and golden club (Orontium aquaticum). Common water-willow (Justicia americana) often forms dominance patches on clayey mudflats and bars. Vegetation of mucky channel edges is usually taller and contains common threesquare, soft-stem bulrush, and square-stem spikerush (Eleocharis quadrangulata), along with pickerelweed (Pontederia cordata var. cordata), arrow-arum (Peltandra virginica), wild rice (Zizania aquatica var. aquatica), tidal-marsh amaranth (Amaranthus cannabinus), swamp barnyard grass (Echinochloa walteri), and other more typical marsh species.
參考：庫林 2002，沃爾頓等。2001.
© DCR-DNH，加里 ·P· 弗萊明。
代表性社區類型：
通過分析來自 31 繪圖樣本的數據進行了四種社區類型（圖。1），作為 798 弗吉尼亞州和馬里蘭州潮汐圖的綜合分類的一部分（自然保護區正在準備中）。下面列出的第一種社區類型相對強大，並且受到定量數據的良好支持。其他三個社區受到有限的繪圖數據和與 USNVC 中的描述一致的觀測支持。在某些情況下（例如，CEGL 006058 和 CEGL 006352），這些類型在花卉中似於概念上並且重疊。需要額外的資料收集和分析，以確定這些資料是否應該合併到更廣泛的單位。點擊下面的任何突出顯示的 CEGL 代碼以查看由 NatureReserve 瀏覽器提供的全球 USNVC 描述。
下載下面列出的每種社群類型的組成摘要統計資料表。
