NYS Natural Heritage Program "Palustrine"
PALUSTRINE COMMUNITIES V. PALUSTRINE SYSTEM 1. Deep emergent marsh: a marsh community that occurs on mineral soils or fine-grained organic soils The palustrine system consists of non-tidal, (muck or well-decomposed peat); the substrate is perennial wetlands characterized by emergent flooded by waters that are not subject to violent wave vegetation. The system includes wetlands permanently action. Water depths can range from 6 in to 6.6 ft (15 saturated by seepage, permanently flooded wetlands, cm to 2 m); water levels may fluctuate seasonally, but and wetlands that are seasonally or intermittently the substrate is rarely dry, and there is usually standing flooded (these may be seasonally dry) if the vegetative water in the fall. cover is predominantly hydrophytic and soils are The most abundant emergent aquatic plants are hydric. Wetland communities are distinguished by their cattails (Typha angustifolia, T. latifolia), wild rice plant composition (hydrophytes), substrate (hydric (Zizania aquatica), bur-weeds (Sparganium soils), and hydrologic regime (frequency of flooding) eurycarpum, S. androcladum), pickerel weed (Cowardin 1979). (Pontederia cordata), bulrushes (Scirpus Peatlands are a special type of wetland in which tabernaemontani, S. fluviatilis, S. heterochaetus., S. the substrate primarily consists of accumulated peat acutus, S. pungens, S. americanus), arrowhead (partly decomposed plant material such as mosses, (Sagittaria latifolia), arrowleaf (Peltandra virginica), sedges, and shrubs) or marl (organically derived rice cutgrass (Leersia oryzoides), bayonet rush (Juncus calcium carbonate deposits), with little or no mineral militaris), water horsetail (Equisetum fluviatile) and soil. Stable water levels or constant water seepage bluejoint grass (Calamagrostis canadensis). allow little aeration of the substrate in peatlands, The most abundant floating-leaved aquatic plants slowing decomposition of plant litter, and resulting in are fragrant water lily (Nymphaea odorata), duckweeds peat or marl accumulation.
[Show full text]