Vegetation Classification and Mapping Project Report - USGS

More documents

Recommendations

Info

USGS-NPS Vegetation Mapping Program Colonial National Historical Park Other Comments: This association occurs as small patches within other Tidal Oligohaline Marsh types. Local Description Authors: K. D. Patterson. Plots: COLO.108, COLO113, COLO.114, COLO.118. Colonial National Historical Park Inventory Notes: Information not available. GLOBAL INFORMATION USNVC CLASSIFICATION Physiognomic Class Herbaceous Vegetation (V) Physiognomic Subclass Perennial forb vegetation (V.B.) Physiognomic Group Temperate or subpolar perennial forb vegetation (V.B.2.) Physiognomic Subgroup Natural/Semi-natural temperate or subpolar perennial forb vegetation (V.B.2.N.) Formation Tidal temperate perennial forb vegetation (V.B.2.N.g.) Alliance Peltandra virginica - Pontederia cordata Tidal Herbaceous Alliance (A.1703) Alliance (English name) Green Arrow-arum - Pickerelweed Tidal Herbaceous Alliance Association Peltandra virginica - Schoenoplectus (pungens, tabernaemontani) Tidal Herbaceous Vegetation Association (English name) Arrow-arum - (Common Three Square, Softstem Bulrush) Vegetation Ecological System(s): Northern Atlantic Coastal Plain Tidal Salt Marsh (CES203.519). GLOBAL DESCRIPTION Concept Summary: This sparsely to densely vegetated herbaceous community occurs in low intertidal portions of marshes along tidal rivers and large tributaries in Virginia. It occupies both narrow zones along channel edges in chiefly freshwater regimes and in local subsidence areas in the interior of small to large marshes under freshwater to oligohaline conditions. Peltandra virginica (green arrow arum) is a constant and typically dominant or codominant constituent. Most stands also contain Schoenoplectus pungens (common threesquare) or Schoenoplectus tabernaemontani (softstem bulrush). Other common associates include Polygonum punctatum (dotted smartweed), Zizania aquatica (annual wildrice), Leersia oryzoides (rice cutgrass), Pontederia cordata (pickerelweed), and in freshwater habitats Eleocharis quadrangulata (squarestem spikerush). Stature of prevailing vegetation is generally
USGS-NPS Vegetation Mapping Program Colonial National Historical Park forms narrow bands under freshwater conditions, Schoenoplectus pungens (common threesquare) or Schoenoplectus tabernaemontani (softstem bulrush) typically attains high cover and density. Eleocharis quadrangulata (squarestem spikerush) and Pontederia cordata (pickerelweed) are codominant; common associates include Leersia oryzoides (rice cutgrass), Polygonum punctatum (dotted smartweed), Polygonum arifolium (halberdleaf tearthumb), Zizania aquatica (annual wildrice), Bidens laevis (smooth beggartick), Asclepias incarnata (swamp milkweed), Amaranthus cannabinus (tidalmarsh amaranth), Impatiens capensis (jewelweed), Nuphar lutea ssp. advena (yellow pond-lily), Dulichium arundinaceum (threeway sedge), Sagittaria latifolia (broadleaf arrowhead), Galium obtusum (bluntleaf bedstraw), and the exotic Murdannia keisak (wartremoving herb). In rare instances Schoenoplectus fluviatilis (river bulrush) or Schoenoplectus americanus (chairmaker's bulrush) may share dominance. Oligohaline variants are typically less diverse and more sparsely vegetated, although Schoenoplectus pungens (common threesquare) or Schoenoplectus tabernaemontani (softstem bulrush) may attain high cover. Characteristic associates include Polygonum punctatum (dotted smartweed), Zizania aquatica (annual wildrice), Echinochloa walteri (coast cockspur grass), Hibiscus moscheutos ssp. moscheutos (crimsoneyed rosemallow), Leersia oryzoides (rice cutgrass), Pluchea odorata (sweetscent), Amaranthus cannabinus (tidalmarsh amaranth), Rumex verticillatus (swamp dock), and Pontederia cordata (pickerelweed). Most Abundant Species: Stratum Lifeform Species Herb (field) Forb Peltandra virginica (green arrow arum) Characteristic Species: Peltandra virginica (green arrow arum), Schoenoplectus pungens (common threesquare), Schoenoplectus tabernaemontani (softstem bulrush). Other Noteworthy Species: Information not available. USFWS Wetland System: Estuarine. DISTRIBUTION Range: This association has been documented from several tidal river systems in Virginia. Its potential occurrence outside Virginia has not been evaluated. States/Provinces: VA. Federal Lands: NPS (Colonial). CONSERVATION STATUS Rank: GNR (2-Jun-2007). Reasons: Information not available. CLASSIFICATION INFORMATION Status: Provisional. Confidence: 3 - Weak. Comments: This community exhibits considerable variation in composition and structure, largely as functions of prevailing salinity and hydroperiod. Schoenoplectus pungens (common threesquare) Tidal Herbaceous Vegetation (CEGL004188) forms similarly narrow patches and occupies similar habitats along channel margins, as do freshwater variants of this association, but is typically much less diverse and is restricted to gravelly or otherwise coarse-textured substrates on shorelines frequently subject to ice-scour. Peltandra virginica - Pontederia cordata Tidal Herbaceous Vegetation (CEGL004706) occurs in similarly low landscape positions, often adjacent to open water, but generally lacks emergent graminoids (Schoenoplectus spp. (bulrushs), Eleocharis quadrangulata (squarestem spikerush)) as important associates, and 315
Page 1 and 2:
National Park Service U.S. Departme
Page 3 and 4:
USGS-NPS Vegetation Mapping Program
Page 5 and 6:
Page 7 and 8:
Page 9 and 10:
Page 11 and 12:
Page 13 and 14:
Page 15 and 16:
Page 17 and 18:
Page 19 and 20:
Page 21 and 22:
Page 23 and 24:
Page 25 and 26:
Page 27 and 28:
Page 29 and 30:
Page 31 and 32:
Page 33 and 34:
Page 35 and 36:
Page 37 and 38:
Page 39 and 40:
Page 41 and 42:
Page 43 and 44:
Page 45 and 46:
Page 47 and 48:
Page 49 and 50:
Page 51 and 52:
Page 53 and 54:
Page 55 and 56:
Page 57 and 58:
Page 59 and 60:
Page 61 and 62:
Page 63 and 64:
Page 65 and 66:
Page 67 and 68:
Page 69 and 70:
Page 71 and 72:
Page 73 and 74:
Page 75 and 76:
Page 77 and 78:
Page 79 and 80:
Page 81 and 82:
Page 83 and 84:
Page 85 and 86:
Page 87 and 88:
Page 89 and 90:
Page 91 and 92:
Page 93 and 94:
Page 95 and 96:
Page 97 and 98:
Page 99 and 100:
Page 101 and 102:
Page 103 and 104:
Page 105 and 106:
Page 107 and 108:
Page 109 and 110:
Page 111 and 112:
Page 113 and 114:
Page 115 and 116:
Page 117 and 118:
Page 119 and 120:
Page 121 and 122:
Page 123 and 124:
Page 125 and 126:
Page 127 and 128:
Page 129 and 130:
Page 131 and 132:
Page 133 and 134:
Page 135 and 136:
Page 137 and 138:
Page 139 and 140:
Page 141 and 142:
Page 143 and 144:
Page 145 and 146:
Page 147 and 148:
Page 149 and 150:
Page 151 and 152:
Page 153 and 154:
Page 155 and 156:
Page 157 and 158:
Page 159 and 160:
Page 161 and 162:
Page 163 and 164:
Page 165 and 166:
Page 167 and 168:
Page 169 and 170:
Page 171 and 172:
Page 173 and 174:
Page 175 and 176:
Page 177 and 178:
Page 179 and 180:
Page 181 and 182:
Page 183 and 184:
Page 185 and 186:
Page 187 and 188:
Page 189 and 190:
Page 191 and 192:
Page 193 and 194:
Page 195 and 196:
Page 197 and 198:
Page 199 and 200:
Page 201 and 202:
Page 203 and 204:
Page 205 and 206:
Page 207 and 208:
Page 209 and 210:
Page 211 and 212:
Page 213 and 214:
Page 215 and 216:
Page 217 and 218:
Page 219 and 220:
Page 221 and 222:
Page 223 and 224:
Page 225 and 226:
Page 227 and 228:
Page 229 and 230:
Page 231 and 232:
Page 233 and 234:
Page 235 and 236:
Page 237 and 238:
Page 239 and 240:
Page 241 and 242:
Page 243 and 244:
Page 245 and 246:
Page 247 and 248:
Page 249 and 250:
Page 251 and 252:
Page 253 and 254:
Page 255 and 256:
Page 257 and 258:
Page 259 and 260:
Page 261 and 262:
Page 263 and 264: USGS-NPS Vegetation Mapping Program
Page 313: USGS-NPS Vegetation Mapping Program
Page 365 and 366:
Page 367 and 368:
Page 369:
show all

Vegetation Classification and Mapping Project Report - USGS

Create successful ePaper yourself

Delete template?

Save as template?