1987 Wetland Delineation Manual - The Wetlands Regulation Center

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Wetland Delination Manual, 1987 96 Table C1 (Continued) Partial List of Species With Known Morphological Adaptations for Occurrence in Wetlands* Species Common Name Adaptation Nyssa sylvatica Swamp blackgum Buttressed trunks var. biflora Platanus occidentalis Sycamore Adventitious roots Populus deltoides Cottonwood Adventitious roots Quercus laurifolia Laurel oak Shallow root system Quercus palustris Pin oak Adventitious roots Rhizophora mangle Red mangrove Pneumatophores Sagittaria spp. Arrowhead Polymorphic leaves Salix spp. Willow Hypertrophied lenticels; adventitious roots; oxygen pathway to roots Scirpus spp. Bulrush Inflated stems and leaves Spartina alterniflora Smooth Oxygen pathway to roots cordgrass Taxodium distichum Bald cypress Buttressed trunks; pneumatophores * Many other species exhibit one or more morphological adaptations for occurrence in wetlands. However, not all individuals of a species will exhibit these adaptations under field conditions, and individuals occurring in uplands characteristically may not exhibit them. 25 February 1997 Environmental Techncal Services Co. 834 Castle Ridge Rd Austin, Texas 78746
Wetland Delination Manual, 1987 97 Table C2 Species Exhibiting Physiological Adaptations for Occurrence in Wetlands Species Physiological Adaptation Alnus incana Increased levels of nitrate reductase; malate accum. Alnus rubra Increased levels of nitrate reductase Baccharis viminea Ability for root growth in low oxygen tensions Betula pubescens Oxidizes the rhizosphere; malate accumulation Carex arenaria Malate accumulation Carex flacca Absence of ADH activity Carex lasiocarpa Malate accumulation Deschampsia cespitosa Absence of ADH activity Filipendula ulmaria Absence of ADH activity Fraxinus pennsyzvanica Oxidizes the rhizosphere Glyceria maxima Malate accumulation; absence of ADH activity Juncus effusus Ability for root growth in low oxygen tensions; absence of ADH activity Larix laricina Slight increases in metabolic rates; increased levels of nitrate reductase Lobelia dortmanna Oxidizes the rhizosphere Lythrum salicaria Absence of ADH activity Molinia caerulea Oxidizes the rhizosphere Myrica gale Oxidizes the rhizosphere Nuphar lutea Organic acid production Nyssa aquatica Oxidizes the rhizosphere Nyssa sylvatica var. biflora Oxidizes the rhizosphere; malate accumulation Phalaris arundinacea Absence of ADH activity; ability for root growth in low oxygen tensions Phragmites australis Malate accumulation Pinus contorta Slight increases in metabolic rates; increased levels of nitrate reductase Polygonum amphibium Absence of ADH activity Potentilla anserina Absence of ADH activity; ability for root Ranunculus flammula Malate accumulation; absence of ADH activity Salix cinerea Malate accumulation Salix fragilis Oxidizes the rhizosphere Salix lasiolepis Ability for root growth in low oxygen tensions Scirpus maritimus Ability for root growth in low oxygen tensions Senecio vulgaris Slight increases in metabolic rates Spartina alterniflora Oxidizes the rhizosphere Trifoliun subterraneum Low ADH activity Typha angustifolia Ability for root growth in low oxygen tensions 25 February 1997 Environmental Techncal Services Co. 834 Castle Ridge Rd Austin, Texas 78746
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1987 Wetland Delineation Manual - The Wetlands Regulation Center

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