Table 1.
Understory Importance Values for Three Mile Island (TMI), Hawk’s Nest Island (HNI), and Blueberry Island (BI) in 2011. Importance values (IV) are calculated as the sum of relative percent cover and relative frequency.
| Importance | Values | ||
|---|---|---|---|
| Species | TMI | HNI | BI |
| Acer pensylvanicum | 11.400 | 3.150 | 0.000 |
| Acer rubrum | 9.060 | 9.284 | 9.845 |
| Acer saccharum | 1.091 | 0.0 | 0.0 |
| Achillea millefolium | 0.334 | 0.0 | 0.0 |
| Alnus incana ssp. rugosa | 0.00 | 0.0 | 6.543 |
| Amelanchier laevis | 1.027 | 7.180 | 0.0 |
| Apocynum androsaemifolium | 0.00 | 0.0 | 3.061 |
| Aralia nudicaulis | 22.560 | 3.611 | 0.0 |
| Aronia melanocarpa | 0.923 | 6.050 | 0.0 |
| Betula alleghaniensis var. alleghaniensis | 1.552 | 0.0 | 0.0 |
| Betula papyrifera | 2.022 | 10.498 | 0.0 |
| Betula populifolia | 1.035 | 0.0 | 0.0 |
| Comptonia peregrina | 0.748 | 0.0 | 0.0 |
| Coptis trifolia | 0.390 | 0.0 | 0.0 |
| Cornus rugosa | 0.478 | 0.0 | 0.0 |
| Cypripedium acaule | 1.123 | 0.0 | 0.0 |
| Dactylis glomerata | 0.669 | 0.0 | 0.0 |
| Dryopteris clintoniana | 0.430 | 0.0 | 0.0 |
| Erigeron strigosus | 0.653 | 0.0 | 0.0 |
| Eurybia divaricata | 0.334 | 0.0 | 0.0 |
| Eurybia macrophylla | 1.218 | 0.0 | 0.0 |
| Euthamia graminifolia | 0.326 | 0.0 | 0.0 |
| Fagus grandifolia | 12.992 | 0.0 | 0.0 |
| Fragaria vesca ssp. americana | 0.581 | 0.0 | 0.0 |
| Gaultheria procumbens | 3.073 | 49.677 | 16.042 |
| Gaylussacia baccata | 11.917 | 29.061 | 39.356 |
| Goodyera pubescens | 0.334 | 3.025 | 0.0 |
| Hamamelis virginiana | 10.269 | 0.0 | 0.0 |
| Hieracium caespitosum | 1.035 | 0.0 | 0.0 |
| Ilex glabra | 0.00 | 0.0 | 3.061 |
| Ilex verticillata | 0.740 | 0.0 | 0.0 |
| Justicia americana | 0.326 | 7.713 | 0.0 |
| Kalmia angustifolia | 0.366 | 0.0 | 9.912 |
| Lindernia dubia | 0.00 | 0.0 | 3.001 |
| Lonicera canadensis | 1.624 | 0.0 | 0.0 |
| Lycopodium obscurum | 0.326 | 0.0 | 0.0 |
| Lyonia ligustrina | 0.00 | 0.0 | 3.482 |
| Lysimachia quadrifolia | 0.342 | 7.222 | 3.001 |
| Maianthemum canadense | 14.106 | 3.025 | 3.001 |
| Maianthemum racemosum ssp. racemosum | 1.417 | 0.0 | 0.0 |
| Medeola virginiana | 2.890 | 3.067 | 0.0 |
| Melampyrum lineare | 1.330 | 0.0 | 8.346 |
| Mentha arvensis | 0.326 | 0.0 | 0.0 |
| Mitchella repens | 3.638 | 3.946 | 0.0 |
| Nyssa sylvatica | 0.446 | 0.0 | 3.302 |
| Osmunda cinnamomea | 1.114 | 0.0 | 0.0 |
| Osmunda regalis | 0.334 | 0.0 | 0.0 |
| Ostrya virginiana | 4.323 | 0.0 | 0.0 |
| Oxalis stricta | 0.326 | 0.0 | 0.0 |
| Parthenocissus quinquefolia | 0.486 | 0.0 | 0.0 |
| Pinus strobus | 6.998 | 3.109 | 3.001 |
| Plantago major | 0.00 | 0.0 | 4.143 |
| Polygonatum biflorum | 0.430 | 0.0 | 0.0 |
| Polygonatum pubescens | 0.470 | 0.0 | 0.0 |
| Populus grandidentata | 0.350 | 0.0 | 0.0 |
| Prenanthes trifoliolata | 1.783 | 0.0 | 0.0 |
| Prunus serotina | 0.326 | 0.0 | 0.0 |
| Pteridium aquilinum | 9.983 | 5.034 | 0.0 |
| Quercus alba | 0.00 | 6.008 | 0.0 |
| Quercus rubra | 4.642 | 0.0 | 0.0 |
| Robinia hispida | 0.414 | 0.0 | 0.0 |
| Rosa palustris | 0.00 | 0.0 | 4.143 |
| Rubus hispidus | 0.828 | 0.0 | 0.0 |
| Schedonorus pratensis | 1.330 | 0.0 | 0.0 |
| Solidago altissima | 0.334 | 0.0 | 0.0 |
| Solidago caesia | 0.334 | 0.0 | 3.121 |
| Solidago juncea | 0.326 | 0.0 | 0.0 |
| Solidago nemoralis | 0.828 | 0.0 | 10.273 |
| Streptopus amplexifolius | 1.895 | 0.0 | 3.182 |
| Symphyotrichum puniceum var. puniceum | 0.350 | 0.0 | 0.0 |
| Symphyotrichum undulatum | 0.326 | 0.0 | 0.0 |
| Taraxacum officinale | 0.00 | 0.0 | 5.345 |
| Tilia Americana | 0.724 | 0.0 | 0.0 |
| Toxicodendron radicans | 0.462 | 3.192 | 0.0 |
| Trientalis borealis | 6.894 | 3.192 | 3.001 |
| Trifolium aureum | 0.326 | 3.276 | 0.0 |
| Tsuga Canadensis | 12.036 | 18.524 | 11.107 |
| Vaccinium angustifolium | 6.735 | 6.122 | 16.396 |
| Vaccinium corymbosum | 0.541 | 0.0 | 3.001 |
| Vaccinium fuscatum | 0.00 | 5.034 | 21.331 |
| Viburnum acerifolium | 7.619 | 0.0 | 0.0 |
| Viola blanda var. palustriformis | 0.342 | 0.0 | 0.0 |
| Total | 200.00 | 200.00 | 200.00 |