Table 3.
Species number as labelled in Fig. 1, list of species included in our experiment, their position on our first two PCA axes and their C value in Rothrock and Homoya (2005).
| Number | Species name | PC1 | PC2 | CC |
|---|---|---|---|---|
| 1 | Abutilon theophrasti | −0.57 | −0.27 | 0 |
| 2 | Allium cernuum | 0.36 | −0.43 | 4 |
| 3 | Ambrosia artemisiifolia | −0.57 | −0.23 | 1 |
| 4 | Amorpha canescens | 0.36 | −0.03 | 9 |
| 5 | Andropogon virginicus | −0.12 | 0.38 | 1 |
| 6 | Asclepias incarnata | −0.18 | −0.01 | 4 |
| 7 | Asclepias syriaca | −0.17 | −0.15 | 1 |
| 8 | Asclepias tuberosa | 0.06 | 0.04 | 4 |
| 9 | Asclepias verticillata | 0.00 | −0.17 | 5 |
| 10 | Aster laevis | 0.34 | 0.27 | 10 |
| 11 | Aster novae-angliae | 0.10 | 0.23 | 3 |
| 12 | Baptisia alba | 0.33 | −0.13 | 10 |
| 13 | Bidens bipinnata | −0.31 | 0.23 | 2 |
| 14 | Cacalia atriplicifolia | 0.44 | −0.20 | 6 |
| 15 | Carex scoparia | −0.25 | 0.27 | 4 |
| 16 | Carex tribuloides | −0.32 | 0.38 | 5 |
| 17 | Carex vulpinoidea | −0.35 | 0.22 | 2 |
| 18 | Chamaecrista fasciculata | −0.16 | 0.12 | 2 |
| 19 | Chenopodium album | −0.11 | 0.45 | 0 |
| 20 | Conyza canadensis | −0.30 | 0.68 | 0 |
| 21 | Coreopsis tripteris | 0.08 | 0.36 | 8 |
| 22 | Desmodium illinoense | 0.19 | −0.12 | 5 |
| 23 | Echinacea pallida | 0.46 | −0.22 | 10 |
| 24 | Echinacea purpurea | 0.44 | 0.07 | 6 |
| 25 | Elymus canadensis | −0.62 | −0.03 | 5 |
| 26 | Eryngium yuccifolium | 0.32 | 0.07 | 10 |
| 27 | Setaria faberi | −1.07 | −0.33 | 0 |
| 28 | Helianthus grossesseratus | 0.04 | −0.03 | 3 |
| 29 | Heliopsis helianthoides | 0.23 | 0.08 | 4 |
| 30 | Helianthus occidentalis | 0.39 | −0.19 | 9 |
| 31 | Koeleria cristata | 0.35 | 0.46 | 8 |
| 32 | Lespedeza capitata | −0.02 | 0.03 | 4 |
| 33 | Monarda fistulosa | 0.04 | 0.14 | 3 |
| 34 | Oenothera biennis | −0.07 | −0.18 | 0 |
| 35 | Panicum capillare | −0.64 | −0.12 | 0 |
| 36 | Panicum virgatum | −0.23 | 0.10 | 4 |
| 37 | Parthenium integrifolium | 0.34 | −0.23 | 9 |
| 38 | Penstemon digitalis | 0.23 | −0.01 | 4 |
| 39 | Physostegia virginiana | −0.05 | 0.01 | 5 |
| 40 | Polygonum pennsylvanicum | −0.66 | 0.21 | 0 |
| 41 | Pycnanthemum virginianum | 0.06 | 0.47 | 5 |
| 42 | Ratibida pinnata | 0.47 | 0.10 | 5 |
| 43 | Rudbeckia hirta | 0.30 | −0.06 | 2 |
| 44 | Rumex crispus | −0.32 | −0.78 | 0 |
| 45 | Schizachyrium scoparium | −0.26 | 0.03 | 4 |
| 46 | Silphium integrifolium | 0.43 | −0.29 | 7 |
| 47 | Silphium terebinthinaceum | 0.55 | −0.49 | 6 |
| 48 | Sorghastrum nutans | −0.16 | −0.33 | 4 |
| 49 | Sporobolus heterolepis | 0.07 | −0.09 | 10 |
| 50 | Tradescantia ohiensis | −0.20 | −0.72 | 3 |
| 51 | Vernonia altissima | 0.42 | 0.19 | 2 |
| 52 | Veronicastrum virginicum | 0.32 | 0.25 | 8 |