| Species |
ǂLAI-2009 |
LAI-2010 |
LAI-2011 |
LAI-mean |
N (g/m2ground area)§ |
| Artemisia ludoviciana |
0.0373 |
0.0788 |
0.1524 |
0.0895 |
0.0467 |
| Poapratensis |
0.0321 |
0.0766 |
0.1665 |
0.0917 |
0.0426 |
| Solidagomissouriensis |
0.0452 |
0.0665 |
0.0749 |
0.0622 |
0.0387 |
| Bromusinermis |
0.0301 |
0.0707 |
0.1337 |
0.0782 |
0.0331 |
| Stipaviridula |
0.0128 |
0.0245 |
0.0502 |
0.0292 |
0.0250 |
| Aster ericoides |
0.0115 |
0.0253 |
0.0407 |
0.0259 |
0.0205 |
| Grindelia squarrosa |
0.0353 |
0.047 |
0.0456 |
0.0426 |
0.0184 |
| Oligoneuronrigidum |
0.0111 |
0.0322 |
0.0328 |
0.0253 |
0.0157 |
| Carexspp. |
0.0199 |
0.019 |
0.0155 |
0.0181 |
0.0145 |
| Achilleamillefolium |
0.008 |
0.0194 |
0.0584 |
0.0286 |
0.0138 |
| Taraxacumofficinale |
0.0188 |
0.0367 |
0.0394 |
0.0317 |
0.0124 |
| Geumtriflorum |
0.0038 |
0.0129 |
0.0209 |
0.0125 |
0.0118 |
| Boutelouagracilis* |
0.0081 |
0.0155 |
0.0286 |
0.0174 |
0.0114 |
| Artemisia frigida |
0.0134 |
0.0134 |
0.0158 |
0.0142 |
0.0111 |
| Symphoricarposoccidentalis |
0.0128 |
0.018 |
0.0255 |
0.0188 |
0.0100 |
| Cerastiumarvense |
0.0054 |
0.0186 |
0.0176 |
0.0139 |
0.0089 |
| Antennarianeglecta |
0.0088 |
0.0143 |
0.0265 |
0.0165 |
0.0077 |
| Oxalis stricta* |
0 |
0.0035 |
0.0309 |
0.0115 |
0.0076 |
| Dichantheliumwilcoxianum* |
0.0043 |
0.004 |
0.0244 |
0.0109 |
0.0072 |
| Medicagolupulina* |
0.0017 |
0.0104 |
0.0187 |
0.0103 |
0.0068 |
| Ratibidacolumnifera* |
0.0018 |
0.0075 |
0.0202 |
0.0098 |
0.0064 |
| Stipacurtiseta* |
0 |
0.0151 |
0.0112 |
0.0088 |
0.0058 |
| Cirsiumflodmanii |
0 |
0.0069 |
0.0252 |
0.0107 |
0.0055 |
| Astragalusflexuosus* |
0.0026 |
0 |
0.0198 |
0.0074 |
0.0049 |
| Astragalusagrestis* |
0.0026 |
0.0121 |
0.0071 |
0.0073 |
0.0048 |
| Anemone cylindrica* |
0.0028 |
0.0042 |
0.0143 |
0.0071 |
0.0047 |
| Viola pedatifida* |
0.001 |
0.0043 |
0.0137 |
0.0063 |
0.0041 |
| Lactucatatarica* |
0.0006 |
0.0014 |
0.006 |
0.0027 |
0.0018 |
| Sphaeralceacoccinea* |
0.0011 |
0.0031 |
0.0028 |
0.0023 |
0.0015 |
| Viciaamericana* |
0 |
0.0003 |
0.0027 |
0.001 |
0.0007 |
| Potentillapensylvanica* |
0.0003 |
0 |
0.0024 |
0.0009 |
0.0006 |
| Pascopyrumsmithii |
0 |
0 |
0.0017 |
0.0006 |
0.0005 |
| Ambrosia psilostachya |
0.0008 |
0.0003 |
0 |
0.0004 |
0.0003 |
| Euphorbia serpyllifolia* |
0 |
0.0013 |
0 |
0.0004 |
0.0003 |
| Helianthus pauciflorus |
0 |
0.0005 |
0 |
0.0002 |
0.0002 |
| Agrostishyemalis* |
0 |
0.0009 |
0 |
0.0003 |
0.0002 |
| Onosmodium, molle* |
0 |
0.0008 |
0 |
0.0003 |
0.0002 |
| Polygonum convolvulus* |
0 |
0.0001 |
0 |
0 |
0.0000 |
| Total |
0.3340 |
0.6661 |
1.1461 |
0.7155 |
0.4703 |
|
| ǂLAI was measured five times from May to September in 2009 through 2011. Value for each species was estimated by the relative leaf area occurring within 1×1 m frames
as well as the absolute total seasonal LAI measured using a ceptometer (see main text for detail). |
| §Leaf nitrogen per unit ground area for each species was estimated by multiplying LAI of each species by area-based leaf nitrogen concentration (based on Figure 4). |
| *Species for which leaf nitrogen was not measured and an average value of 0.66 g/m2 (based on 25 species) was assumed. |
| Table 4: Leaf area indices (LAI) and leaf nitrogen per unit ground area for 38 plant species found in a heavily grazed pasture in the mixed-grass prairie near Streeter N.D.,
USA. |
