| Lines 22-30 were replaced by lines 22-32 |
| - # (Briggs and Knapp 1995) J. Briggs and K. Knapp. Interannual variability in primary productivity in tallgrass prairie: climate, soil moisture, topographic position, and fire as determinants of aboveground biomass. Am. J. Bot. 82:1024-1030, 1995. |
| - # (Chapin et al. 1995) F. Chapin III, R. Shaver, A. Giblin, et al. Responses of artic tundra to experimental and observed changes in climate. Ecology 76:694-711, 1995. |
| - # (Gross et al. 1999) K. Gross, M. Willig, L. Gough, R. Inouye, S. Cox. et al. Patterns of species density and productivity at different spatial scales in herbaceous plant communities. OIKOS 89:417-427, 2000. |
| - # (Huberty et al. 1998) L. Huberty, K. Gross, and C. Miller. Effects of nitrogen addition on successional dynamics and diversity in Michigan old-fields. J. Ecol. 86:794-803, 1998. |
| - # (Inouye et al. 1987) R. Inouye, N. Huntley, D. Tilman, et al. Old-field succession on a Minnesota sandplain. Ecology 68:12-26, 1987. |
| - # (Inouye 1998) R. Inouye. Species-area curves and estimates of total species richness in an old-field chronosequence. Plan Ecol. 37:31-40, 1998. |
| - # (Milchunas et al. 1990) D. Milchunas, W. Laurenroth, P. Chapman, and M. Kazempour. Community attributes along a perturbation gradient in a shortgrass steppe. J. Veg. Sci. 1:375-384, 1990. |
| - # (Shaver 1986) G. Shaver. Woody stem productions in Alaskan tundra shrubs. Ecology 67:660-669, 1986. |
| - # (Walker et al. 1994) M. Walker, J. Webber, E. Arnold, and D. Ebert-May. Effects of interannual climate variation on above-ground phytomass in alpine vegetation. Ecology 75:393-408. |
| + __References__ |
| + |
| + # ''(Briggs and Knapp 1995)'' J. Briggs and K. Knapp. Interannual variability in primary productivity in tallgrass prairie: climate, soil moisture, topographic position, and fire as determinants of aboveground biomass. Am. J. Bot. 82:1024-1030, 1995. |
| + # ''(Chapin et al. 1995)'' F. Chapin III, R. Shaver, A. Giblin, et al. Responses of artic tundra to experimental and observed changes in climate. Ecology 76:694-711, 1995. |
| + # ''(Gross et al. 1999)'' K. Gross, M. Willig, L. Gough, R. Inouye, S. Cox. et al. Patterns of species density and productivity at different spatial scales in herbaceous plant communities. OIKOS 89:417-427, 2000. |
| + # ''(Huberty et al. 1998)'' L. Huberty, K. Gross, and C. Miller. Effects of nitrogen addition on successional dynamics and diversity in Michigan old-fields. J. Ecol. 86:794-803, 1998. |
| + # ''(Inouye et al. 1987)'' R. Inouye, N. Huntley, D. Tilman, et al. Old-field succession on a Minnesota sandplain. Ecology 68:12-26, 1987. |
| + # ''(Inouye 1998)'' R. Inouye. Species-area curves and estimates of total species richness in an old-field chronosequence. Plan Ecol. 37:31-40, 1998. |
| + # ''(Milchunas et al. 1990)'' D. Milchunas, W. Laurenroth, P. Chapman, and M. Kazempour. Community attributes along a perturbation gradient in a shortgrass steppe. J. Veg. Sci. 1:375-384, 1990. |
| + # ''(Shaver 1986)'' G. Shaver. Woody stem productions in Alaskan tundra shrubs. Ecology 67:660-669, 1986. |
| + # ''(Walker et al. 1994)'' M. Walker, J. Webber, E. Arnold, and D. Ebert-May. Effects of interannual climate variation on above-ground phytomass in alpine vegetation. Ecology 75:393-408. |
