Allison, T. D. 1991. Variation in sex expression in Canada yew (Taxus Canadensis). American Journal of Botany 78(4):569-578.    [1007  Abstract  Full Text  LTER]

Davis, M. A.; Johnson, G. W. 1991. A simple and inexpensive method of obtaining low-altitude photographs of vegetation using a tethered balloon. Prairie Naturalist 23(3):153-164.    [1035  Abstract  Full Text  LTER]

Davis, M. A.; Villinski, J.; Banks, K.; Buckman-Fifield, J.; Dicus, J.; Hofmann, S. 1991. Combined effects of fire, mound-building by pocket gophers, root loss and plant size on growth and reproduction in Penstemon grandiflorus. American Midland Naturalist 125:150-161.    [1038  Abstract  Full Text  E133  LTER]

Davis, M. A.; Villinski, J.; McAndrew, S.; Scholtz, H.; Young, E. 1991. Survivorship of Penstemon grandiflorus in an oak woodland: combined effects of fire and pocket gophers. Oecologia 86:113-118.    [1039  Abstract  Full Text  E133  LTER]

Gorham, E. 1991. Northern peatlands: role in the carbon cycle and probable responses to climatic warming. Ecological Applications 1:182-195.    [1055  Abstract  Full Text  LTER]

Hairston, A. B.; Grigal, D. F. 1991. Topographic influences on soils and trees within single mapping units on a sandy outwash landscape. Forest Ecology and Management 43:35-45.    [1065  Abstract  Full Text  LTER]

Howitz, J. L. 1991. A case of polyandry in black-capped chickadees. The Loon 63:152-154.    [1339  Abstract  Full Text  CC]

Huntly, N. 1991. Herbivores and the dynamics of communities and ecosystems. Annu. Rev. Ecol. Syst. 22:477-503.    [1070  Full Text  LTER]

Johnson, N. C. 1991. Plant and soil regulation of mycorrhizae in natural and agricultural ecosystems. Ph.D. Thesis, University of Minnesota.   [1083  LTER]

Johnson, N. C.; Pfleger, F. L.; Crookston, R. K.; Simmons, S. R.; Copeland, P. J. 1991. Vesicular-arbuscular mycorrhizas respond to corn and soybean cropping history. New Phytologist 117:657-663.    [1089  Abstract  Full Text  LTER]

Johnson, N. C.; Zak, D. R.; Tilman, D.; Pfleger, F. L. 1991. Dynamics of vesicular-arbuscular mycorrhizae during old field succession. Oecologia 86:349-358.    [1087  Abstract  Full Text  E014  LTER]

McKane, R. B. 1991. Regulation of carbon and nitrogen cycling and plant community structure during old-field succession. Ph.D. Thesis, University of Minnesota.   [1101  LTER]

Nicolai, V. 1991. Reactions of the fauna on the bark of trees to the frequency of fires in a North American savanna. Oecologia 88:132-137.    [1453  Abstract  Full Text  E133  CC]

Reichman, O. J.; Smith, S. C. 1991. Responses to simulated leaf and root herbivory by a biennial, Tragopogon dubius. Ecology 72:116-124.    [1126  Abstract  Full Text  LTER]

Strauss, S. Y. 1991. Direct, indirect, and cumulative effects of three native herbivores on a shared host plant. Ecology 72(2):543-558.    [1147  Abstract  Full Text  LTERCC]

Suhartoyo, H. 1991. Analysis of vegetation of the Cedar Creek Natural History Area using methods of classification and ordination. M.S. Thesis, University of Minnesota.   [1148  LTER]

Tilman, D. 1991. Relative growth rates and plant allocation patterns. The American Naturalist 138:1269-1275.    [1175  Abstract  Full Text  LTER]

Tilman, D. 1991. The schism between theory and ardent empiricism: a reply to Shipley and Peters. The American Naturalist 138:1283-1286.    [1176  Abstract  Full Text  LTER]

Tilman, D.; Olff, H. 1991. An experimental study of the effects of pH and nitrogen on grassland vegetation. Acta Oecologica 12(3):427-441.    [1188  Abstract  Full Text  LTER]

Tilman, D.; Wedin, D. 1991. Dynamics of nitrogen competition between successional grasses. Ecology 72:1038-1049. (Highlighted in Trends in Ecology and Evolution, 1991).    [1185  Abstract  Full Text  LTER]

Tilman, D.; Wedin, D. 1991. Oscillations and chaos in the dynamics of a perennial grass. Nature 353:653-655. (Highlighted in The New York Times and other media.)    [1186  Abstract  Full Text  LTER]

Tilman, D.; Wedin, D. 1991. Plant traits and resource reduction for five grasses growing on a nitrogen gradient. Ecology 72(2):685-700. (Highlighted in Trends in Ecology and Evolution, 1991.).    [1187  Abstract  Full Text  LTER]

Wedin, D. A. 1991. Components of nitrogen-use-efficiency in perennial grasses. Bulletin of Ecological Society of America 72:283 (abstract).   [1204  LTER]

Wilson, S. D.; Tilman, D. 1991. Components of plant competition along an experimental gradient of nitrogen availability. Ecology 72:1050-1065.    [1214  Abstract  Full Text  LTER]

Wilson, S. D.; Tilman, D. 1991. Interactive effects of fertilization and disturbance on community structure and resource availability in an old-field plant community. Oecologia 88:61-71.    [1215  Abstract  Full Text  LTER]

Zak, D. R.; Grigal, D. F. 1991. Nitrogen mineralization, nitrification and denitrification in upland and wetland ecosystems. Oecologia 88:189-196.    [1218  Abstract  Full Text  LTER]

Zak, D. R.; Hairston, A.; Grigal, D. F. 1991. Topographic influences on nitrogen cycling within an upland pin oak ecosystem. Forest Science. 37(1):45-53.    [1219  Abstract  Full Text  LTER]

Zinnel, K. C.; Tester, J. R. 1991. Implanting radio transmitters in plains pocket gophers. Prairie Naturalist 23(1):35-40.    [1223  Abstract  Full Text  LTER]