A Reconsideration of Grassland Classification in the Northern Great Plains of North America

This is the authors' abstract. We don't add key points for this paper.

INTRODUCTION . 135 DESCRIPTION OF THE AREA 137 CONCEPTS OF VEGETATION ANALYSIS 141 LOCATION OF STUDY AREAS . . . . . . . . . 144 CLIMAX COMMUNITIES . . . . . . . . 145 Fescue Prairie Association . . . . 145 Mixed Prairie Association . . . . . . . 147 Stipa-Agropyron Faciation . . . . . . 147 Stipa-Bouteloua-Agropyron Faciation . . . . . . 150 Stipa-Bouteloua Faciation . . . . . . . 152 Bouteloua-Agropyron Faciation . . . . . . 153 Agropyron-Koeleria Faciation . . . . . . 155 FORBS AND SHRUBS . . . . . . . . . 156 COMPARISON WITH PREVIOUS CLASSIFICATIONS . . . 158 SUCCESSIONAL COMMUNITIES . . . . . . 159 Primary successions . . . . . . . . 160 Secondary successions . . . . . . . . 163 RELATION TO COMMUNITIES IN THE NORTHERN UNITED STATES. . . . 164 SUMMARY . . . . . . . . . 165