A Survey of Potential National Natural Landmarks, Biotic Themes, of the Western Central Lowlands

摘要

This study is one of 61 which cover the natural regions of the United States, defined largely according to Fenneman (1928). Each study describes the ecological and/or geological features characteristic of that region, then evaluates sites representative of the various features. Sites which are outstanding examples are suggested as potential National Natural Landmarks. This report describes 54 areas of ecologic significance throughout the Western portion of the Central Lowlands natural region which extends from the northern border of North Dakota south to the northeastern part of Texas. Sites are classified and given a priority rating based on their representation of terrestrial and aquatic themes and subthemes (plant community types) characteristic of the region.