



190 
estimated by applying each percentage of species composition to the minimum, 
state-wide breeding population, 
Table I, - Physiographic Distribution of Water Areas of All Types, and 1954-1955 
Trends. 
Total Water 
Physiographic Areas Per Square Mile 
Division 1954 = ””:~(“‘<s«~S SHH Change 
Minnesota Valley 8. 81 3.92 ~ 56% 
Prairie Hills 10.61 3.16 - 70% 
James River Valley 6.56 2.92 - 56% 
Missouri Hills 3.13 2.50 - 20% 
Missouri Plateau 2.49 1. 86 - 25% 
State-wide * 4.64 2.35 - 49% 
* Based on twice the number of water areas and square miles 
sampled on the Missouri Plateau to compensate for 
reduced coverage of the Missouri Plateau, 
