THE LIFE OF DEVIDS LAKE 111 



CONCLUSIONS 



1. The Devils Lake complex comprises a series of large shallow 

 pools of alkaline water ; which were originally parts of a large, deep, 

 fresh water lake; in which certain organisms, finding conditions 

 favorable for their existence, develop at certain times in enormous 

 numbers; while other organisms, though present in adjacent waters, 

 are rare or ab.sent. 



2. Conditions in the different parts of the complex vary, es- 

 pecially in respect to depth and chemical character. In response 

 to these changing conditions marked changes in their faunas and 

 floras have occurred and are progressing. 



3. The character of these latter is that of fresh water, being 

 distinguished therefrom rather by the absence of many fresh water 

 species, than by the presence of many brackish or marine types, tho 

 a few of these occur. 



4. The source of fauna and flora is manifold. They are not 

 characteristic of any particular region, but are rather cosmopolitan 

 in aspect. 



BIBLIOGRAPHY 



1920 American Public Health Association, Standard Methods for 

 the Examination of Water and Sewage — Ith Ed. 



1920 Anderson, E. M. & Walker, E. R. An ecological study of the 

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 XXXIX, pp. 51-85. 



1896 Apstein, C. Das Siisswasserplankton. Lipsius and Tischer. 

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1912 Atkinson, T. R. Proposed diversion of ]\Iouse River to Devils 

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1922 Bailey, L. W. Diatoms from the Quill Lakes, Saskat- 

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1897 Birge, E. A. Plancton studies on Lake IMendota II. The 

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1914 A limnological study of the finger lakes of New York. Bull. 

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1921 Further limnological observations on the finger lakes of New 

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1911 Brannon, M. A. First Biennial Report of the North Dakota 

 Biological Station (1909-10), State Pub. 



1913 Second Biennial Report of the North Dakota Biological Sta- 

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