Record Display for the EPA National Library Catalog
RECORD NUMBER: 142 OF 789| Main Title | Comparative Study of Standing Crops and of Phosphorus and Nitrogen Contents of Four Macrophyte Stream Communities. | |||||||||||
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| Author | Popma., Thomas J. ; | |||||||||||
| CORP Author | Michigan State Univ., East Lansing. Dept. of Fisheries and Wildlife. | |||||||||||
| Year Published | 1971 | |||||||||||
| Report Number | DI-14-31-0001-3153; OWRR-C-3381(3723) ;OWRR-C-2205(3386); W72-02307 ; OWRR-C-3381(3723)(4) | |||||||||||
| Stock Number | PB-231 766 | |||||||||||
| Additional Subjects | Aquatic plants ; Water quality ; Biological productivity ; Plant tissues ; Nitrogen ; Phosphorus ; Biomass ; Fresh water biology ; Chemical properties ; Jordan River ; Au Sable River ; Red Cedar River ; Michigan ; Theses ; Standing crops ; Eutrophication ; Water pollution effects(Plants) | |||||||||||
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| Collation | 57p | |||||||||||
| Abstract | Four 100 meter study sections were chosen in three Michigan streams to evaluate the influence of varying levels of eutrophication upon submerged macrophyte communities. Choice of study sites was based upon appearance of the streams and prior estimates of physical, chemical, and biological parameters. Phosphorus content within plant tissue reflected concentrations in the water. The percentage of phosphorus in tissue was high in spring, but could not be shown to change significantly during the latter part of the growing season. Nitrogen content in tissues appeared to remain at levels required to maintain constant N:P ratios rather than reflect water concentrations. (Author) |