| Main Title |
Phosphorus Enrichment, Silica Utilization, and Biogeochemical Silica Depletion in the Great Lakes. |
| Author |
Schelske, C. L. ;
Stoermer, E. F. ;
Fahnenstiel, G. L. ;
Haibach, M. ;
|
| CORP Author |
Michigan Univ., Ann Arbor. Great Lakes Research Div.;Environmental Research Lab.-Duluth, MN.;National Science Foundation, Washington, DC. |
| Publisher |
c1986 |
| Year Published |
1986 |
| Report Number |
EPA-R-806294 ;NSF-OCE82-16588; EPA/600/J-86/522; |
| Stock Number |
PB90-142936 |
| Additional Subjects |
Phosphorus ;
Great Lakes ;
Silicon dioxide ;
Diatoms ;
Bioassay ;
Geochemistry ;
Biochemistry ;
Lake Erie ;
Lake Ontario ;
Inorganic phosphates ;
Dissolution ;
Concentration(Composition) ;
Sedimentation ;
Thermal stratification ;
Recycling
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB90-142936 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
11p |
| Abstract |
The hypothesis that silica (Si) depletion in Lake Michigan and the severe Si depletion that characterizes the lower Great Lakes were induced by increased phosphorus (P) inputs was supported by bioassay experiments showing increased Si uptake by diatoms with relatively small P enrichments. The authors propose that severe Si depletion (Si concentrations being reduced to less than 0.39 mg SiO L prior to thermal stratification) results when P levels are increased to the extent that increased diatom production reduces Si concentrations to limiting levels during the thermally mixed period. The model proposed for biogeochemical Si depletion is consistent with previous findings of high rates of internal recycling because, under steady-state conditions for Si inputs, any increase in diatom production will produce an increase in permanent sedimentation of biogenic Si provided some fraction of the increased biogenic Si production is not recycled or unless there is a compensating increase in dissolution of diatoms. |
| Supplementary Notes |
Pub. in Canadian Jnl. of Fisheries and Aquatic Science, v43 p407-415 1986. Sponsored by Environmental Research Lab.-Duluth, MN., and National Science Foundation, Washington, DC. |
| NTIS Title Notes |
Journal article. |
| Category Codes |
68D; 48G; 48F; 57B |
| NTIS Prices |
PC A03/MF A01 |
| Primary Description |
600/03 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
007529506 |
| Origin |
NTIS |
| Type |
CAT |
