| Main Title |
Phytoplanktonic Nitrogen as an Index of Cultural Eutrophication. |
| Author |
Wetze, Robert G. ;
Mann, Bruce A. ;
|
| CORP Author |
Michigan State Univ., Hickory Corners. W. K. Kellogg Biological Station. |
| Year Published |
1971 |
| Report Number |
OWRR-B-009-MICH; 01780,; B-009-MICH(1) |
| Stock Number |
PB-204 707 |
| Additional Subjects |
( Biological indicators ;
Nitrogen) ;
( Phytoplankton ;
Biological indicators) ;
( Water pollution ;
Biological indicators) ;
Nutrients ;
Nitrates ;
Ultraviolet radiation ;
Ammonia ;
Eutrophication ;
Water pollution detection
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB-204 707 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
16p |
| Abstract |
Algae less than 10 micro m in diameter are nitrogen rich on a cell volume basis compared to algae larger than 10 micro m in diameter. A procedure for dissolved organic nitrogen (DON) determination in natural waters was developed. The procedure utilized high intensity ultraviolet light to destroy the DON and is 100-fold more sensitive than the micro-Kjeldahl procedure. The procedure can differentiate UV-labile and UV-refractory DON within the DON pool present in a wide variety of natural waterbodies. Secretion of dissolved organic carbon (DOC) and DON by two aquatic macrophytes in axenic culture was directly proportional to increasing carbon fixation rates, light intensity, pH, cationic concentration and organic carbon concentration. (Author) |
