Main Title |
Summer Internal Phosphorus Supplies in Shagawa Lake, Minnesota. |
Author |
Larsen, D. P. ;
Schults, D. W. ;
Malueg, K. W. ;
|
CORP Author |
Corvallis Environmental Research Lab., OR. |
Year Published |
1981 |
Report Number |
EPA/600/J-81/400; |
Stock Number |
PB85-244234 |
Additional Subjects |
Phosphorus ;
Water pollution ;
Shagawa Lake ;
Sediments ;
Summer ;
Chemical properties ;
Anaerobic processes ;
Depth ;
Concentration(Composition) ;
Biological productivity ;
Reprints ;
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB85-244234 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
16p |
Abstract |
Phosphorus budget calculations for Shagawa Lake show that significant increases in lake P during July and August 1971-1975 originated from within the lake basin. Mass increases of 2,000-2,900 kg (35-50 ug/liter) were measusred, corresponding to internal supply rates of 240-680 kg/wk over a 3-9 week interval. After anaerobic conditions developed in late June, release from the profundal zone sediments contributed significant amounts of P to lake water. Sediment chemical properties were determined to estimate the size of the P reservoir in the profundal zone. Although external sources of phosphorus have been reduced by about 80% the feedback of P from the sediments is supporting the productivity of Shagawa Lake and may continue to do so for many years. |
Supplementary Notes |
Pub. in Limnology and Oceanography 26, n4 p740-753 1981. |
NTIS Title Notes |
Journal article. |
Title Annotations |
Reprint: Summer Internal Phosphorus Supplies in Shagawa Lake, Minnesota. |
PUB Date Free Form |
1981 |
Category Codes |
8H; 68D; 48G |
NTIS Prices |
PC A02/MF A01 |
Primary Description |
600/02 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
532617668 |
Origin |
NTIS |
Type |
CAT |