| Main Title |
Photosynthetic Pigments of Lake Superior Periphyton and Their Relation to Primary Productivity. |
| Author |
Stoke, Lee W. ;
Olso, Theodore A. ;
Odlau, Theron O. ;
|
| CORP Author |
Minnesota Univ., Minneapolis. Water Resources Research Center. |
| Year Published |
1970 |
| Report Number |
WRRC-Bull-18; OWRR-A-011-MINN; A-011-Minn(9),; 06238 |
| Stock Number |
PB-191 523 |
| Additional Subjects |
( Plankton ;
Photosynthesis) ;
Marine biology ;
Organic pigments ;
Chlorophylls ;
Respiration ;
Light ;
Intensity ;
Algae ;
Carbon ;
Ecology ;
Lakes ;
Periphyton ;
Eutrophication ;
Food chains ;
Lake Superior
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB-191 523 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
163p |
| Abstract |
The biomass, community structure, and photosynthetic activity of epilithic periphyton of the north shore of Lake Superior were investigated during the summers of 1966, 1967, and 1968. Pigment ratios indicated predominance of Chrysophyta. The standing crop on oven-dry basis was 156 gram/square meter. Net production in 1967 averaged 1.01 gram carbon fixed per square meter/day. Daily increment of chlorophyll was 0.57 milligram/square meter. Up to 40 foot depth, periphyton can be 5 to 6 times as important in primary production as the phytoplankton. Q-sub-10 for conditioned samples at light saturation ranged from 1.24 to 2.48. The compensation point varied from 80 to 130 foot-candles. The efficiency of energy utilization by periphyton was 0.82, a value typical for algal communities. It is assumed that periphyton will provide a baseline for estimating the advance of eutrophication of Lake Superior. (WRSIC abstract) |
| PUB Date Free Form |
Jan 70, |
| Category Codes |
6F; 8G; 57H; 64H; 57C |
| NTIS Prices |
PC A08 MF A01 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
326511948 |
| Origin |
NTIS |
| Type |
CAT |
