Main Title |
Response of phytoplankton to acidification in experimental streams |
Author |
Weber, T. W.
|
CORP Author |
Minnesota Univ., Minneapolis.;Environmental Research Lab.-Duluth, Monticello, MN. Monticello Ecological Research Station. |
Publisher |
University of Minnesota ; |
Year Published |
1981 |
Report Number |
EPA 600/3-81-042 ; PB81216822 |
Stock Number |
PB81-216822 |
OCLC Number |
26252671 |
Subjects |
Stream ecology--Minnesota--Monticello ;
Acidity function ;
Phytoplankton ;
Plants, Effect of acids on
|
Additional Subjects |
Phytoplankton ;
Acidification ;
Toxicology ;
Sampling ;
Responses ;
Mississippi River ;
pH ;
Sulfuric acid ;
Plants(Botany) ;
Biomass ;
Streams ;
Water pollution ;
Reviews ;
In vivo analysis ;
Monticello(Minnesota) ;
Water pollution effects(Plants) ;
Toxic substances
|
Internet Access |
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
ELDD |
EPA 600/3-81-042 |
|
CCTE/GLTED Library/Duluth,MN |
06/28/2010 |
NTIS |
PB81-216822 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
v, 46 p. : ill. ; 28 cm. |
Abstract |
In order to examine the response of stream phytoplankton communities to acidification, three artificial streams along the Mississippi River were sampled at biweekly intervals. This study took place at Monticello, Minnesota, during late spring-early summer, 1979. One stream served as a control with an ambient pH of 8.1, and two streams were maintained at pH 6.3 and 5.3 by the addition of sulfuric acid. The streams provided a unique replicate system whereby physical and chemical parameters could be controlled and continually monitored in a field situation. The phytoplankton samples were filtered onto membrane filters and the constituent phytoplankton species were enumerated. The diversity of phytoplankton was similar throughout all three pH regimes. However, phytoplankton community similarity decreased over the course of the six week experimental period. Biomass, measured by in vivo chlorophyll fluorescence and as the density of the algal cells, showed a similar pattern. The pattern of algal community development differed across the pH treatments. The phytoplankton at pH 6.3 and 8.1 attained their maximum biomass during the first month of sampling (June). There is a lag in the population maxima of phytoplankton at pH 5.3, possibly due to a slower division rate caused by a less than ideal pH environment. Species composition was nearly identical across the pH range, dominated by diatoms in each stream. The most extreme pH value, pH 5.3, seemed to be a sublethal value for the diatoms existing there. |
Notes |
Report date: June 1981. Thesis (M.S.)--University of Minnesota, 1980. Includes bibliographical references (p. 26-29). |
Place Published |
Minneapolis : |
Corporate Au Added Ent |
Environmental Research Laboratory (Duluth, Minn.) |
PUB Date Free Form |
{1981} |
NTIS Prices |
PC A04/MF A01 |
BIB Level |
m |
Cataloging Source |
OCLC/T |
OCLC Time Stamp |
20020909120956 |
Language |
eng |
Origin |
OCLC |
Type |
MERGE |
OCLC Rec Leader |
01120cam 2200301Ia 45020 |