You are not currently logged in.
Access JSTOR through your library or other institution:
If You Use a Screen ReaderThis content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Periphyton Response to Nutrient Manipulation in Streams Draining Clearcut and Forested Watersheds
Rex L. Lowe, Stephen W. Golladay and Jackson R. Webster
Journal of the North American Benthological Society
Vol. 5, No. 3 (Sep., 1986), pp. 221-229
Stable URL: http://www.jstor.org/stable/1467709
Page Count: 9
You can always find the topics here!Topics: Streams, Diatoms, Watersheds, Periphyton, Taxa, Algae, Hurricanes, Creeks, Calcium, Physiognomy
Were these topics helpful?See somethings inaccurate? Let us know!
Select the topics that are inaccurate.
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Preview not available
Nutrient-releasing artificial substrata were deployed in streams draining clearcut and forested watersheds to evaluate resources potentially limiting to populations of benthic algae. Nitrogen, phosphorus, and calcium were released singly and in combination in the two streams that differed primarily in light availability. Periphyton were harvested after one- and two-month exposure periods and analyzed for chlorophyll. The two-month substrata were additionally analyzed for algal community structure. Algal periphyton in the clearcut stream accumulated more chlorophyll and biovolume than in the forested stream across all nutrient treatments. Algal community structure was significantly different between streams but not between nutrient treatments. Algal physiognomies were also significantly different between streams with filamentous green algae dominating the clearcut stream and erect diatoms dominating the forested stream. Light appears to limit algal accumulation in the forested stream and there is evidence that some populations in the clearcut stream may be nutrient limited. Adequate light also resulted in a more architecturally diverse community.
Journal of the North American Benthological Society © 1986 The University of Chicago Press