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Media type:
E-Article
Title:
Periphyton Production in an Appalachian Mountain Trout Stream
Contributor:
Hornick, L. E.;
Webster, J. R.;
Benfield, E. F.
imprint:
University of Notre Dame, 1981
Published in:The American Midland Naturalist
Language:
English
ISSN:
0003-0031;
1938-4238
Origination:
Footnote:
Description:
<p>Periphyton primary production was investigated in a second-order Appalachian Mountain stream and two of its tributaries. Using<sup>14</sup>C fixation in recirculating chambers, estimates averaged 2.27 mg C m<sup>-2</sup>h<sup>-1</sup>in the mainstream and 1.65 and 1.37 mg C m<sup>-2</sup>h<sup>-1</sup>in the two tributaries. Abiotic factors most influential on primary production rates were light, streamflow and inorganic carbon. Based on annual budgets, the estimated stream energy input attributable to autochthonous primary production was about 3% of allochthonous inputs. However, because of high nutritive value and timing, autochthony may be more important than indicated by annual budgets.</p>