Ecological Archives E089-200-A5

H. M. Valett, S. A. Thomas, P. J. Mulholland, J. R. Webster, C. N. Dahm, C. S. Fellows, C. L. Crenshaw, and C. G. Peterson. 2008. Endogenous and exogenous control of ecosystem function: N cycling in headwater streams. Ecology 89:3515–3527.

Appendix E. Average epilithic standing crops from all injections for each of the three study sites.

TABLE E1. Average epilithic standing crops from all injections for each of the three study sites (n = 8, 8, and 6, respectively). Data are means ± SE. Value in parentheses is CV(coefficient of variation) = [(mean/SD)*100%]. Mean values with different superscripts within a row are significantly different (P < 0.005) as determined by Tukey’s Multiple Comparison Test following one-way ANOVA (site = main effect).


Study Site

 

Coweeta Hydrologic Laboratory (CWT)

 

Oak Ridge National Laboratory (ORNL)

 

North-Central New
Mexico (NCNM)

Autochthonous standing crops:

 

 

 

 

 

 

epilithic organic matter
(AFDM g/m2)

 

3.3 ± 0.8 (66%)

 

2.4 ± 0.7 (79%)

 

6.3 ± 2.2 (85%)

epilithic cholorphyll a (mg/m2)

 

7.0 ± 2.6 (106%)

 

20.8 ± 7.6 (32%)

 

15.7 ± 5.2 (81%)

 

 

 

 

 

 

 

Allochthonous standing stocks:

 

 

 

 

 

 

leaves (AFDM g/m2)

 

47 ± 23 (139%)

 

67 ± 32 (135%)

 

not sampled

wood (g/m2)

 

47B ± 22 (137%)

 

104A ± 24 (63%)

 

not sampled

FPOM surface (g/m2)

 

30B ± 9 (88%)

 

60A ± 14 (68%)

 

not sampled

FPOM subsurface (g/m2)

 

78B ± 22 (82%)

 

146A ± 17 (73%)

 

not sampled


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