Ecological Archives A025-051-A1

John S. Kominoski, Amy D. Rosemond, Jonathan P. Benstead, Vladislav Gulis, John C. Maerz, and David W. P. Manning. 2015. Low-to-moderate nitrogen and phosphorus concentrations accelerate microbially driven litter breakdown rates. Ecological Applications 25:856865. http://dx.doi.org/10.1890/14-1113.1

Appendix A. Saturation responses of leaf litter breakdown rates (k d-1) vs. soluble reactive phosphorus and dissolved inorganic nitrogen.

Table A1. Michaelis-Menten model results relating dissolved inorganic nitrogen (DIN; mg L-1) and soluble reactive phosphorus (SRP; mg L-1) effects on maple (Acer rubrum) and rhododendron (Rhododendron maximum) leaf litter breakdown rates (k d-1). Km is the half-saturation constant of DIN and SRP concentrations whereby the process rate is half of Vmax (the maximum breakdown rate). Data for R. maximum k vs. DIN are not reported because of poor model fits.

 

DIN

 

SRP

 

Vmax

Km

 R² adj.; P value

 

Vmax

Km

 R² adj.; P value

Acer rubrum k

0.020

25.07

0.23,   0.010

 

0.020

  4.93

    0.30,    0.003

Rhododendron maximum k

-

-

-    ,    -

 

0.010

14.64

0.73, < 0.001


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