Table 2. Summary of means and standard errors (SE) for ecosystem functions and predator densities for 10 plots over three years across treatments.

	Experiment 1: Plots						Experiment 2: Enclosures
	2009		2010		2011		2011
Function and Predator Abundance	Mean	SE	Mean	SE	Mean	SE	Mean	SE
Nitrogen Mineralization Rate	0.268	0.043	−0.245	0.091	0.825	0.109	0.980	0.071
Nitrification Rate	−0.002	0.003	0.008	0.003	−0.001	0.001	−0.020	0.014
Proportion acorns germinated	0.213	0.048	0.085	0.042	0.010	0.006	0.443	0.072
Litterbag Decomposition Rate (g g−1yr−1)	0.302	0.011	0.190	0.013	0.263	0.013	0.524	0.035
Litterbox Decomposition (g g−1 yr−1)	0.125	0.028	0.176	0.038	0.252	0.028	0.392	0.011
Wood Decomposition (g g−1 yr−1)	0.353	0.038	0.237	0.040	0.144	0.020	0.867	0.091
Proportion Foliar Insect Damage							0.022	0.004
Carabid Beetles (m−2)	1.7	0.3	0.3	0.1	1.6	0.5	0.1	0.1
Centipedes (m−2)	4.9	0.9	7.8	2.4	8.8	1.9	2.1	0.4
Spiders (m−2)	26.9	3.3	52.5	12.3	62.7	11.0	173.5	16.3

Data are from American beech stands in a New Hampshire forest where half the plots had reduced red-backed salamander abundance and from enclosures in similar stands with densities of salamanders from 0–4/m².