Ecological Archives E087-074-A3

**Deanne C. Drake, Robert J. Naiman, and J. Scott Bechtold. 2006. Fate of nitrogen in riparian forest soils and trees: an ¹⁵N tracer study simulating salmon decay. Ecology 87:1256–1266.**

Appendix C. Tables listing ¹⁵N atom% and N content of soil pools and western red cedar roots and foliage over the one-year experiment. Repeated-measures ANOVA P < 0.05 indicate a significant change over the course of the experiment. som = soil organic matter; n = 4 plots for each value; NA = values not available.


Table C1. ¹⁵N atom% for soil pool.		Atom% (mean ± SE) ¹⁵N

Date	No. days from first ¹⁵N application	O-horizon extractable	SE	O-horizon microbial	SE	O-horizon total (ext + mic + som)	SE	A-horizon extractable	SE	A-horizon microbial	SE	A-horizon total (ext + mic + som)	SE

10/15/03	-7	0.3671	0.003	0.3668	0.001	0.3662	0	0.3724	0.002	0.3640	0.001	0.3678	0
10/23/03	0	5.8011	0.546	0.7255	0.146	NA	NA	1.6659	0.451	0.4475	0.144	NA	NA
10/25/03	2	6.0111	0.560	NA	NA	NA	NA	1.0534	0.153	NA	NA	NA	NA
10/30/03	7	9.2727	0.098	7.5835	0.191	NA	NA	4.0724	0.877	2.1628	0.740	NA	NA
11/6/03	14	7.7865	0.288	7.8524	0.226	NA	NA	5.1069	0.529	2.1134	0.490	NA	NA
11/13/03	21	7.1581	0.390	5.3900	0.605	1.1559	0.085	4.2369	1.292	1.6517	0.538	0.4258	0.031
12/3/03	41	6.2340	0.639	1.4000	0.280	0.9198	0.108	3.9083	0.740	3.8509	1.031	0.4968	0.059
3/15/04	144	1.4414	0.256	1.8362	0.251	0.8139	0.013	0.9131	0.173	0.9383	0.190	0.4034	0.007
4/22/04	182	1.8000	0.174	2.2670	0.226	0.8065	0.015	0.6627	0.081	0.5977	0.068	0.4069	0.008
5/23/04	213	1.5935	0.053	2.2446	0.178	0.7827	0.014	0.7020	0.036	0.6310	0.103	0.4039	0.007
8/13/2004	295	1.3162	0.174	1.9304	0.270	0.7463	0.009	0.6441	0.036	0.6222	0.012	0.4174	0.005
10/25/2004	368	1.3375	0.123	1.9306	0.228	0.8098	0.036	0.5592	0.064	0.6243	0.128	0.4094	0.018

Statistical results
Repeated-measures		P < 0.0001		P < 0.0001		P = 0.003		P < 0.0001		P = 0.0001		P = 0.031
ANOVA		F = 86.917		F = 85.207		F = 4.586		F = 11.346		F = 5.393		F = 2.811


Table C2. ¹⁵N atom% for tree pool.		Atom% (mean ± SE) ¹⁵N

Date	No. days from first ¹⁵N application	Cedar roots (<3 mm)	SE	Cedar foliage	SE

9/23/03	-30	0.3658	0.003	0.3663	0.000
10/15/03	-7	0.3630	0.001	0.3661	0.000
10/23/03	0	0.3663	0.023	NA	NA
10/25/03	2	0.4403	0.259	0.3664	0.000
10/30/03	7	0.7679	0.178	0.3696	0.001
11/6/03	14	0.7861	0.114	0.3687	0.001
11/13/03	21	1.0826	0.317	NA	NA
12/3/03	41	1.2130	0.303	0.3719	0.002
3/15/04	144	1.5275	0.194	0.3921	0.013
4/22/04	182	1.4790	0.305	0.6746	0.117
5/23/04	213	1.7217	0.208	0.6612	0.154
8/13/04	295	1.1600	0.243	0.6098	0.102
10/25/04	368	1.2835	0.113	0.6701	0.141

		P = 0.0001		P = 0.002
		F = 4.85		F = 3.88


Table C3. N content for soil pool.		g N/kg dry soil (mean ± SE)

Date	Days from first ¹⁵N application	O-horizon extractable	SE	O-horizon microbial	SE	O-horizon total (ext + mic + som)	SE	A-horizon extractable	SE	A-horizon microbial	SE	A-horizon total (ext + mic + som)	SE

10/15/03	-7	0.032	0.003	0.180	0.011	0.871	0.053	0.014	0.003	0.031	0.005	0.322	0.012
10/23/03	0	0.288	0.031	0.562	0.040	NA	NA	0.037	0.006	0.093	0.014	NA	NA
10/25/03	2	0.189	0.013	NA	NA	NA	NA	0.007	0.001	NA	NA	NA	NA
10/30/03	7	0.411	0.012	0.988	0.096	NA	NA	0.022	0.004	0.052	0.004	NA	NA
11/6/03	14	0.866	0.072	1.049	0.116	NA	NA	0.018	0.002	0.052	0.004	NA	NA
11/13/03	21	0.687	0.105	0.960	0.260	1.044	0.124	0.027	0.005	0.056	0.014	0.385	0.017
12/3/03	41	0.199	0.025	0.426	0.081	1.207	0.097	0.019	0.003	0.046	0.008	0.451	0.017
3/15/04	144	0.026	0.002	0.244	0.026	0.928	0.086	0.005	0.000	0.036	0.006	0.485	0.034
4/22/04	182	0.053	0.002	0.382	0.054	1.012	0.081	0.010	0.001	0.056	0.003	0.459	0.064
5/23/04	213	0.035	0.001	0.286	0.048	1.110	0.146	0.006	0.001	0.040	0.010	0.464	0.093
8/13/2004	295	0.048	0.004	0.276	0.008	1.373	0.099	0.008	0.002	0.039	0.005	0.429	0.077
10/25/2004	368	0.026	0.001	0.248	0.046	1.206	0.131	0.007	0.000	0.052	0.004	0.436	0.033

Statistical results
Repeated-measures		P < 0.0001		P < 0.0001		P = 0.0363		P = 0.001		P < 0.001		P = 0.224
ANOVA		F = 14.045		F = 10.545		F = 2.708		F = 3.816		F = 4.305		F = 1.490


Table C4. N content for tree pool.		% N

Date	No. days from first ¹⁵N application	Cedar roots (<3 mm)	SE	Cedar foliage	SE

9/23/03	-30	0.012	0.002	0.013	0.000
10/15/03	-7	0.012	0.004	0.013	0.000
10/23/03	0	0.011	0.003	NA	NA
10/25/03	2	0.011	0.005	0.013	0.000
10/30/03	7	0.010	0.003	0.013	0.001
11/6/03	14	0.010	0.002	0.013	0.001
11/13/03	21	0.010	0.001	NA	NA
12/3/03	41	0.011	0.003	0.013	0.002
3/15/04	144	0.011	0.002	0.012	0.013
4/22/04	182	0.012	0.002	0.019	0.117
5/23/04	213	0.010	0.003	0.017	0.154
8/13/04	295	0.012	0.001	0.014	0.102
10/25/04	368	0.009	0.001	0.012	0.141

		P = 0.812		P < 0.0001
		F = 0.603		F = 5.782

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Ecological Archives E087-074-A3

Deanne C. Drake, Robert J. Naiman, and J. Scott Bechtold. 2006. Fate of nitrogen in riparian forest soils and trees: an 15N tracer study simulating salmon decay. Ecology 87:1256–1266.

**Deanne C. Drake, Robert J. Naiman, and J. Scott Bechtold. 2006. Fate of nitrogen in riparian forest soils and trees: an ¹⁵N tracer study simulating salmon decay. Ecology 87:1256–1266.**