Table 1.

(A) Eigenvalues and (B) loadings from a principal component analysis (PCA) that included stream characteristics and the proportion of local and watershed-level agriculture for each sampling site.

(A) eigenvalues
metric	PC1	PC2	PC3	PC4	PC5	PC6	PC7	PC8
s.d.	2.06	1.10	0.92	0.78	0.66	0.60	0.47	0.28
proportion of variance	0.53	0.15	0.11	0.08	0.05	0.05	0.03	0.01
cumulative proportion	0.53	0.68	0.79	0.86	0.92	0.96	0.99	1.00
(B) loadings
variable	PC1	PC2	PC3	PC4	PC5	PC6	PC7	PC8
proportion watershed agriculture	−0.43	0.11	−0.18	0.37	−0.02	−0.45	−0.02	−0.66
buffer width	0.39	−0.44	−0.01	−0.22	−0.18	0.08	0.56	−0.51
proportion local agriculture	−0.29	0.55	0.45	0.04	−0.06	0.28	0.56	−0.03
log turbidity	−0.40	−0.18	0.15	−0.34	−0.13	0.57	−0.44	−0.36
log July nitrogen	−0.36	0.004	−0.04	−0.75	−0.11	−0.50	0.15	0.17
log July phosphorus	−0.36	−0.32	−0.24	0.03	0.76	0.19	0.30	0.09
log sinuosity	0.36	0.24	0.42	−0.27	0.60	−0.20	−0.23	−0.33
log water temperature	−0.19	−0.55	0.71	0.27	−0.05	−0.26	−0.02	0.16