Journal of Ecosystems

Research Article

Comparison of Two PARAFAC Models of Dissolved Organic Matter Fluorescence for a Mid-Atlantic Forested Watershed in the USA

Table 2

Correlations between DOM composition (%humic-like or %protein-like, derived from FH and CM model; see text for details) with measured DOM concentrations (DOC and DON) and DOM metrics (derived from UV and fluorescence measurements) across watershed sources.


Watershed sources	DOM composition	DOC	DON	a₂₅₄	HIX	FI

TF	%Humic-like (FH)	0.05	0.34	0.30	0.94	−0.23
	%Humic-like (CM)	0.13	0.49	0.31	0.41	0.46
	%Protein-like (FH)	0.01	−0.27	−0.22	−0.99	0.30
	%Protein-like (CM)	−0.05	−0.27	−0.19	−0.90	0.33

LT	%Humic-like (FH)	−0.05	−0.04	0.09	0.88	−0.52
	%Humic-like (CM)	−0.18	−0.15	−0.23	0.12	−0.20
	%Protein-like (FH)	0.05	−0.15	−0.27	−0.99	0.08
	%Protein-like (CM)	0.04	0.05	−0.07	−0.92	0.40

U	%Humic-like (FH)	0.66	0.42	0.72	0.97	−0.24
	%Humic-like (CM)	−0.12	−0.15	−0.04	0.06	0.40
	%Protein-like (FH)	−0.64	−0.45	−0.68	−0.99	0.22
	%Protein-like (CM)	0.23	0.43	0.12	−0.32	−0.23

WSW	%Humic-like (FH)	0.72	0.38	0.78	0.98	−0.29
	%Humic-like (CM)	0.31	−0.03	0.39	0.39	0.16
	%Protein-like (FH)	−0.73	−0.45	−0.78	−0.99	0.18
	%Protein-like (CM)	−0.55	−0.28	−0.61	−0.93	0.26

ST	%Humic-like (FH)	0.64	0.46	0.65	0.98	−0.23
	%Humic-like (CM)	0.11	0.09	0.23	0.32	−0.15
	%Protein-like (FH)	−0.63	−0.43	−0.60	−0.99	0.11
	%Protein-like (CM)	−0.53	−0.22	−0.52	−0.79	0.15

HY	%Humic-like (FH)	0.42	0.48	0.47	0.96	−0.60
	%Humic-like (CM)	0.05	0.02	0.05	0.41	−0.36
	%Protein-like (FH)	−0.47	−0.45	−0.52	−0.99	0.42
	%Protein-like (CM)	−0.25	−0.18	−0.35	−0.73	0.42

SGW	%Humic-like (FH)	0.94	0.71	0.85	0.99	−0.87
	%Humic-like (CM)	0.89	0.66	0.82	0.90	−0.76
	%Protein-like (FH)	−0.90	−0.67	−0.79	−0.99	0.80
	%Protein-like (CM)	−0.84	−0.61	−0.72	−0.92	0.77

RGW	%Humic-like (FH)	0.46	0.46	0.83	0.99	−0.52
	%Humic-like (CM)	0.20	0.28	0.72	0.88	−0.56
	%Protein-like (FH)	−0.48	−0.44	−0.82	−0.99	0.53
	%Protein-like (CM)	−0.22	−0.04	−0.64	−0.79	0.85

P	%Humic-like (FH)	0.47	0.11	0.30	0.99	0.20
	%Humic-like (CM)	0.27	−0.01	−0.02	0.77	0.30
	%Protein-like (FH)	−0.48	−0.11	−0.30	−0.99	−0.24
	%Protein-like (CM)	−0.25	−0.09	0.08	−0.79	−0.38

DGW	%Humic-like (FH)	0.41	0.17	−0.11	0.99	−0.21
	%Humic-like (CM)	0.47	−0.08	−0.18	0.69	−0.34
	%Protein-like (FH)	−0.31	−0.17	0.12	−0.99	0.09
	%Protein-like (CM)	0.14	0.41	0.17	−0.58	0.42

All correlations significant at .