Table 3. Regressions between log(Chla) and log(TN) for Different Coastal Areas and Trajectory Analyses for Temporal Departures from Linear Relationship^a.

				linear regression log(Chla)–log(TN)			trajectory analysis
region	area	short name	no. of years	relationship	RMSE	p	RMSE	χ2	p
Chesapeake Bay	Choptank	CHO	23	–1.44 + 0.87x	0.24	0.0034	0.17	19.31	<0.0001
Chesapeake Bay	James River	JMS	23	1.37 + 0.12x	0.22	0.6646	0.18	7.61	0.0236
Chesapeake Bay	Mainstem mesohaline	MH	18	–0.93 + 0.79x	0.14	0.0303	0.13	6.46	0.0412
Chesapeake Bay	Mainstem polyhaline	PH	18	–2.36 + 1.22x	0.22	0.0409	0.19	8.87	0.0124
Chesapeake Bay	Patuxent	PAX	21	0.30 + 0.54x	0.25	0.2233	0.21	7.50	0.0237
Chesapeake Bay	Potomac	POT	23	0.16 + 0.50x	0.19	0.0484	0.17	8.21	0.0175
Chesapeake Bay	Rappahannock	RPP	23	1.19 + 0.23x	0.26	0.5519	0.17	15.54	0.0005
Denmark coast	Flensborg Fjord	FLF	21	0.46 + 0.22x	0.17	0.2019	0.14	11.98	0.0025
Denmark coast	Horsens Fjord	HOF	26	1.85 + –0.17x	0.24	0.4580	0.31	3.24	0.1920
Denmark coast	Køge Bay	KØB	21	–3.71 + 1.30x	0.15	0.0002	0.13	7.88	0.0197
Denmark coast	Limfjorden	LIM	25	–0.84 + 0.61x	0.28	0.0374	0.24	9.93	0.0067
Denmark coast	Nissum Bredning	NIB	25	0.62 + 0.20x	0.24	0.2645	0.26	5.00	0.0802
Denmark coast	Odense Fjord	ODF	30	0.85 + 0.12x	0.20	0.4680	0.26	21.57	<0.0001
Denmark coast	Roskilde Fjord	ROF	29	–0.11 + 0.37x	0.17	0.0679	0.23	1.01	0.5893
Denmark coast	Skive Fjord	SKF	25	–2.67 + 1.09x	0.20	<0.0001	0.20	17.21	0.0002
Denmark coast	Sydfynske Øhav	SFØ	29	0.78 + –0.03x	0.21	0.9148	0.16	22.36	<0.0001
Denmark coast	Århus Bay	ÅRB	25	1.61 + –0.28x	0.23	0.5766	0.22	5.76	0.0554
Tampa Bay	Hillsborough Bay	HB	26	–0.50 + 0.73x	0.25	0.0046	0.19	21.81	<0.0001
Tampa Bay	Lower Tampa Bay	LTB	26	0.43 + 0.24x	0.23	0.1956	0.20	11.30	0.0038
Tampa Bay	Middle Tampa Bay	MTB	26	–0.25 + 0.56x	0.28	0.0387	0.19	35.61	<0.0001
Tampa Bay	Old Tampa Bay	OTB	26	1.74 + 0.08x	0.20	0.6882	0.15	23.56	<0.0001
Wadden Sea	Dantziggat	DG	26	0.10 + 0.56x	0.27	0.0880	0.24	13.43	0.0012
Wadden Sea	Doove Balg	DB	25	1.19 + 0.25x	0.29	0.4630	0.30	3.16	0.2063
Wadden Sea	Huibertgat	HG	29	–1.05 + 0.64x	0.18	<0.0000	0.19	1.93	0.3872
Wadden Sea	Lauwers	LW	29	0.03 + 0.52x	0.23	0.0875	0.24	0.71	0.7062
Wadden Sea	Marsdiep	MD	30	0.52 + 0.31x	0.18	0.0583	0.17	2.90	0.2276
Wadden Sea	Vliestroom	VS	29	0.78 + 0.29x	0.20	0.1102	0.19	3.84	0.1499
Wadden Sea	Zoutkamperlaag	ZK	29	–0.44 + 0.64x	0.26	0.0486	0.22	5.98	0.0515

^aLinear relationship, residual mean square error (RMSE, weighted) and significance level (p) refer to the linear regression of log(Chla) vs. log(TN). Temporal departures from the linear relationship were investigated by means of GAM; RMSE was calculated as the deviance per observation (unweighted), χ² and p derive from likelihood ratio test statistics. Number of observations is equal to the number of years. Significant relationships (p < 0.05) are highlighted in bold.