Responses of nitrogen stable isotopes in fish to phosphorus limitation in freshwater wetlands | Knowledge and Management of Aquatic Ecosystems

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Table 1

Averages of environmental variables for each study site during the study period. Sites are generally listed from north to south.

Site	pH	DO	TP	SRP	NH₄⁺	NO_x⁻	TN	TN:TP
	SU	mg L⁻¹	μg L⁻¹	μg L⁻¹	mg L⁻¹	mg L⁻¹	mg L⁻¹	Molar ratio
STA-W Cell 3*	7.4	2.8	42	16	0.13	0.051	2.049	108
STA-W Cell 4^*	7.1	1.5	46	12	0.169	0.026	2.071	99
ENR outflow^*	7.4	3.6	24	8	0.047	0.061	2.271	206
L7	7.4	3.6	24	8	0.047	0.061	2.271	206
LOX^*	6.4	3.1	8	1	0.023	0.007	1.208	322
E0	7.1	2.0	74	41	0.186	0.29	2.97	89
F1	7.2	1.7	70	24	0.575	0.061	2.861	91
U3^*	7.5	4.8	5	2	0.269	0.006	2.177	964
L35B	7.2	4.1	13	5	0.017	0.038	1.748	298
2BS	7.3	3.9	21	4	0.049	0.058	1.541	162
L67^*	7.0	2.5	15	5	0.34	0.086	1.648	238
3A15^*	7.1	2.9	6	1	0.036	0.008	1.016	401
3ATH	7.2	3.6	13	4	0.032	0.063	1.377	242
TS-7	7.7	7.0	4	3	0.058	0.02	0.775	446
TS-9	7.7	7.0	4	3	0.058	0.02	0.775	446
North Prong Creek	7.4	4.0	9	3	0.029	0.043	1.327	326

Note: DO: dissolved oxygen. TP: total phosphorus. SRP: soluble reactive phosphorus; TN: total nitrogen. Averages are calculated from weekly to biweekly samples taken between 1990 and 1999.

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