Utilization of nitrate stable isotopes of Chydorus sphaericus (OF Müller) to elucidate the hydrological characteristics of riverine wetlands in the Nakdong River, South Korea

Table 1 Local-scale hydrological characteristics in each studied wetland in the Nakdong River basin

Num.	Type	Water source	Riparian connectivity	Soil type	Topography	Edge index	Area (m²)	NO₃⁻-N (spring)	NO₃⁻-N (autumn)	Chydorus sphaericus (spring)	Chydorus sphaericus (autumn)
1	Channel	Surface water	Good	Regosol	Flood plain	0.035	44,083	4.8	5.2	4.7	6.6
2	Detention pond	Sewage	Poor	Regosol	Water channel	0.018	8347	10.6	8.3	6.7	8.4
3	Riparian	Surface water	Good	Regosol	Flood plain	0.025	87,000	3.2	4.5	4.2	5.9
4	Detention pond	Rainfall/groundwater	Poor	Regosol	Flood plain	0.041	22,590	7.0	8.5	6.1	7.7
5	Channel	Surface water	Good	Regosol	Flood plain	0.036	10,400	5.4	6.4	6.1	7.1
6	Detention pond	Rainfall/groundwater	Poor	Regosol	Flood plain	0.029	4630	7.6	8.6	7.4	7.8
7	Riparian	Surface water	Good	Regosol	Flood plain	0.015	15,000	3.3	4.7	3.9	5.6
8	Riparian	Surface water	Good	Regosol	Flood plain	0.018	24,168	4.1	5.0	4.3	6.2
9	Channel	Sewage	Moderate	Regosol	Flood plain	0.027	38,628	11.8	12.5	7.6	8.3
10	Riparian	Surface water	Good	Regosol	Flood plain	0.019	75,000	3.8	4.3	3.8	6.0
11	Channel	Surface water	Good	Regosol	Flood plain	0.035	390,000	5.2	5.9	5.1	6.7
12	Detention pond	Sewage	Moderate	Regosol	Island	0.011	60,456	9.5	7.8	7.3	8.0
13	Channel	Surface water	Good	Regosol	Flood plain	0.029	426,551	5.8	6.2	6.8	7.2
14	Channel	Surface water	Good	Regosol	Flood plain	0.064	17,500	6.4	7.3	6.7	6.8
15	Channel	Surface water	Moderate	Regosol	Flood plain	0.021	122,000	5.2	5.9	5.1	6.7
16	Detention pond	Rainfall/groundwater	Poor	Regosol	Flood plain	0.068	33,700	9.8	8.5	7.6	7.6
17	Channel	Surface water	Good	Regosol	Flood plain	0.018	147,400	6.8	7.9	6.8	7.6
18	Channel	Sewage	Moderate	Regosol	Flood plain	0.021	68,579	11.5	11.6	7.8	8.6
19	Riparian	Surface water	Good	Regosol	Flood plain	0.031	34,024	4.1	5	4.3	6.2

ISSN: 2288-1220