Table 6. Descriptions of rice paddies where the observation (a) and removal (b) experiments were conducted.
| (a) Observation experiment | ||||||||
|---|---|---|---|---|---|---|---|---|
| Complex | |
Surface (km2) | # of paddies | # of paddies with |
||||
| Coordinates (N & E in°) | Hj only | Hs only | both species | no Hyla | ||||
| 1 | 37.898 | 126.758 | 1.41 | 69 | 24 | 0 | 8 | 37 |
| 2 | 37.890 | 126.750 | 0.21 | 190 | 59 | 0 | 10 | 121 |
| 3 | 37.887 | 126.749 | 0.05 | 11 | — | — | — | — |
| 4 | 37.887 | 126.741 | 0.29 | 67 | 26 | 2 | 19 | 20 |
| 5 | 37.852 | 126.773 | 1.17 | 284 | 89 | 3 | 52 | 140 |
| 6 | 37.748 | 126.756 | 1.03 | 134 | — | — | — | — |
| (b) Removal experiment | ||||||||
| Sites | Coordinates (N & E in°) | #Hj removed | # focal species | Paddy width (m) | # Hs removed | # focal species | Paddy width (m) | |
| 1 | 37.754 | 126.758 | 2 | 2 | 21.45 | 3 | 2 | 34.00 |
| 2 | 37.795 | 126.802 | 12 | 2 | 28.90 | 1 | 9 | 34.05 |
| 3 | 37.809 | 126.790 | 84 | 3 | 27.77 | 1 | 4 | 35.38 |
| 4 | 37.817 | 126.706 | 3 | 3 | 27.30 | 1 | 5 | 37.42 |
| 5 | 37.897 | 126.755 | 7 | 1 | 57.43 | 2 | 11 | 44.84 |
| 6 | 37.890 | 126.751 | 2 | 1 | 8.36 | 1 | 4 | 18.58 |
| 7 | 37.885 | 126.743 | 9 | 2 | 9.90 | 1 | 2 | 77.14 |
| 8 | 37.765 | 126.693 | 3 | 1 | 53.11 | 2 | 4 | 42.47 |
| 9 | 36.884 | 126.901 | 33 | 4 | 40.90 | 2 | 1 | 45.70 |
| 10 | 36.818 | 126.881 | 18 | 2 | 29.29 | 3 | 2 | 44.76 |
| 11 | 36.962 | 127.109 | 4 | 2 | 19.02 | 2 | 4 | 54.07 |
| 12 | 36.967 | 127.089 | 74 | 3 | 30.20 | 1 | 2 | 57.83 |
| 13 | 36.901 | 127.118 | 17 | 5 | 32.67 | 3 | 9 | 27.32 |
| 14 | 36.990 | 127.772 | 4 | 2 | 50.93 | 1 | 5 | 54.28 |
| 15 | 36.978 | 127.777 | 2 | 1 | 26.70 | 1 | 2 | 31.96 |
| 16 | 36.979 | 127.791 | 4 | 1 | 107.97 | 1 | 1 | 39.93 |
| 17 | 36.786 | 127.048 | 11 | 2 | 52.41 | 4 | 8 | 97.79 |
| 18 | 36.784 | 127.027 | 7 | 2 | 72.93 | 1 | 3 | 18.53 |
| 19 | 36.806 | 126.991 | 7 | 4 | 111.61 | 1 | 1 | 28.83 |
| 20 | 36.816 | 126.959 | 1 | 2 | 36.65 | 2 | 4 | 40.53 |
Hj stands for Hyla japonica, and Hs stands for H. suweonensis. In the observation experiment, which was conducted in 2013, six rice-paddy complexes were used. All six were located in the city of Paju, province of Gyeonggi, Republic of Korea. Calling locations were sampled in 16 rice paddies from 6 complexes. Complexes 1, 2, 4, and 5 were sampled for calling location within rice-paddy complexes. “# Of paddies” denotes the number of rice paddies per complex with the presence of each or no Hylid species. The removal experiment, which was conducted in 2015, included 20 rice-paddy complexes. Two rice paddies at each site were randomly selected, one with H. japonica as the focal species and one with H. suweonensis as the focal species. Individuals of the non-focal species were temporarily removed from the rice paddy.