鸟类迁徙对图们江下游湿地声景时间格局的影响

王士政, 孙翊斐, 李珍珍, 舒越, 冯佳伟, 王天明

Effects of bird migration on the temporal patterns of the wetland soundscape in the downstream region of the Tumen River Basin of China

Shizheng Wang, Yifei Sun, Zhenzhen Li, Yue Shu, Jiawei Feng, Tianming Wang

图4 五个时段的功率谱密度(PSD)归一化值。PSDi表示频段i的功率谱密度, 即i到(i + 1) kHz频段的功率谱密度。

Fig. 4 Power spectral density (PSD) levels across different periods. PSDi denotes the power spectral density of band i, i.e., the power spectral density of band i to (i + 1) kHz.