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原文連結
論文資訊
- 類型：已發表論文
- 日期：2022-08-01
摘要
城市ization can affect 物種 communication by introducing new selection pressures, such as noise pollution and different environmental 傳播 properties. These selection pressures can trigger divergence between 城市 and non- 城市 族群s. Songbirds rely on vocalizations to defend territories and attract mates. 城市 songbirds have been shown in some 物種 and some 族群s to increase the frequencies, reduce the length and change other temporal features of their songs. This study compares songs from four 城市 and three non-城市 族群s of dark-eyed juncos (Junco hyemalis) throughout Southern California. We examined song length, trill rate, minimum frequency, maximum frequency, peak frequency and frequency bandwidth. We also compared songs recorded from one 城市 junco 族群 in San Diego nearly two decades ago with recently collect
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