西班牙研究人員通過對(duì)金絲雀的研究發(fā)現(xiàn)，為了對(duì)抗人類活動(dòng)產(chǎn)生的噪音尤其是交通噪音,，城市中的鳥兒會(huì)用更多的時(shí)間來鳴叫。
西班牙研究人員在美國《行為生物學(xué)》雙月刊上發(fā)表報(bào)告說,，他們研究了西班牙托萊多郊區(qū)金絲雀的行為,。金絲雀是當(dāng)?shù)爻Ｒ姷囊环N鳥，研究人員可以準(zhǔn)確記錄它們鳴叫的時(shí)間,。
研究顯示,，當(dāng)噪音水平達(dá)到70分貝時(shí)，金絲雀60％的時(shí)間都在鳴叫,，此外研究人員還發(fā)現(xiàn),。金絲雀的叫聲在市區(qū)比在郊區(qū)更尖利，而且地方越吵,，它們鳴叫的時(shí)間越長,。金絲雀的鳴叫時(shí)間甚至跟日期也有關(guān)系，周末噪音少，鳥兒叫的時(shí)間也少,。
西班牙國家研究委員會(huì)研究人員馬里奧·迪亞斯解釋說,，總體來說，生物對(duì)于人類活動(dòng)造成的全球性變化的反應(yīng)是相當(dāng)消極的,，“它們通常不能適應(yīng)”,，但金絲雀的行為說明，動(dòng)物對(duì)這些變化的反應(yīng)并非一成不變,。（生物谷Bioon.com）
生物谷推薦原文出處：
Behavioral Ecology (2011) 22 (2): 332-336. doi: 10.1093/beheco/arq210
Serins respond to anthropogenic noise by increasing vocal activity
Mario Díaza, Antonio Parrab and Clemente Gallardob
Increasing levels of anthropogenic noise interferes with the acoustic communication of birds. Adaptive shifts in song characteristics (frequency and amplitude) and in the spatial and temporal patterns of singing behavior in the face of noise pollution have been documented. We provide evidence for another response, increased time spent singing, in a successful suburban bird, the serin Serinus serinus. Serins increased the proportion of time spent singing at posts in relation to changes in noise levels both in space and in time up to a threshold at approximately 70 dBA, whereas time spent at singing posts was not related to noise levels. This response could be related to the characteristics of the serin's song (high pitch and presumably low metabolic and neuromuscular costs) that would reduce the relative effectiveness of song shifts. However, vocal activity decreased sharply above the 70 dBA threshold, suggesting that this strategy is costly. Because singing time may trade off with vigilance time, our data suggest that bird populations in noisy city environments may face an increased challenge for survival compared with quiet areas, even for species whose song characteristics reduce the interference of urban noise with acoustic communication.
