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刘晨阳, GélinUriel, 贺如川, 李焕, 权锐昌. 2021: 中国西南地区白腰文鸟在不稳定气候条件下的灵活繁殖策略. 动物学研究, 42(2): 221-226. DOI: 10.24272/j.issn.2095-8137.2020.288
引用本文: 刘晨阳, GélinUriel, 贺如川, 李焕, 权锐昌. 2021: 中国西南地区白腰文鸟在不稳定气候条件下的灵活繁殖策略. 动物学研究, 42(2): 221-226. DOI: 10.24272/j.issn.2095-8137.2020.288
Chen-Yang Liu, Uriel Gélin, Ru-Chuan He, Huan Li, Rui-Chang Quan. 2021: Flexible breeding performance under unstable climatic conditions in a tropical passerine in Southwest China. Zoological Research, 42(2): 221-226. DOI: 10.24272/j.issn.2095-8137.2020.288
Citation: Chen-Yang Liu, Uriel Gélin, Ru-Chuan He, Huan Li, Rui-Chang Quan. 2021: Flexible breeding performance under unstable climatic conditions in a tropical passerine in Southwest China. Zoological Research, 42(2): 221-226. DOI: 10.24272/j.issn.2095-8137.2020.288

中国西南地区白腰文鸟在不稳定气候条件下的灵活繁殖策略

Flexible breeding performance under unstable climatic conditions in a tropical passerine in Southwest China

  • 摘要: 为适应无法预测的气候波动,亲鸟常以调整繁殖时间的方式来降低繁殖成本并优化繁殖产出。与温带地区鸟类相比,气候波动对热带地区鸟类繁殖影响的研究还较缺乏。基于361巢白腰文鸟(Lonchura striata)的野外数据,我们发现白腰文鸟繁殖季开始时间(波动范围在2月15日到6月22日之间)受高温干旱的影响而推迟。频繁降雨会减少窝卵数(4.52±0.75)和降低日存活率,但卵重(0.95±0.10 g)未受显著影响。巢日存活率在降水量较大的2018年(0.95±0.04)显著低于降水量适中的2017年(0.98±0.01)和2019年(0.97±0.00)。白腰文鸟的巢周期是 40.37±2.69天,其中孵化期13.10±1.18天,育雏期23.22±2.40天。2018年的育雏期(25.11±1.97天)要显著长于2017年(22.90±2.22天)和2019年(22.00±2.48天)的育雏期,这可能是受2018年的低温影响。气候也会影响整个繁殖季内总体成功离巢的雏鸟数:降水与气温适中的2017年离巢雏鸟数量(115只)显著大于春季持续高温干旱的2019年(51只)。研究表明,繁殖季期间的干旱和较多的降水都会降低白腰文鸟繁殖成功率,该成果为全球变化背景下的鸟类繁殖生态及其保护研究提供了更深的认识。

     

    Abstract: Parents may adjust their breeding time to optimize reproductive output and reduce reproductive costs associated with unpredictable climatic conditions, especially in the context of global warming. The breeding performance of tropical bird species in response to local climate change is relatively understudied compared with that of temperate bird species. Here, based on data from 361 white-rumped munia (Lonchura striata) nests, we determined that breeding season onset, which varied from 15 February to 22 June, was delayed by drought and high temperatures. Clutch size (4.52±0.75) and daily survival rate but not egg mass (0.95±0.10 g) were negatively affected by frequent rainfall. Daily nest survival during the rainy breeding season in 2018 (0.95±0.04) was lower than that in 2017 (0.98±0.01) and 2019 (0.97±0.00). The overall nesting cycle was 40.37±2.69 days, including an incubation period of 13.10±1.18 days and nestling period of 23.22±2.40 days. The nestling period in 2018 (25.11±1.97 days) was longer than that in 2017 (22.90±2.22 days) and 2019 (22.00±2.48 days), possibly due to the cooler temperatures. Climate also affected the total number of successful fledglings, which was highest under moderate rainfall in 2017 (115 fledglings) and lowest during prolonged drought in 2019 (51 fledglings). Together, our results suggest that drought and frequent rainfall during the breeding season can decrease reproductive success. Thus, this study provides important insights into bird ecology and conservation in the context of global climate change.

     

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