Spring arrival of birds depends on the North Atlantic Oscillation
Spring arrival of birds depends on the North Atlantic Oscillation
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鸟类的春天到来取决于北大西洋涛动
DOI：
10.1111/j.0908-8857.2004.03199.x
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发表时间：
2004
影响因子：
1.7
通讯作者：
E. Lehikoinen
中科院分区：
文献类型：
--
作者：
A. Vähätalo;Kalle Rainio;A. Lehikoinen;E. Lehikoinen
在芬兰的两个鸟类观测站（1970/99年），研究了81个迁徙物种响应北大西洋涛动（NAO）的到达时间。时间确定的第一个移民和迁移的高峰期，以及早期，中期和晚期阶段的迁移，定义为鸟类的季节性累积总和分别达到5%，50%和95%的日期。对于大多数物种，到达的时间与NAO在所有阶段的迁移呈负相关：相关性是显着的79%的物种研究。因此，大多数物种到达芬兰早时，NAO是积极的，并指示在北方欧洲温和多雨的冬天。虽然所有阶段的迁移与NAO负相关，相关性更负的早期比晚期阶段的迁移。由于NAO在研究期间没有显示出显着的趋势，相关性表明，鸟类的时间遵循NAO的随机波动。这一发现表明，大多数芬兰候鸟能够及时调整春季到来的时间，以应对气候变化。
The timing of arrival of 81 migratory species in response to the North Atlantic Oscillation (NAO) was studied at two Finnish bird observatories (1970/99). Timing was determined for the first migrants and for the peak of migration, as well as for the early, median and late phases of migration, defined as the dates when the seasonal cumulative sum of birds reached 5%, 50% and 95%, respectively. For most species, the timing of arrival correlated negatively with the NAO in all phases of migration: the correlation was significant for 79% of species studied. Thus, most species arrived in Finland early when the NAO was positive and indicative of mild and rainy winters in northern Europe. Although all phases of migration correlated negatively with the NAO, the correlations were more negative for the early than for the late phases of migration. Since the NAO did not show a significant trend during the study period, the correlations indicate that the timing of birds followed stochastic fluctuations in the NAO. This finding suggests that most Finnish migratory birds are able to adjust the timing of spring arrival in response to climatic change without time delay.