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首页> 外文期刊>Wader study: the international journal of shorebird science >Contrasting spring arrival dates of two shorebirds in N Norway
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Contrasting spring arrival dates of two shorebirds in N Norway

机译：对比春天到来的日期两个水鸟在N挪威

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摘要

In the Northern Hemisphere, rising temperatures have led to advances in the onset of spring that, in turn, have been regarded as a major determinant of arrival times of migratory birds. The return of spring migrants to N Norway has been studied since 1980 using data collected by local ornithologists and the general public. This study focuses on two species that are true migrants but with contrasting timing and destination: European Oystercatchers Hoematopus ostrolegus that arrive in March to breed locally and Red Knots Calidris conutus that arrive two months later to refuel for 2-3 weeks on their way to their breeding grounds in Greenland and NE Canada. Oystercatchers advanced their arrival dates by two weeks between 1980 and 2016. Apparent arrival dates of Red Knots showed a parabolic trend with year, becoming later during 1984- 1996 and earlier between 1996 and 2016. This might not reflect changes in phenology; rather it might result from a decrease and then increase in the number of Knots stopping over in Balsfjord. Although much less than other early migrants, Oystercatchers vary their date of arrival by 3-4 weeks, partly in response to air temperatures in March in the breeding area. The knots arrive within a 10-day window in May and are thus much more consistent in their arrival dates. This consistency, which is independent of a slight increase in May temperatures, may be related to factors outside Norway.
机译：在北半球,气温上升春天的爆发导致的进步,反过来,一直被视为一个主要行列式候鸟的到达时间。春天的返回挪威移民到N从1980年开始研究使用收集的数据当地的鸟类学家和公众。研究重点是两个物种,是真的移民,但时机和对比目的地:欧洲蛎鹬Hoematopus在本地ostrolegus,到三月份繁殖和红结Calidris conutus到达两个个月后为2 - 3周的路上加油在格陵兰岛和NE它们的繁殖地加拿大。约会了两周在1980年和2016年之间。明显的红腹滨鹬到达的日期显示抛物线趋势,成为后来的期间1984 - 1996年,早在1996年和2016年之间。这可能不反映生物气候学的变化;而是减少可能造成的结停止的数量在增加Balsfjord。移民,蛎鹬改变他们的日期到来的3 - 4周,部分原因是为了应对空气3月气温在繁殖区域。节在5月和10天内到达窗口因此更一致的在他们的到来吗日期。5月气温略有上升,可能是挪威以外的相关因素。

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