百灵鸟到达和离开越冬地和集结地的长期迁徙变化

IF 2.6 2区 环境科学与生态学 Q2 BIODIVERSITY CONSERVATION Endangered Species Research Pub Date : 2024-03-28 DOI:10.3354/esr01315
Matthew J. Butler, Mark T. Bidwell
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引用次数: 0

摘要

摘要:气候变化会导致鸟类行为的改变,尤其是迁徙物种。我们评估了濒危百灵鹤的迁徙物候学随温度、降水和其它迁徙行为决定因素的长期变化。我们模拟了得克萨斯州越冬地数量高峰的时间与日期和年份的函数关系。在萨斯喀彻温省中部的春季和秋季迁徙过程中,我们模拟了最早和最晚观测到的时间以及它们之间的出现时间,并将其作为年份、天气和小麦产量的函数。在1950-2010年冬季,高峰丰度期(≥种群的90%)缩短。在 1950-1951 年冬季,高峰期为 11 月 28 日至 3 月 12 日,但到了 2010-2011 年冬季,高峰期为 12 月 18 日至 2 月 20 日。我们预测,到 2035-2036 年冬季,高峰期将缩短至 1 月 2 日至 2 月 6 日。1971 年,丹顶鹤在 9 月 16 日到达,10 月 17 日离开,但到 2021 年,它们提前 12 天(9 月 4 日)到达,推迟 17 天(11 月 3 日)离开。我们预测,到 2035 年秋季,白鹤迁徙时间将延长至 63.8 d(9 月 1 日到达,11 月 8 日离开)。1979-2021年春季迁徙期间,迁徙物候期没有变化趋势(平均出现期为32 d)。迁徙物候的变化可能需要修改保护方法和考虑新的保护机会。例如,这些变化可能会减少鹤在越冬地度过的时间,从而需要对停歇地进行更多投资。
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Long-term migratory alterations to whooping crane arrival and departure on the wintering and staging grounds
ABSTRACT: Climate change can result in alterations to avian behavior, particularly in migratory species. We assessed long-term changes in the endangered whooping crane Grus americana migration phenology in response to temperature, precipitation, and other determinants of migratory behavior. We modeled timing of abundance peaks on the Texas wintering grounds as a function of date and year. During spring and fall migration in central Saskatchewan, we modeled timing of earliest and latest observations, and period of occurrence between them, as a function of year, weather, and wheat production. During winters 1950-2010, the peak abundance period (≥90% of population) shortened. In winter 1950-1951, the peak was 28 November-12 March, but by winter 2010-2011, it was 18 December-20 February. We predict it will shrink to 2 January-6 February by winter 2035-2036. During fall migration 1972-2021, the period cranes occurred in central Saskatchewan lengthened by 20.3 d. In 1971, cranes arrived by 16 September and departed by 17 October, but by 2021 they arrived 12 d earlier (4 September) and departed 17 d later (3 November). We predict a lengthened period of occurrence of 63.8 d by fall 2035 (arrival by 1 September, departure by 8 November). During spring migration 1979-2021, there were no trends in migration phenology (mean period of occurrence was 32 d). Alterations in migration phenology may require modified conservation approaches and consideration of new conservation opportunities. For example, these changes may reduce time cranes spend on the wintering grounds, requiring greater investment in stopover areas.
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来源期刊
Endangered Species Research
Endangered Species Research BIODIVERSITY CONSERVATION-
CiteScore
5.50
自引率
6.50%
发文量
38
审稿时长
31 weeks
期刊介绍: ESR is international and interdisciplinary. It covers all endangered forms of life on Earth, the threats faced by species and their habitats and the necessary steps that must be undertaken to ensure their conservation. ESR publishes high quality contributions reporting research on all species (and habitats) of conservation concern, whether they be classified as Near Threatened or Threatened (Endangered or Vulnerable) by the International Union for the Conservation of Nature and Natural Resources (IUCN) or highlighted as part of national or regional conservation strategies. Submissions on all aspects of conservation science are welcome.
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