Drivers of demographic decline across the annual cycle of a threatened migratory bird.
Drivers of demographic decline across the annual cycle of a threatened migratory bird.
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DOI：
10.1038/s41598-018-25633-z
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发表时间：
2018-05-09
影响因子：
4.6
通讯作者：
Foster KR
中科院分区：
文献类型：
--
作者：
Wilson S;Saracco JF;Krikun R;Flockhart DTT;Godwin CM;Foster KR
迁徙物种正在迅速减少，但我们很少知道对大多数物种来说，年度周期的哪些周期是有限的。要有效地将养护资源分配给年度周期中最能促进物种恢复的时期，就需要这种知识。我们利用鸟类繁殖地生产力和生存监测计划(MAP)的范围内数据(1993-2016)，研究了受威胁的新热带迁徙的加拿大林莺(Cardellina Candensis)的人口趋势和对人类足迹的反应。数量下降幅度最大的是东部繁殖区，其次是西部地区。任何地区的养殖生产率都没有下降。相比之下，我们观察到所有地区的招募人数都在下降，东部和西部的明显存活率较低，东部的明显存活率也在下降。随着地图站周围干扰的增加，物种丰度下降。1993至2009年间，人类在繁殖范围内的足迹指数增加了0.11%，而越冬范围内的人类足迹指数增加了14%。繁殖地的景观尺度干扰可能会影响某些区域的种群数量；然而，观察到的人口学和足迹趋势表明，非繁殖期的限制可能是总体数量下降的驱动因素，特别是对东部种群而言。
Migratory species are rapidly declining but we rarely know which periods of the annual cycle are limiting for most species. This knowledge is needed to effectively allocate conservation resources to the periods of the annual cycle that best promote species recovery. We examined demographic trends and response to human footprint for Canada warblers (Cardellina canadensis), a threatened Neotropical migrant, using range-wide data (1993–2016) from the Monitoring Avian Productivity and Survivorship (MAPS) program on the breeding grounds. Declines in abundance were steepest in the eastern breeding region, followed by the western region. Breeding productivity did not decline in any region. In contrast, we observed declining recruitment in all regions, low apparent survival in the east and west, and a decline in apparent survival in the east. Abundance declined with increasing disturbance around MAPS stations. Between 1993 and 2009, the human footprint index on the breeding range increased by 0.11% in contrast to a 14% increase on the wintering range. Landscape-scale disturbance on the breeding grounds may influence abundance in some regions; however, the observed trends in demography and footprint suggests limitation during the non-breeding period as the likely driver of overall declines, particularly for eastern populations.
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影响因子：
0.9
作者：
Cardenas-Ortiz, Laura;Bayly, Nicholas J.;Hobson, Keith A.
通讯作者：
Hobson, Keith A.
影响因子：
3.2
作者：
Eraso, Nelly Rodriguez;Armenteras-Pascual, Dolors;Alumbreros, Javier Retana
通讯作者：
Alumbreros, Javier Retana
影响因子：
3.2
作者：
Foster, Kenneth R.;Godwin, Christine M.;Saracco, James F.
通讯作者：
Saracco, James F.
影响因子：
8.8
作者：
Gilroy, James J.;Gill, Jennifer A.;Franco, Aldina M. A.
通讯作者：
Franco, Aldina M. A.
影响因子：
4.6
作者：
Gonzalez-Prieto, Ana M.;Bayly, Nicholas J.;Hobson, Keith A.
通讯作者：
Hobson, Keith A.