Testing alternative methods for estimation of bird migration phenology from GPS tracking data
Testing alternative methods for estimation of bird migration phenology from GPS tracking data
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测试根据 GPS 跟踪数据估计鸟类迁徙物候的替代方法
DOI:
10.1111/ibi.12809
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发表时间:
2020
期刊:
影响因子:
2.1
通讯作者:
Soriano-Redondo A
中科院分区:
文献类型:
--
作者:
Soriano-Redondo A
The development and miniaturization of GPS tracking devices has enabled a better understanding of migration phenology, but it can be challenging to identify where and when migration starts and ends, and researchers rely on multiple methods to infer it. Here, we use GPS tracks of 18 trans‐Saharan migrant White StorksCiconia ciconiato determine how the choice of method influences the estimation of migratory timing and discuss its implications. We evaluate and provide R code for the implementation of five alternative methods: spatial threshold, absolute displacement, spatio‐temporal displacement, net squared displacement and change point analysis. Spatial threshold, absolute displacement and spatio‐temporal displacement methods produce, in most cases, significantly different estimates of migration timing and duration as compared with net squared displacement and change point analysis.
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