Abundance patterns of European breeding birds
Abundance patterns of European breeding birds
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欧洲种鸟的丰度模式
DOI：
10.1111/j.1600-0587.2000.tb00276.x
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发表时间：
2000
期刊：
影响因子：
5.9
通讯作者：
R. Gregory
中科院分区：
文献类型：
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作者：
R. Gregory
使用欧洲鸟类数据库的数据，对48个欧洲国家（包括自治区）的国家繁殖鸟类种群规模的频率分布进行了研究。在40个国家中，化学转换丰度的频率分布是左偏的：10个国家有显著的左偏，2个国家有正偏。列入低质量的数据并没有改变丰度模式主要是左偏的结论。居民和移民繁殖鸟类的abbirth模式不同，居民左偏，移民对数正态分布。偏度与一个国家内的物种数呈负相关。在低样本量下，左偏和右偏都很明显，但左偏在大样本量下占主导地位。这一模式的部分原因是岛屿和大陆国家的繁殖种群之间的差异。固定样本量的恢复程序表明，居民和候鸟的偏态模式不同，一致的样本量无关。如果欧洲的鸟类被视为一个单一的组合，它们的丰度模式是倾斜的，但这是由极少数流浪繁殖者驱动的。
The frequency distribution of national population sizes of breeding birds was examined for each of 48 European countries, including autonomous regions, using data from the European Bird Database. The frequency distribution of logarithmically transformed abundance was left skewed in 40 countries: there was significant left skew in 10, and positive skew, in 2 countries. The inclusion of data classed as of low quality did not alter the conclusion that abundance patterns were predominantly left skewed. Abundance patterns of resident and migrant breeding birds differed; residents were left skewed, migrants were lognormal. Skewness was correlated negatively the number of species within a country. At low sample size, both left and right skews were evident, but left skews predominated at larger samples sizes. This pattern was driven partly by a difference between breeding populations on islands and on continental countries. Resampling procedures with fixed sample size showed that resident and migrant birds differed consistently in their patterns of skew, independent of sample size. If the birds of Europe were treated as a single assemblage, their abundance pattern was left skewed but this was driven by a very small number of vagrant breeders.