比较北美农作物田中奶草被铲除前后夏季、秋季和冬季帝王斑数量的估计值

IF 3.2 2区 农林科学 Q1 ENTOMOLOGY Insect Conservation and Diversity Pub Date : 2023-09-14 DOI:10.1111/icad.12687
John Pleasants, Wayne E. Thogmartin, Karen S. Oberhauser, Orley R. Taylor, Carl Stenoien
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引用次数: 0

摘要

自20世纪90年代中期以来,对msamuxico越冬君主所占据的面积的测量显示出下降。然而,对帝王蝶的夏季调查并没有显示出类似的下降。这种差异导致了一个命题,即夏季帝王蝶的数量实际上是稳定的,而迁徙过程中死亡率的增加导致了越冬数量的下降。另一种与之竞争的假设是,这种差异是由于夏季计数的抽样偏差造成的,而夏季种群数量的下降是由于20世纪90年代末至21世纪初中期,马利筋栖息地从农田中被消灭。我们认为,抽样偏差发生在作物田乳草减少的时期,是由于没有在作物田取样造成的。我们检查了在秋季迁徙期间进行的三种人口规模测量和四种夏季调查测量,并将它们与越冬测量进行了比较。迁徙帝王蝶的计数预计不会有这种抽样偏差,因为迁徙帝王蝶来自所有栖息地,包括农田。在铲除马利筋期间,迁徙种群数量与越冬种群数量呈正相关,而夏季调查种群数量与越冬种群数量呈正相关。马利筋从农田根除后,所有种群测量值相互相关。这些结果表明,在根除前阶段,夏季种群数量不是夏季种群规模的准确度量。在越冬地观察到的种群趋势反映了影响夏季种群大小的因素,主要是乳草的损失。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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A comparison of summer, fall and winter estimates of monarch population size before and after milkweed eradication from crop fields in North America

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来源期刊
CiteScore
7.70
自引率
8.60%
发文量
58
审稿时长
>12 weeks
期刊介绍: To publish papers of the highest scientific quality within the general area of insect (and other arthropods) conservation and diversity covering topics ranging from ecological theory to practical management. Papers are invited on the following topics: Conservation genetics; Extinction debt; Long-term conservation planning and implementation; Global implications of local or national conservation actions; Management responses of species and communities; Captive breeding programs; Comparisons of restored and natural habitats; Biogeography; Global biodiversity; Metapopulation dynamics; Climate change: impacts on distributions and range; Invasive species: impacts and control; Effects of pollution; Genetic threats to diversity by introgression; Effects of fragmentation on diversity and distribution; Impact of agricultural and forestry practices on biodiversity; Enhancing urban environments for diversity and protection; Biodiversity action plans: can we scale up from insects?; Effectiveness and choice of indicator species; Soil biodiversity and interactions with above-ground biodiversity; Ecological interactions at local levels; Ecological and evolutionary factors influencing diversity and local, regional and global scales; Sustainable livelihoods and training on the ground; Integrating science and policy.
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