Insects across the globe are facing multiple anthropogenic pressures. A study combining several data streams and advanced modelling helps to unravel the main factors underlying declines in monarch butterfly populations.

中文翻译：

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昆虫数量减少的复杂原因

全球昆虫正面临多重人为压力。一项结合多个数据流和高级建模的研究有助于揭示帝王蝶种群下降的主要因素。