综合分析显示陆地昆虫数量有所下降,淡水昆虫数量有所增加
Roel van Klink1,2,3, Diana E Bowler4,5,6, Konstantin B Gongalsky7,8
1German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, 04103 Leipzig, Germany. Roel.klink@idiv.de.
概括
昆虫种群呈现不同的趋势,陆地昆虫每十年减少9%,淡水昆虫增加11%. 这些昆虫数量变化在北美和欧洲最为明显.
科学领域:
- 生态学
- 环境科学
- 保护生物学
背景情况:
- 最近的研究表明,昆虫数量大幅下降, 引发了对生态系统健康的担忧.
- 这些昆虫数量趋势的地理范围和变异性基本未知.
研究的目的:
- 使用大型数据集调查昆虫数量的时空趋势.
- 提供对昆虫种群动态的更细致的理解.
主要方法:
- 收集了166个长期昆虫调查的数据,
- 分析了随着时间的推移而发生的昆虫数量趋势,并考虑了地理差异.
主要成果:
- 观察到不同地点甚至相邻地区的趋势有显著差异.
- 记录了陆地昆虫数量每十年平均下降约9%.
- 记录了淡水昆虫的平均数量每十年增加约11%.
- 北美和欧洲部分地区的发展趋势较强.
- 在保护区发现较弱的趋势,并指出与土地使用驱动因素的关联.
结论:
- 昆虫的繁多趋势表现出相当大的空间和时间异质性.
- 陆地昆虫的数量正在平均下降, 而淡水昆虫的数量正在增加.
- 保护战略可能需要考虑区域差异和土地使用影响.
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