温度,而不是净初级生产率,驱动着昆虫飞行活动的大陆范围的变化
1School of Biological Sciences, University of Oklahoma, Norman, OK 73019-0390, USA.
概括
飞行昆虫的丰富程度与温度密切相关,而不是净初级生产率. 了解这些宏观生态模式对于预测昆虫对气候变化的反应至关重要.
科学领域:
- 生态生态学 生态生态学
- 宏观生态学 宏观生态学
- 气候变化生物学 气候变化生物学
背景情况:
- 能源的可用性影响整个生态系统的丰富性模式.
- 温度和净初级生产率是可能导致昆虫繁殖的关键环境因素.
研究的目的:
- 调查温度和净初级生产率在塑造大陆范围飞行昆虫丰度中的作用.
- 利用天气监测雷达数据对昆虫飞行活动进行新的评估.
主要方法:
- 采用美国NEXRAD气象雷达网络的数据,创建近日昆虫飞行活动数据集.
- 分析了跨温度梯度和净初级生产率的昆虫飞行活动.
- 考虑到水的可用性,研究了温度-丰度关系的生物群特异性变化.
主要成果:
- 昆虫飞行活动与年平均气温呈正相关性,解释了不同地点38%的变化.
- 净初级生产率无法解释昆虫数量的显著额外变化.
- 在生物群中观察到昆虫飞行活动的显著差异,温带和亚热带草原的丰度最高.
结论:
- 温度显著限制了昆虫的新陈代谢,发育和飞行活动,塑造了热虫繁多的宏观生态模式.
- 水的可用性调解了干旱 - 枯燥灌木和森林的温度 - 丰度关系.
- 这些发现对于预测未来变暖情景下的昆虫社区动态至关重要,并为全球昆虫生物多样性监测工作做出贡献.
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