敌对的生物相互作用减轻了变暖对木材分解的积极影响
Robert J Warren1, Paul T Frankson2, Jacqueline E Mohan2
1Department of Biology, SUNY Buffalo State University, Buffalo, NY, USA. warrenrj@buffalostate.edu.
Oecologia
|December 3, 2024
概括
全球变暖增加了白活动,但掠食性限制了木材的分解. 暖化对分解的影响被增加的种群中和,突出显示了自上而下的生态控制.
科学领域:
- 生态生态学 生态生态学
- 林业林业 林业 林业 林业
- 气候变化生物学 气候变化生物学
背景情况:
- 枯木是重要的森林碳储存和息地.
- 全球变化的驱动因素,如变暖和息地碎片化,可以相互作用.
- 和是关键的分解者,受温度和息地的影响.
研究的目的:
- 研究实验性变暖如何影响白对木材的分解.
- 确定捕食 (本地和非本地) 是否会影响白的分解率.
- 评估气候变暖对分解的净影响,考虑这些相互作用.
主要方法:
- 在美国南部森林中使用了实验性变暖场 (环境温度高于2.5°C) .
- 在微观尺度上监测了白和的数量和活动.
- 使用野外木材试验测量木材分解率.
主要成果:
- 长活动强烈控制木材分解;随着长的大量增加,质量损失增加.
- 随着实验性的变暖,本土和非本土的数量都显著增加.
- 变暖对分解的净影响很小,因为的掠食增加限制了白活动.
结论:
- 掠食性,而不是变暖,是白驱动木材分解的主要调节者.
- 的自上而下的生态控制可以取代变暖对分解的直接影响.
- 森林管理必须在气候变化背景下考虑掠食者-猎物动态.
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