森林边缘在全球范围内比内部更温暖,并且超过了植被生产力的最佳温度
Josephine Elena Reek1, Thomas W Crowther1, Thomas Lauber1
1Institute for Integrative Biology, ETH Zurich, Zürich, Switzerland.
概括
森林边缘比森林内部更温暖,影响当地气候. 持续的森林砍伐减少了森林适度温度的能力,可能损害生态系统的生产力和弹性.
科学领域:
- 生态生态学 生态生态学
- 气候科学 气候科学
- 遥感 遥感 遥感 遥感
背景情况:
- 森林通过吸收二氧化碳来调节全球气候.
- 森林创造了微型气候,缓冲了当地极端温度.
- 森林砍伐和碎片化将森林内部转变为边缘环境,改变微气候条件.
研究的目的:
- 量化森林边缘的接近如何影响不同生物体和季节的热条件.
- 评估森林碎片化对当地气候调节的影响.
主要方法:
- 利用来自近1300万个地点的全球卫星衍生地表温度数据.
- 分析了与森林边缘相邻的热条件,跨越各种生物体和季节.
主要成果:
- 平均而言,森林边缘总是比森林内部更温暖.
- 森林边缘的变暖程度因生物群类型和季节而有很大变化.
- 森林边缘的表面温度经常超过植被生产率的最佳水平,特别是在夏季热带森林.
结论:
- 内陆森林息地的持续丧失将降低剩余森林缓冲当地气候条件的能力.
- 由于森林碎片化而改变的微气候可能会对生态系统的生产力和弹性产生负面影响.
- 了解森林边缘影响对于有效的森林保护和气候变化减缓战略至关重要.
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