风吹导致碳水化合物和醇度下降,并在挪威杉木中增加单二烯排放
Linda M A Lehmanski1, Lara M Kösters2, Jianbei Huang1
1Department of Biogeochemical Processes, Max Planck Institute for Biogeochemistry, Jena, Germany.
PloS one
|May 28, 2024
概括
气候变化增加了森林害虫的风险. 被风吹倒的树木表现出明显较低的防御能力 (糖,) 和较高的挥发性排放,吸引了像Ips typographus这样的树皮甲虫.
科学领域:
- 林业和生态 林业和生态
- 气候变化影响 气候变化影响
- 森林昆虫学 森林昆虫学
背景情况:
- 极端天气事件,由气候变化加剧,削弱树木,增加对昆虫入侵的易感性.
- 在风暴破坏后,挪威杉树群特别容易受到树皮甲虫 (Ips typographus) 的攻击.
研究的目的:
- 评估风吹对树木活力和防御机制的影响.
- 量化非结构性碳水化合物 (NSCs),化合物和挥发性单二烯排放在风吹与立树中的变化.
主要方法:
- 在现场测量NSC度,防御和挥发性单二烯排放.
- 在4个月的时间内,风吹树和站立的控制树之间的比较.
主要成果:
- 风吹的树木显示了糖 (78%) 和 (37%) 度的显著下降,包括果糖 (-83%) 和葡萄糖 (-85%).
- 在被风吹倒的树木中,taxifolin度下降了50.1%.
- 在被风吹倒的树木中,单二烯排放量是风吹倒的树木的25倍,而α-二烯 (23倍),β-二烯 (27倍) 和3-二烯 (90倍) 的排放量显著增加.
结论:
- 风吹着的树木已经削弱了抗草食动物和抗病原体的防御能力.
- 风吹的树木产生的高挥发性烯排放可能会作为皮革甲虫吸引力和宿主选择的线索.
- 需要进一步的研究,以了解改变的形状对树皮甲虫行为的确切影响.
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