致癌性压力改变了全球侵袭性和本地平物种之间的捕食者-猎物相互作用
Antoine M Dujon1,2, Jonas Courtalon2, Anna Miltiadous1
1Deakin University Geelong, School of Life and Environmental Sciences, Waurn Ponds, VIC 3216, Australia.
iScience
|December 24, 2025
概括
环境变化增加了癌症风险,影响了物种相互作用. 紫外线 (UVB) 辐射对侵袭性平面动物造成了更大的伤害,减少了捕食和繁殖,改变了生态动态.
科学领域:
- 生态生态学 生态生态学
- 癌症生态学 癌症生态学
- 侵袭生物学 侵袭生物学
背景情况:
- 人类驱动的环境变化正在增加瘤性压力 (增加瘤风险的因素).
- 致癌性压力对物种相互作用的生态影响在很大程度上未得到量化.
- 了解这些影响对于保护和管理入侵物种至关重要.
研究的目的:
- 研究UVB诱导的瘤性压力对侵袭性掠食者*Girardia tigrina*和本地猎物*Cura pinguis*之间的相互作用的影响.
- 为了确定UVB辐射对DNA的损伤是否会影响猎物的脆弱性或捕食者的表现.
- 评估瘤性压力对物种相互作用和入侵动态的影响.
主要方法:
- 将澳大利亚的两种淡水平物种 (*G. tigrina* 和 *C. pinguis*) 暴露在UVB辐射中.
- 在两种物种暴露后量化DNA损伤,运动和无性繁殖率.
- 分析了 *G. tigrina* 在 *C. pinguis* 上的掠食率的变化.
主要成果:
- 本地平菌 (*C. pinguis*) 与入侵性 *G. tigrina* 相比,呈现出较少的UVB诱导的DNA损伤,这可能是由于颜色更深的原因.
- *G. tigrina*的掠食率因紫外线暴露而降低,这表明与DNA修复相关的能量成本.
- 在这两种物种中,紫外线暴露会影响运动,G. tigrina* 部分恢复,而C. pinguis* 长时间不运动.
- *G. tigrina*的无性繁殖被UVB显著抑制,这表明DNA修复和繁殖之间的权衡.
结论:
- 由UVB辐射引起的瘤性压力可以显著改变物种相互作用和入侵动态.
- 紫外线对侵袭性和本地平原菌的影响差异凸显了它在调节生态竞争中的潜在作用.
- 将癌症生态与保护和入侵生物学相结合,对于了解和减轻环境变化影响至关重要.
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