功能性反应可以预测侵入性,但不能预测热带影响
Marine A Courtois1,2, Chloé Souques1, Yann Voituron1
1Universite Claude Bernard Lyon 1, CNRS, ENTPE, LEHNA, UMR 5023, Villeurbanne, France.
The Journal of animal ecology
|February 17, 2026
概括
侵入性物种比非侵入性物种具有更高的功能反应 (FR),但仅在它们的原生范围内. 在被入侵的范围中,它们的FR是可比的,这挑战了入侵风险评估的直接推断.
科学领域:
- 生态生态学 生态生态学
- 侵入性物种 生物学 生物学
- 生物多样性研究 生物多样性研究
背景情况:
- 生物入侵显著侵蚀生物多样性,入侵物种往往比本地物种表现出更大的热带影响.
- 功能响应 (FR) 测试,测量与猎物密度相对的消费率,是评估这些影响的关键.
- 像攻击率 (a) 和处理时间 (h) 这样的FR参数用于比较物种的捕食效率.
研究的目的:
- 为了调查功能响应 (FR) 参数是否在入侵物种之间在它们的本土范围和入侵范围之间有所不同.
- 测试FR测量在物种分布中直接可推断的假设.
- 了解生物地理背景在入侵成功和生态影响中的作用.
主要方法:
- 对来自45种淡水鱼类的269个FR观测结果进行了基因组学纠正的比较分析.
- 种类被分为非侵入性或入侵性,入侵性物种进一步通过采样位置 (本地与入侵范围) 进行区分.
- 关键FR参数 (攻击率和处理时间) 根据物种类型和采样范围进行分析.
主要成果:
- 侵袭性物种比非侵袭性物种显示出更高的FR,但仅在其本土范围采样时.
- 侵袭性物种在其侵袭范围内的FR值与非侵袭性物种相比较.
- 在非侵入性物种中,攻击率随着温度的下降而下降,但在入侵性物种中,从引入范围开始,攻击率往往会增加,这表明气候变化的影响.
结论:
- 高FR使物种倾向于入侵性,但这些特征可能不会在被入侵的生态系统中持续或表现相同.
- 生物地理环境至关重要;在本地范围测量FRs不能直接推断,以预测新环境中的食用影响.
- 未来的入侵风险评估必须纳入生物地理因素,并考虑入侵范围中的环境条件如何影响物种相互作用.
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