环境过和限制相似性的证据取决于空间尺度和不相似度指标
Maria A Perez-Navarro1, Harry E R Shepherd1, Joshua I Brian1
1Department of Geography, King's College London, London, UK.
Ecology
|November 10, 2025
概括
达尔文的归化难题发现取决于空间尺度和不相似度指标. 侵入性物种的成功与现场规模的环境过和社区规模的功能特征有关.
科学领域:
- 生态生态学 生态生态学
- 进化生物学 进化生物学
- 侵入性物种研究 侵入性物种研究
背景情况:
- 达尔文的自然选择理论提出了关于生物入侵成功的相互矛盾的假设:预适应和限制相似性.
- 之前的研究由于空间尺度不一致以及缺乏整合的功能/遗传学数据,产生了不同的结果.
研究的目的:
- 通过在精细的空间尺度上测试这两种假设来解决入籍难题.
- 调查功能和遗传学不相似性对入侵成功的影响.
- 识别有利于入侵物种建立的特征和条件.
主要方法:
- 在Cedar Creek生态系统科学保护区进行了33年的草原调查.
- 对303种血管植物种群的功能差异,遗传学距离,环境共变性和物种起源进行分析.
- 在邻里 (0.5 m2) 和现场 (~40 m2) 尺度上测试假设.
主要成果:
- 达尔文的归化难题的发现因空间尺度和不相似度量而异.
- 在现场规模上支持预适应假设 (环境过).
- 使用功能不相似性,在邻居规模上支持限制相似性;使用遗传学距离支持预适应.
- 侵入性物种表现出与功能特征 (高度,LDMC,种子质量) 和环境条件 (土壤N,殖民以来的时间) 相关的明显的丰度模式.
结论:
- 侵袭生物学中的不一致结果可能源于单个不相似度指标和不适当的空间尺度.
- 综合多个不相似度指标和相关空间尺度的细微方法对于测试入侵假设至关重要.
- 了解入侵动态需要考虑生态过和跨尺度物种特征相互作用.
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