特征与利基关系的替代措施:对沙甲虫的分散特征的测试
Ryan C Burner1,2, Jörg G Stephan3, Lukas Drag4,5
1U.S. Geological Survey Upper Midwest Environmental Sciences Center La Crosse Wisconsin USA.
Ecology and evolution
|October 23, 2023
概括
选择正确的生态指标对于理解特征-利基关系至关重要. 不同的方法,如社区加权平均值 (CWM) 和联合物种分布模型 (JSDM),对物种特征如何影响它们的生态产生了不同的见解.
科学领域:
- 生态生态学 生态生态学
- 基于特征的生态学
- 社区生态学社区生态学
背景情况:
- 功能性特征方法在生态学中对于理解社区集会至关重要.
- 然而,通常缺乏明确的假设,将特征与环境梯度 (特征-利基关系) 联系起来.
- 对于社区功能结构的不同指标产生了不同的推断,但比较很少.
研究的目的:
- 调查如何选择的度量影响关于特征-利基关系的推断.
- 将社区加权平均特征值 (CWM) 与等级联合物种分布模型 (JSDM) 进行比较,以估计特征-利基关系.
- 评估沙甲虫的分散特征和环境梯度之间的关系.
主要方法:
- 在芬兰碎片化森林中研究了依赖枯木的甲虫.
- 确定了环境过器:气候,森林年龄和枯木量.
- 使用翅膀形态 (特征) 的环境过器与分散能力 (生态功能) 有关.
- 使用CWM和JSDM (Γ) 估计测试了18种假设的特征-利基关系.
主要成果:
- 社区加权平均值 (CWM) 比JSDM (Γ) 的估计更有可能支持特征-利基关系.
- 分散特征解释了多达13%的物种实现的.
- 影响的方向与不到11%-39%的假设一致,这取决于指标.
结论:
- 连接昆虫形态特征与生态功能仍然具有挑战性,即使有明确的概念联系.
- 在发展假设时需要谨慎,特别是对于不那么明显的特征-功能关系.
- 度量选择显著影响生态推断:CWM解释了社区组成,而JSDM更好地估计了对物种的特征影响.
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