针茅属(Stipa L.)物种生态位属性与地理分布范围关系研究

物种生态位属性(宽度和位置)与地理分布范围之间关系的研究对于了解气候变化背景下物种的可能响应具有重要的理论价值。目前，关于生态位属性的测定，多数研究采用基于资源或环境关联和基于物种间相互作用的方法，而将二者与移栽实验相结合的研究尚不多见。同时，有关物种生态位宽度与生态位位置对地理分布范围的相对作用大小仍存在争议。针茅属(Stipa L.)植物广布于全球温带地区，不同物种常随水热等环境梯度形成一系列替代分布，尤其在水分梯度上区域分异明显，因而是探究生态位相关理论的理想类群。本项目拟以我国5种近缘针茅属物种为研究对象，将移栽实验(基于性能响应)与模型估算(基于资源或环境关联)方法相结合，共同探讨物种水分生态位属性与地理分布范围的关系。预期研究结果不仅可为长期以来相关理论的争论提供数据支持，而且也有助于预测气候变化情景下不同针茅属物种的扩散动态或可能的适应，为针茅属植物的保护与利用提供理论参考。

Focusing on the relationship between species’ niche properties (breadth and position) and geographic distribution range is vital for understanding the possible responses of species under ongoing climate change. Currently, when determining niche properties, most studies used the resource or environmental associations based method and/or the interaction based method, while few studies combined them with transplanting experiments. Meanwhile, the relative effects of niche breadth and niche position on the geographic distribution range of species have still been controversial. Feather grasses (Stipa L.) are widely distributed in temperate regions of the world, and different species often form a series of alternative distributions with environmental gradients such as water and heat, especially in the water gradient. Therefore, species of the genus Stipa are ideal for exploring niche theories. This project intends to explore the water niche attributes and geographic distribution of 5 Stipa species in China, by combining transplanting experiments (based on performance response) and model estimation (based on resource or environmental associations) methods. Ideally, the results could not only provide data support for the related theoretical debates, but also help predict the diffusion dynamics or possible adaptations of different Stipa species under climate change scenarios. Additionally, it could provide theoretical guidance for the protection and management of feather grasses.