A trait-based theory of island biogeography

该项目将开发一种基于属性的岛屿生物地理学和元食物网理论。它将把物种特征和温度对扩散运动的限制整合到元食物网络模型中。此外，还将研究随机扰动的后果。在第一个子项目中，将使用一种新的食物网组装模型来预测作为空间过程、当地生物过滤和环境条件的函数的空间食物网拓扑的可变性。这将揭示物种特征的三个维度的重要性，这些特征与群落聚集的运动、相互作用和耐受性有关。结果将在应力和热浪等干扰的梯度上推广。随后的一个分项目将把依赖于特性的扩散模型应用于岛屿群岛的空间尺度，以预测生物多样性的模式和活跃的分散物种群体的特性分布，如鸟类及其分散的植物。这些结果将提供对物种特征和环境条件如何影响整个群岛的生物多样性和特征模式的预测性理解。结果将被用来开发一个宏观食物网络模型，该模型预测作为当地营养和空间过程、气候条件、对物种池的进化限制和随机扰动的函数的食物网络拓扑从局部到生物地理尺度的差异。总体而言，该项目将通过揭示物种特征和环境条件的动态对群岛岛屿或群居生境斑块的生物多样性格局的重要性，从而对戴纳康姆研究单位作出贡献。

This project will develop a property-based theory of island biogeography and meta-food webs. It will integrate the constraints of species traits and temperature on dispersal movement into meta-food web models. In addition, the consequences of stochastic perturbations will be investigated. In a first subproject, a novel food web assembly model will be used to predict the variability of food web topology in space as a function of spatial processes, local biotic filtering, and environmental conditions. This will reveal the importance of three dimensions of species traits related to movement, interaction, and tolerance for community assembly. Results will be generalized across gradients of stress and disturbance such as heat waves. A subsequent subproject will apply the trait-dependent dispersal model to the spatial scale of island archipelagos to predict patterns in biodiversity and trait distributions of actively dispersing species groups such as birds and the plants that are dispersed by them. The results will provide a predictive understanding of how species traits and environmental conditions influence biodiversity and trait patterns across archipelagos. Results will be used to develop a macro-food web model that predicts variance in food web topology from local to biogeographic scales as a function of local trophic and spatial processes, climatic conditions, evolutionary constraints on the species pool, and stochastic perturbations. Overall, this project will thus contribute to the DynaCom research unit by revealing the importance of species traits and dynamics in environmental conditions for patterns in biodiversity across archipelagic islands or metacommunity habitat patches.