Food-web flexibility effects on network stability and ecosystem processes

食物网灵活性对​​网络稳定性和生态系统过程的影响

• 批准号: 101454851
• 负责人: Professor Dr. Ulrich Brose
• 金额: --
• 依托单位: Arbeitsgruppe Theorie komplexer Systeme
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2009
• 资助国家: 德国
• 起止时间: 2008-12-31 至 2015-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/101454851?language=en
• 关键词: Food; web; flexibility; effects; network

The structure of natural communities can be described by complex networks with nodes representing populations and links (edges) characterizing feeding interactions that direct energy and biomass flows. Traditionally, the link structure of these networks and the population traits such as their body masses have been viewed as static properties that determine species’ population dynamics. More recent modelling approaches allow link adaptation according to adaptive foraging algorithms and variance in population traits in size-structured population models. Under these approaches, the characteristics of the nodes and links are flexible, and the network structure is a consequence of dynamics (and not merely the cause). This project is aiming to develop a mechanistic understanding of how flexibility in the link structures (adaptive foraging) and the node traits (size-structured populations) affect the stability of complex food webs and ecosystem processes. Ecosystem processes (e.g., primary production) will be monitored to analyze if adaptive forces at the population level optimize processes at the network level. As other biological networks are also flexible, this project may fertilize other disciplines of complex network science.

自然群落的结构可以通过复杂的网络来描述，其中的节点代表种群，链接（边缘）表征引导能量和生物量流动的摄食相互作用。传统上，这些网络的链接结构和种群特征（例如它们的体重）被视为决定物种种群动态的静态属性。最近的建模方法允许根据自适应觅食算法和规模结构种群模型中种群特征的变化进行链路适应。在这些方法下，节点和链路的特征是灵活的，并且网络结构是动态的结果（而不仅仅是原因）。该项目旨在从机制上理解链接结构（适应性觅食）和节点特征（规模结构种群）的灵活性如何影响复杂食物网和生态系统过程的稳定性。将监测生态系统过程（例如初级生产），以分析种群层面的适应性力量是否优化网络层面的过程。由于其他生物网络也很灵活，因此该项目可能会丰富复杂网络科学的其他学科。