Influence of chaotic dynamics on the coexistence of traits: Experimental studies with aquatic microbes

混沌动力学对性状共存的影响：水生微生物的实验研究

• 批准号: 394824977
• 负责人: Professor Dr. Hartmut Arndt
• 金额: --
• 依托单位: Workgroup General Ecology
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/394824977?language=en
• 关键词: Influence; chaotic; dynamics; coexistence; traits

Mechanisms maintaining biodiversity have puzzled biologists since decades, as the number of limiting resources should limit the possible number of coexisting species. This paradox has not been solved yet. Theoretically, non-linear interactions can lead to oscillating and chaotic dynamics allowing for the maintenance of more species/traits than the number of available resources. We would like to test our original model results experimentally using a well-defined system of microbes with up to six different traits of bacteria and protists regarding the occurrence of oscillating long-term coexistence on a limited number of resources. We would like to check for the potential fundamental importance of non-linearity and oscillations for maintaining diversity of traits in different communities. The main objective of this study is to experimentally assess how extrinsic (environmental factors) and intrinsic (community properties) factors influence the coexistence of traits. Theoretically, oscillations allow the coexistence of many genotypes even if only slightly differing regarding their ecological characteristics, thus significantly supporting micro-evolutionary processes.

维持生物多样性的机制几十年来一直困扰着生物学家，因为限制性资源的数量应该限制共存物种的可能数量。这个矛盾还没有得到解决。从理论上讲，非线性相互作用可能导致振荡和混沌动力学，允许维持比可用资源数量更多的物种/特征。我们希望通过实验测试我们的原始模型结果，使用一个定义良好的微生物系统，该系统具有多达六种不同的细菌和原生生物特征，涉及在有限数量的资源上振荡长期共存的情况。我们想检查非线性和振荡对维持不同群落特征多样性的潜在基本重要性。本研究的主要目的是通过实验评估外在因素（环境因素）和内在因素（群落属性）对性状共存的影响。从理论上讲，振荡允许许多基因型共存，即使它们的生态特征略有不同，因此显著支持微进化过程。