Mougi Akihiko
Institute of Agricultural and Life Sciences, Academic Assembly, Shimane University, 1060 Nishikawatsu-Cho, Matsue, 690-8504, Japan.
Sci Rep. 2025 Aug 17;15(1):30074. doi: 10.1038/s41598-025-15320-1.
Ecosystem stability is influenced by interspecific interactions, with recent research focusing on how third-party species modify these interactions. However, the impact of "intraspecific higher-order interactions," where the presence of one species affects intraspecific interactions within another species, on ecosystem stability has been less explored. This study addresses this gap by developing a mathematical model to investigate how such interactions influence stability. The analysis shows that when higher-order interactions increase intraspecific competition within another species, stability improves, especially in large, complex ecosystems. However, this effect is not observed if the interactions solely increase or decrease competition without a mixture of both. These findings highlight the importance of both positive and negative effects on intraspecific competition for enhancing stability in complex ecosystems. This emphasizes the need for further research on the role of higher-order interactions in shaping ecosystem stability, particularly in complex ecosystems.
生态系统稳定性受种间相互作用影响，近期研究聚焦于第三方物种如何改变这些相互作用。然而，“种内高阶相互作用”（即一个物种的存在影响另一个物种的种内相互作用）对生态系统稳定性的影响尚未得到充分探索。本研究通过建立数学模型来研究此类相互作用如何影响稳定性，填补了这一空白。分析表明，当高阶相互作用增加另一个物种的种内竞争时，稳定性会提高，尤其是在大型复杂生态系统中。然而，如果相互作用仅增加或减少竞争而没有两者的混合，则不会观察到这种效果。这些发现凸显了种内竞争的正负效应对于增强复杂生态系统稳定性的重要性。这强调了进一步研究高阶相互作用在塑造生态系统稳定性中的作用的必要性，特别是在复杂生态系统中。
