arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2304.09693q-bio.PE
收藏

海草物种竞争模型:对称情形的动力学

A model for seagrass species competition: dynamics of the symmetric case

Pablo Moreno-Spiegelberg, Damià Gomila

AI总结:

本文构建二维双物种海草种群动力学模型,分析对称互惠情形下的四参数分岔结构,将参数空间划分为十类并归并为五种生态机制,从而分类共存草甸的密度分布与动力学行为。

摘要:

我们提出了一个一般性的种群动力学模型,用于描述在二维空间中生长并相互作用的两种海草物种。该模型包含考虑海草克隆生长特征的空间项,以及通过净死亡率实现的物种间耦合。我们同时考虑种内和种间的促进与竞争相互作用,并允许密度依赖的相互作用机制。本文研究具有互惠相互作用的高度相似物种情形,这使得模型参数数量可减少至仅四个,而其分岔结构可被视为完整系统的主干。我们发现,参数空间可划分为十个具有定性不同分岔图的区域。这些区域还可进一步归并为仅五种具有不同生态学解释的机制。我们的分析能够对两种共存物种形成的海草草甸所有可能的密度分布和动力学行为进行分类。

英文摘要:

We propose a general population dynamics model for two seagrass species growing and interacting in two spatial dimensions. The model includes spatial terms accounting for the clonal growth characteristics of seagrasses, and coupling between species through the net mortality rate. We consider both intraspecies and interspecies facilitative and competitive interactions, allowing density-dependent interaction mechanisms. Here we study the case of very similar species with reciprocal interactions, which allows reducing the number of the model parameters to just four, and whose bifurcation structure can be considered the backbone of the complete system. We find that the parameter space can be divided into ten regions with qualitatively different bifurcation diagrams. These regimes can be further grouped into just five regimes with different ecological interpretations. Our analysis allows the classifying of all possible density distributions and dynamical behaviors of meadows with two coexisting species.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑