竞争生态网络中密度调节与稳定性之间的相互联系

Enzyme regulation and mutation in a model serial dilution ecosystem

Microbial communities are ubiquitous in nature and come in a multitude of forms, ranging from communities dominated by a handful of species to communities containing a wide variety of metabolically distinct organisms. This huge range in diversity is not a curiosity - microbial diversity has been linked to outcomes of substantial ecological and medical importance. However, the mechanisms underlying microbial diversity are still under debate, as simple mathematical models only permit as many species to coexist as there are resources. A plethora of mechanisms have been proposed to explain the ori…

弱信号，强辩论：通过模型不确定性视角看密度依赖与种群调节

Weak signals, strong debates: Density dependence and population regulation through the lens of model uncertainty

本文通过三个论点论证种群调节的不可处理性，指出其结论高度依赖模型结构，并提出新度量“有效自回归参数”估计密度依赖，发现其强度因种群而异且平均半衰期为3年。

Increased persistence via asynchrony in oscillating ecological populations with long-range interaction

Understanding the influence of structure of dispersal network on the species persistence and modeling a much realistic species dispersal in nature are two central issues in spatial ecology. A realistic dispersal structure which favors the persistence of interacting ecological systems has been studied in [Holland \& Hastings, Nature, 456:792--795 (2008)], where it is shown that a randomization of the structure of dispersal network in a metapopulation model of prey and predator increases the species persistence via clustering, prolonged transient dynamics, and amplitudes of population fluctuatio…

A new spin on optimal portfolios and ecological equilibria

We consider the classical problem of optimal portfolio construction with the constraint that no short position is allowed, or equivalently the valid equilibria of multispecies Lotka-Volterra equations with self-regulation in the special case where the interaction matrix is of unit rank, corresponding to species competing for a common resource. We compute the average number of solutions and show that its logarithm grows as $N^α$, where $N$ is the number of assets or species and $α\leq 2/3$ depends on the interaction matrix distribution. We conjecture that the most likely number of solutions is …

入侵外来物种管理的多边治理：具有阿利效应的生态-经济模型

Multilateral governance of invasive alien species management: An ecological-economic model with Allee effect

该研究构建含阿利效应的两区域入侵外来物种生态-经济模型，对比合作与非合作管理的结果，发现合作管理可扩大根除初始条件、降低总成本，为IAS多边治理提供理论支撑。

复杂群落的稳定性：基于离散时间动力学的视角

Stability of complex communities: A perspective from discrete-time dynamics

针对非重叠世代物种群落，本文提出基于离散时间动力学的稳定性量化框架，发现自我调节强度先促进后破坏稳定性，且多样化与弱相互作用能增强群落稳定性。