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arXiv 0903.1753q-bio.PEcond-mat.dis-nncond-mat.stat-mechq-bio.OT
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biodiversity的非中性学说〈动〉

Non-neutral theory of biodiversity

Ginestra Bianconi, Luca Ferretti, Silvio Franz

摘要:

我们提出了一个非中性的随机模型的动态发生在一个元社区生态系统中存在的迁移。该模型提供了一个框架来描述多种生态情景的出现,并表现在两个极端的限制,无论是作为生物多样性的统一中性学说〈动〉<动>或作为Bak-Sneppen模型。有趣的是,该模型显示了一个冷凝相变,其中一个物种成为优势物种,生态系统的多样性大大减少,生态系统是非平稳的。这一相变将竞争排斥原理扩展到开放生态系统,并可能与研究入侵物种对本土生态系统的影响有关。

英文摘要:

We present a non-neutral stochastic model for the dynamics taking place in a meta-community ecosystems in presence of migration. The model provides a framework for describing the emergence of multiple ecological scenarios and behaves in two extreme limits either as the unified neutral theory of biodiversity or as the Bak-Sneppen model. Interestingly, the model shows a condensation phase transition where one species becomes the dominant one, the diversity in the ecosystems is strongly reduced and the ecosystem is non-stationary. This phase transition extend the principle of competitive exclusion to open ecosystems and might be relevant for the study of the impact of invasive species in native ecologies.

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。

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