首页> 外文期刊>Israel Journal of Zoology >A SPECTER OF COEXISTENCE: IS CENTRIFUGAL COMMUNITY ORGANIZATION HAUNTED BY THE GHOST OF COMPETITION?
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A SPECTER OF COEXISTENCE: IS CENTRIFUGAL COMMUNITY ORGANIZATION HAUNTED BY THE GHOST OF COMPETITION?

机译:共存的幽灵:离心社区组织是否因竞争的幽灵而困扰?

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摘要

In a centrifugally organized community species prefer the same habitat (called "core") but differ in their secondary habitat preferences. The first model of centrifugal community organization (CCO) predicted that optimally foraging, symmetrically competing species would share use of the core habitat at all density combinations. But one might also assume that the competition in the core habitat is asymmetrical, that is, that one of the species (the dominant) has a behavioral advantage therein. In this study, we asked how should habitat use evolve in a centrifugally organized community if its species compete asymmetrically in the core habitat? To address this question we developed an "iso-leg model". The model predicts that in a centrifugally organized community, asymmetric competition promotes the use of the core habitat exclusively by the dominant species at most points in the state space. The separation of the core habitat use by the species ("the ghost of competition past") may be either complete or partial ("partial ghost"), and behavior at the stable competitive equilibrium between the species could determine whether coexistence should occur at the "complete-" or the "partial ghost" regions. This version of CCO should be a common feature of competitive systems.
机译:在一个离心组织的社区物种中,更喜欢相同的栖息地(称为“核心”),但其次要栖息地偏好不同。离心社区组织(CCO)的第一个模型预测,最佳觅食,对称竞争的物种将在所有密度组合下共享核心栖息地的使用。但是,也许还可以认为核心栖息地中的竞争是不对称的,即其中一个物种(主要)在其中具有行为优势。在这项研究中,我们询问在一个离心组织社区中栖息地的使用应如何进化,如果其物种在核心栖息地中不对称地竞争?为了解决这个问题,我们开发了一个“ ISO-LEG模型”。该模型预测,在一个离心组织的社区中,不对称竞争促进了州空间中最多的主要物种仅由主要物种的核心栖息地使用。物种(“过去的竞争的幽灵”)将核心栖息地使用的分离可能是完整的或部分的(“部分幽灵”),并且该物种之间稳定的竞争平衡的行为可以确定是否应在该物种之间发生“完整”或“部分幽灵”区域。此版本的CCO应该是竞争系统的共同特征。

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