对于网络持久性的强有力的贡献者是最容易受到灭绝的
Serguei Saavedra1, Daniel B Stouffer, Brian Uzzi
1Northwestern Institute on Complex Systems, Northwestern University, Evanston, Illinois 60208, USA.
Nature
|September 16, 2011
概括
在互惠网络中,对稳定的关键贡献者矛盾地更容易受到灭绝的影响. 这挑战了在合作系统中,更大的贡献等于更大的个人利益的假设.
科学领域:
- 生态生态学 生态生态学
- 网络理论 网络理论
- 社会学 社会学 社会学
背景情况:
- 互惠主义网络通过尽量减少竞争来促进共存.
- 与这些网络的贡献相对的利益分配还不太清楚.
研究的目的:
- 调查互惠网络的个人参与者是否获得与他们对网络持久性的贡献成比例的利益.
- 探索合作网络中各个节点所面临的权衡.
主要方法:
- 使用结构和动态方法分析开花植物/昆虫授粉者网络.
- 模拟节点移除,以评估对网络持久性的影响.
- 分析了纽约服装行业15年的设计师和承包商互动时间序列.
主要成果:
- 节点对网络架构有异质的贡献,强有力的贡献者不成比例地影响了持久性.
- 对集体持久性的强有力的贡献者表现出个人生存概率下降和对灭绝的脆弱性增加.
- 这种悖论在生态 (授粉者) 和经济 (服装工业) 网络中被观察到.
结论:
- 一个新的悖论存在于关键网络参与者面临更高的灭绝风险.
- 这些发现对理解生态中的入侵物种和经济系统中的新竞争对手有影响.
- 合作网络的持续性可能不会转化为比例的个人利益或生存.
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