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全球物种化和多样性的全球模式.
M A M de Aguiar1, M Baranger, E M Baptestini
1New England Complex Systems Institute, Cambridge, Massachusetts 02138, USA.
Nature
|July 17, 2009
概括
即使没有环境选择,生物多样性模式也会出现,由突变和分散驱动. 模拟显示物种化率和物种分布与现实生态数据保持一致.
科学领域:
- 生态生态学 生态生态学
- 进化生物学 进化生物学
- 理论生物学 理论生物学
背景情况:
- 在各种生态系统和种类中观察到的一致的生物多样性模式.
- 中立理论,假设没有选择或相互作用,成功地预测了许多生物多样性模式.
- 现有的中立理论模型通过突变在无性种群中的物种化.
研究的目的:
- 模拟性繁殖,突变和分散的种群中的生物多样性模式.
- 测试中性理论在更复杂的性繁殖模型中的预测能力.
- 在模拟的进化过程下研究生物多样性的新兴特性.
主要方法:
- 基于代理的建模模拟性繁殖,突变和分散的种群.
- 随着时间的推移,模拟物种化率的分析.
- 在模拟环境中检查物种-区域关系和物种丰度分布.
主要成果:
- 模拟的物种发生率表现出时间依赖.
- 种类-面积关系显示了三种不同的缩放模式.
- 物种丰富的分布遵循逻辑正常的模式,稀有物种过多.
- 模型预测量上与来自各种种类和生态系统的经验数据保持一致.
结论:
- 生物多样性模式可以在没有特定的物理障碍或强大的选择压力的情况下出现.
- 性繁殖,突变和分散足以产生复杂的生物多样性模式.
- 这些发现支持并扩大中立理论对生态和进化生物多样性的适用性.
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