arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1004.2271q-bio.PEcond-mat.stat-mechphysics.bio-ph
收藏

群落聚集和物种分布的统计力学

The statistical mechanics of community assembly and species distribution

Colleen K. Kellya, Stephen J. Blundell, Michael G. Bowler, Gordon A. Fox, Paul H. Harvey, Mark R. Lomas, F. Ian Woodward

摘要:

从理论上讲,处于或接近平衡物种数的群落会抵制新种〈动〉<动>。这种“生物抗性〈动〉<动>”最近受到了质疑,因为外来物种成功地进入了不同的自然群落。分布在全球16个地点的5350个植物物种的10,409个归化数据显示,物种在地点和地点对物种数量的指数分布。这些指数信号的统计力学的物种分布,假设两个条件。首先,物种和地点是等价的,要么是相同的(“中性”),要么是如此复杂,以至于一个物种在正确的时间出现在正确的地点的机会微乎其微(“特异性”);我们数据中的物种和地点的范围不允许中立的解释。第二,入籍的总人数在任何时代都是由一个“管理者”确定的。以前的物种归化率与净初级生产力随着时间的推移的相关性表明,监管机构与生产力。我们的结论是,生物抗性〈动〉<动>是一个移动的天花板,与生产力控制的阻力。大多数物种只在少数几个地点自然出现,但在许多地点只出现少数物种,这种普遍观察现在具有定量[指数]特征,为物种分布的研究提供了以前无法获得的严格性。

英文摘要:

Theoretically, communities at or near their equilibrium species number resist entry of new species. Such 'biotic resistance' recently has been questioned because of successful entry of alien species into diverse natural communities. Data on 10,409 naturalizations of 5350 plant species over 16 sites dispersed globally show exponential distributions for both species over sites and sites over number of species shared. These exponentials signal a statistical mechanics of species distribution, assuming two conditions. First, species and sites are equivalent, either identical ('neutral'), or so complex that the chance a species is in the right place at the right time is vanishingly small ('idiosyncratic'); the range of species and sites in our data disallows a neutral explanation. Secondly, the total number of naturalisations is fixed in any era by a 'regulator'. Previous correlation of species naturalization rates with net primary productivity over time suggests that regulator is related to productivity. We conclude that biotic resistance is a moving ceiling, with resistance controlled by productivity. The general observation that the majority of species occur naturally at only a few sites but only a few at many now has a quantitative [exponential] character, offering the study of species' distributions a previously unavailable rigor.

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。

↑