Measuring plant interactions: A new comparative index
Measuring plant interactions: A new comparative index
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DOI：
10.1890/03-0650
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发表时间：
2004-10-01
期刊：
影响因子：
4.8
通讯作者：
Pugnaire, FI
中科院分区：
文献类型：
--
作者：
Armas, C;Ordiales, R;Pugnaire, FI
我们提出了一个指数，以衡量在植物中的相对相互作用强度（RII）具有较强的数学和统计特性，克服了其他常用的指数所示的问题。RII有明确的限制[-1，+1];是对称的零，具有相同的绝对值的竞争和促进;是线性的;在其范围内没有不连续性。因此，它可以安全地用于统计和数学运算。RII分布近似于正态分布，平均值等于真实的总体指数，并且可以导出抽样方差。其强大的统计特性使RII适合用于参数荟萃分析。它可以应用于任何类型的相互作用（从竞争排斥到共生），并且在通常公布的相互作用强度范围内，它提供了最一致的结果。由于RII使用基本的算术运算符，它可以按比例放大，并用于测量在社区水平上的多特异性相互作用。
We propose an index to measure the relative interaction intensity in plants (RII) with strong mathematical and statistical properties which overcome problems shown by other frequently used indices. RII has defined limits [-1, +1]; is symmetrical around zero, with identical absolute values for competition and facilitation; is linear; and does not have discontinuities in its range. It is therefore safe to use in statistical and mathematical operations. RII distribution is approximately normal, with means equal to the true population index and a sampling variance that can be derived. Its strong statistical properties make RII proper for use in parametric meta-analyses. It can be applied to any kind of interaction (from competitive exclusion to symbiosis) and in commonly published ranges of interaction intensity it offers the most consistent results. Because RII uses basic arithmetical operators, it can be scaled up and used to measure multispecific interactions at the community level.