Mutual interference is common and mostly intermediate in magnitude.
Mutual interference is common and mostly intermediate in magnitude.
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DOI：
10.1186/1472-6785-11-1
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发表时间：
2011-01-06
期刊：
影响因子：
--
通讯作者：
Vasseur DA
中科院分区：
文献类型：
--
作者：
Delong JP;Vasseur DA
当其他个体的存在对资源的获取产生负面影响时，就会发生干扰竞争。在一个物种或种群内，这被称为相互干扰，它通常是用捕食者数量的标度指数m来建模的。最初，相互干扰被认为是沿着从猎物依赖（无干扰; m = 0）到比例依赖（m = -1）的连续体变化的，但在20世纪90年代和21世纪初的辩论集中在猎物或比例依赖是否是更好的简化。最近有人认为，相互干扰可能主要是中间的（即在猎物和比例依赖之间），但这种可能性尚未得到经验评估。我们从文献中收集了相互干扰的估计，分析了其他数据，并创建了迄今为止最大的相互干扰无偏估计汇编。在这个数据集中，被捕食者依赖和比例依赖的选择都被观察到，但只有一个数据集是一致的被捕食者依赖。存在比率依赖性的趋势，反映为中位数m为-0.7，平均值m为-0.8。总的来说，数据支持这样一种假设，即干扰的强度大多是中等的。数据还表明，干扰竞争是常见的，至少在迄今为止研究的系统中是如此。关于不同的因素如何影响干扰，以及干扰是否可以被视为特定人口的一个特征，或者随着人口密度的增加，干扰是否通常从低水平向高水平转变，仍然存在重大问题。
Interference competition occurs when access to resources is negatively affected by the presence of other individuals. Within a species or population, this is known as mutual interference, and it is often modelled with a scaling exponent, m, on the number of predators. Originally, mutual interference was thought to vary along a continuum from prey dependence (no interference; m = 0) to ratio dependence (m = -1), but a debate in the 1990's and early 2000's focused on whether prey or ratio dependence was the better simplification. Some have argued more recently that mutual interference is likely to be mostly intermediate (that is, between prey and ratio dependence), but this possibility has not been evaluated empirically. We gathered estimates of mutual interference from the literature, analyzed additional data, and created the largest compilation of unbiased estimates of mutual interference yet produced. In this data set, both the alternatives of prey dependence and ratio dependence were observed, but only one data set was consistent with prey dependence. There was a tendency toward ratio dependence reflected by a median m of -0.7 and a mean m of -0.8. Overall, the data support the hypothesis that interference is mostly intermediate in magnitude. The data also indicate that interference competition is common, at least in the systems studied to date. Significant questions remain regarding how different factors influence interference, and whether interference can be viewed as a characteristic of a particular population or whether it generally shifts from low to high levels as populations increase in density.
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影响因子：
4.8
作者：
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影响因子：
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作者：
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10.1111/j.1570-7458.1976.tb02634.x
发表时间：
1976-01-01
影响因子：
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作者：
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