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The magnitude of local host specificity for phytophagous insects and its implications for estimates of global species richness

机译：植物吞噬性昆虫的局部寄主特异性的大小及其对全球物种丰富度估计的影响

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Estimates of the global number of arthropod species range from 2 million to more than 30 million species. One of the most critical assumptions affecting the higher of these estimates is the assumed magnitude of host specificity of phytophagous insects, which varies considerably. Difficulties in estimating this value are caused by both lack of satisfactory data sets and lack of methods for its objective calculation. We provide a new method for predicting host specificity for phytophagous insects at a local scale based on the concept of effective specialization. When the insect-plant host associations of a restricted number of plant species are known, we can predict the magnitude of host specificity when more plant species are included. Based on 2561 host observations of 697 beetle species on 50 plant species in the canopies of a tropical dry forest in Panama, we predict that host specificity for adult phytophagous beetles in this forest range from 7% to 10%. These values suggest that the higher estimates of global species richness are not tenable. [References: 27]
机译：对全球节肢动物物种的估计范围从200万到超过3000万。影响这些估计中最高者的最关键的假设之一是植物吞噬性昆虫宿主特异性的假定大小，其差异很大。缺乏令人满意的数据集和缺乏客观计算的方法都造成了估算该值的困难。我们基于有效专业化的概念，提供了一种在本地范围内预测植物吞噬性昆虫宿主特异性的新方法。当已知数量有限的植物物种的昆虫-植物宿主关联时，当包括更多植物物种时，我们可以预测宿主特异性的程度。基于巴拿马热带干旱森林林冠层50种植物中2697种寄主的寄主观察结果，我们预测该林中成虫植物食性甲虫的寄主特异性范围为7％至10％。这些值表明，对全球物种丰富度的更高估计是站不住脚的。 [参考：27]

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