Using habitat models to map diversity:: pan-African species richness of ticks (Acari: Ixodida)
Using habitat models to map diversity:: pan-African species richness of ticks (Acari: Ixodida)
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DOI：
10.1046/j.1365-2699.2000.00419.x
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发表时间：
2000-03-01
影响因子：
3.9
通讯作者：
Cumming, GS
中科院分区：
文献类型：
--
作者：
Cumming, GS
旨在展示如何使用单个物种的Logistic回归模型来改进大陆范围内的物种丰富度估计；呈现非洲硬蜱(Acari：Ixodida)的这些数据；并解决非洲硬蜱物种丰富度是否存在纬度梯度的问题。非洲定位。方法使用34,060条非洲硬蜱收集记录的数据库，以0.25 x 0.25度的分辨率绘制已知非洲硬蜱物种丰富度的泛非洲地图。然后，使用Logistic回归从环境因素估计73个物种的可能分布，并将给定物种发生概率适当高的地点添加到该物种的原始数据中。这些增强的数据被组合在一起，生成了一张预测的全非地区扁虱物种丰富度的分布图。物种丰富度与纬度的关系是沿着横跨一些更广泛收集的地区的样带来考虑的。结果给出了已知和预测的泛非硬蜱物种丰富度地图，并突出了现有数据的不足。利用已知和预测的扁虱物种丰富度估算值进行的相关性表明，扁虱的物种丰富度模式与非洲哺乳动物和鸟类的物种丰富度模式相似，具有纬度梯度，在东赤道非洲的物种丰富度最高。壁虱种类范围是对数正态分布的。主要结论精心构建的概率面提供了比简单的有无地图更有效的绘制物种范围的方法。这些模型是对当前生物地理学方法的有益扩展，在生态学、流行病学和保护方面具有广泛的潜在应用。扁虱物种在大陆范围内的丰富程度与哺乳动物和鸟类的报告趋势相似。
Aims To show how logistic regression models for individual species can be used to produce improved estimates of species richness at a continental scale; to present these data for African ticks (Acari: Ixodida); and to address the question of whether there is a latitudinal gradient in tick species richness.Location Africa.Methods A database of 34,060 collection records for African ticks is used to produce a pan-African map of known tick species richness at 0.25 x 0.25-degree resolution. The likely distributions of seventy-three species are then estimated from environmental factors using logistic regression, and localities where there is a suitably high probability of occurrence for a given species are added to the original data for that species. These augmented data are combined to produce a map of the predicted pan-African distribution of tick species richness. The relationship of species richness to latitude is considered along a transect placed across some of the more extensively collected areas.Results Maps of known and predicted pan-African tick species richness are presented, and deficiencies in the available data are highlighted. Correlations using both known and predicted estimates of tick species richness suggest that ticks follow similar species richness patterns to those described for African mammals and birds, with a latitudinal gradient and highest species richness in east equatorial Africa. Tick species ranges are log-normally distributed.Main conclusions Carefully constructed probability surfaces offer a more powerful approach to mapping species ranges than simple presence-absence maps. Such models are a useful extension to current biogeographical methods and have a wide range of potential applications in ecology,epidemiology and conservation. Tick species richness at a continental scale follows similar trends to those reported for mammals and birds.