Energy gradients and the geographic distribution of local ant diversity
Energy gradients and the geographic distribution of local ant diversity
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DOI：
10.1007/s00442-004-1607-2
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发表时间：
2004-08-01
期刊：
影响因子：
2.7
通讯作者：
Yuan, M
中科院分区：
文献类型：
--
作者：
Kaspari, M;Ward, PS;Yuan, M
地理多样性梯度，甚至在当地社区之间，最终可能是由于物种形成和灭绝速度的地理差异造成的。我们评估了三个模型，能源物种形成，能源丰富度，面积，预测净多样化率的地理趋势如何产生多样性的趋势。我们从澳大利亚、马达加斯加、北美和南美四个省取样了96个垃圾蚂蚁群落。能量-物种形成假说通过准确预测温度多样性曲线的斜率，最好地预测了蚂蚁物种丰富度，并解释了多样性的大部分变化。群落的物种丰富度具有明显的纬向梯度和省际差异。前者消失在温度多样性残差，表明纬度梯度主要来自热带较高的多样化率。然而，省际差异的多样性持续在这些残留南美社区仍然比那些在北美和澳大利亚更多样化，即使温度的影响被删除。
Geographical diversity gradients, even among local communities, can ultimately arise from geographical differences in speciation and extinction rates. We evaluated three models-energy-speciation, energy-abundance, and area-that predict how geographic trends in net diversification rates generate trends in diversity. We sampled 96 litter ant communities from four provinces: Australia, Madagascar, North America, and South America. The energy-speciation hypothesis best predicted ant species richness by accurately predicting the slope of the temperature diversity curve, and accounting for most of the variation in diversity. The communities showed a strong latitudinal gradient in species richness as well as inter-province differences in diversity. The former vanished in the temperature-diversity residuals, suggesting that the latitudinal gradient arises primarily from higher diversification rates in the tropics. However, inter-province differences in diversity persisted in those residuals-South American communities remained more diverse than those in North America and Australia even after the effects of temperature were removed.