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首页> 外文期刊>Marine biology >Latitudinal gradients in species richness for South American Mytilidae and Ostreidae: can alternative hypotheses be evaluated by a correlative approach?
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Latitudinal gradients in species richness for South American Mytilidae and Ostreidae: can alternative hypotheses be evaluated by a correlative approach?

机译：南美Mytilidae和Ostreidae物种丰富度的纬度梯度：可以通过相关方法评估替代假设吗？

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摘要

We tested to what extent mean sea surface temperature, geometric constraints in range size frequency distributions (the mid-domain effect) and geographical coastline distance to the equator are related to species richness of coastal Mytilidae and Ostreidae in the Pacific and Atlantic coasts of South America (excluding islands). The location and magnitude of the peaks in species richness, as well as the shape of the pattern, varied between oceans. Results were not biased by spatial autocorrelation, although strong multicollinearity among predictor variables was detected. However, these regional-extent regression models suggest differences in the causal factors that explain richness gradients of studied bivalves in South American coasts, most likely related to historical events such as the Southeastern Pacific Pleistocene mass extinction of bivalves. Our results reinforced the conclusion that there is no single best explanatory cause for the latitudinal gradient in species richness and showed that the correlativernapproach is not useful when predictor variables are strongly correlated.
机译：我们在多大程度上测试了平均海平面温度，范围大小频率分布的几何约束（中域效应）以及到赤道的地理海岸线距离与南美太平洋和大西洋沿岸的Mytilidae和Ostreidae的物种丰富度有关（不包括岛屿）。物种丰富度峰值的位置和大小，以及图案的形状在海洋之间变化。尽管在预测变量之间检测到强的多重共线性，但结果不受空间自相关的偏见。但是，这些区域范围的回归模型表明，解释南美沿海双壳类动物的丰富度梯度的因果因素存在差异，这很可能与历史事件有关，例如双壳类动物的东南太平洋更新世大规模灭绝。我们的结果加强了这样一个结论，即物种丰富度的纬度梯度没有唯一的最佳解释性原因，并表明当预测变量高度相关时，相关方法无效。

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  • 来源
    《Marine biology》 |2009年第9期|1917-1928|共12页
  • 作者

    Alvar Carranza; Omar Defeo; Juan Carlos Castilla; Thiago Fernando L. V. B. Rangel;

  • 作者单位

    UNDECIMAR, Facultad de Ciencias, Igua 4225, CP 11400 Montevideo, Uruguay Direction Nacional de Recursos Acuaticos, Constituyente 1497, CP 11200 Montevideo, Uruguay;

    UNDECIMAR, Facultad de Ciencias, Igua 4225, CP 11400 Montevideo, Uruguay Direction Nacional de Recursos Acuaticos, Constituyente 1497, CP 11200 Montevideo, Uruguay;

    Facultad de Ciencias Biologicas, Center for Advanced Studies in Ecology and Biodiversity (CASEB), Pontificia Universidad Catolica de Chile, Casilla 114-D, Santiago, Chile;

    Department of Ecology and Evolutionary Biology, University of Connecticut, Storrs, CT 06269, USA;

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