The abundant centre hypothesis (ACH) predicts a negative relationship between species abundance and the distance to the geographical range centre. Since its formulation, empirical tests of the ACH have involved different settings (e.g. the distance to the ecological niche or to the geographical range centre), but studies found contrasting support for this hypothesis. Here, we evaluate whether these discrepancies might stem from differences regarding the context in which the ACH is tested (geographical or environmental), how distances are measured, how species envelopes are delineated, how the relationship is evaluated and which data are used.

中文翻译：

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在已发布的数据集上使用强大的多设置推理框架仍然显示对丰富中心假设的支持有限：其他数据集需要更多测试

丰富中心假设 (ACH) 预测物种丰度与到地理范围中心的距离之间存在负相关关系。自其制定以来，ACH 的实证测试涉及不同的设置（例如到生态位或地理范围中心的距离），但研究发现对这一假设的支持相反。在这里，我们评估这些差异是否可能源于测试 ACH 的背景（地理或环境）、距离的测量方式、物种包络的划分方式、关系的评估方式以及使用的数据的差异。