Significance testing testate amoeba water table reconstructions
Significance testing testate amoeba water table reconstructions
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DOI：
10.1016/j.quascirev.2016.01.030
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发表时间：
2016-04
影响因子：
4
通讯作者：
R. Payne;K. Babeshko;S. Bellen;J. Blackford;R. Booth;D. Charman;Megan R. Ellershaw;D. Gilbert;P. Hughes;V. Jassey;Łukasz Lamentowicz;M. Lamentowicz;E. Malysheva;D. Mauquoy;Y. Mazei;E. Mitchell;G. Swindles;A. Tsyganov;T. Turner;R. Telford
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文献类型：
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作者：
R. Payne;K. Babeshko;S. Bellen;J. Blackford;R. Booth;D. Charman;Megan R. Ellershaw;D. Gilbert;P. Hughes;V. Jassey;Łukasz Lamentowicz;M. Lamentowicz;E. Malysheva;D. Mauquoy;Y. Mazei;E. Mitchell;G. Swindles;A. Tsyganov;T. Turner;R. Telford
传递函数是古生态学中有价值的工具，但其输出结果可能并不总是有意义的。最近开发的统计检验（“随机TF”）提供了区分重建的可能性更大，那些不太有用。我们应用这个测试的泥炭地地下水位深度的大量重建的基础上有壳变形虫。与我们的预期相反，绝大多数（30例中的25例）重建结果无显著性（P > 0.05）。造成这一结果的根本原因尚不清楚。我们发现随机TF P值与传递函数性能、训练集和重建的属性或传递函数拟合的度量之间没有显著相关性。这些结果令人担忧，但我们认为，现在就对非重大重建的结果进行贴现还为时过早。我们强调需要更严格的评估传递函数输出，复制的结果和生态知情的古生态数据的解释。
Transfer functions are valuable tools in palaeoecology, but their output may not always be meaningful. A recently-developed statistical test (‘randomTF’) offers the potential to distinguish among reconstructions which are more likely to be useful, and those less so. We applied this test to a large number of reconstructions of peatland water table depth based on testate amoebae. Contrary to our expectations, a substantial majority (25 of 30) of these reconstructions gave non-significant results (P > 0.05). The underlying reasons for this outcome are unclear. We found no significant correlation between randomTF P-value and transfer function performance, the properties of the training set and reconstruction, or measures of transfer function fit. These results give cause for concern but we believe it would be extremely premature to discount the results of non-significant reconstructions. We stress the need for more critical assessment of transfer function output, replication of results and ecologically-informed interpretation of palaeoecological data.