Latitudinal diversity gradients in Mesozoic non-marine turtles.
Latitudinal diversity gradients in Mesozoic non-marine turtles.
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DOI：
10.1098/rsos.160581
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发表时间：
2016-11
影响因子：
3.5
通讯作者：
Barrett PM
中科院分区：
文献类型：
--
作者：
Nicholson DB;Holroyd PA;Valdes P;Barrett PM
纬度生物多样性梯度（LBG）-随着纬度的降低而增加的分类丰富度的模式-在现代生物区系的结构中是普遍的。然而，一些淡水类群在中纬度地区显示出最丰富的物种;例如，现存的龟鳖类（海龟、水龟和陆龟）在北纬25度显示出最大的多样性，这种模式有时被归因于最近气候介导的物种多样化的爆发。在这里，我们测试这种模式是否也具有中生代海龟分布的特点，以确定它是否是在最初的多样化或作为一个更现代的现象。利用全球非海相龟鳖属的分布数据，我们发现，子采样丰富度在侏罗纪的15-30° N，30-45° N通过白垩纪到坎帕尼亚，并在马斯特里赫特从30°到60° N的古纬度的峰值。在南半球没有一个显着的多样性高峰是一致的气候模型和海龟生态位建模，证明在冈瓦纳缺乏合适的海龟栖息地在侏罗纪和晚白垩世的结果。我们的分析证实，现代龟类LBG有一个深时间的起源，并进一步表明，LBG并不总是表示为一个光滑的，赤道到极点的分布。
The latitudinal biodiversity gradient (LBG)—the pattern of increasing taxonomic richness with decreasing latitude—is prevalent in the structure of the modern biota. However, some freshwater taxa show peak richness at mid-latitudes; for example, extant Testudines (turtles, terrapins and tortoises) exhibit their greatest diversity at 25° N, a pattern sometimes attributed to recent bursts of climatically mediated species diversification. Here, we test whether this pattern also characterizes the Mesozoic distribution of turtles, to determine whether it was established during either their initial diversification or as a more modern phenomenon. Using global occurrence data for non-marine testudinate genera, we find that subsampled richness peaks at palaeolatitudes of 15–30° N in the Jurassic, 30–45° N through the Cretaceous to the Campanian, and from 30° to 60° N in the Maastrichtian. The absence of a significant diversity peak in southern latitudes is consistent with results from climatic models and turtle niche modelling that demonstrate a dearth of suitable turtle habitat in Gondwana during the Jurassic and Late Cretaceous. Our analyses confirm that the modern testudinate LBG has a deep-time origin and further demonstrate that LBGs are not always expressed as a smooth, equator-to-pole distribution.
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影响因子：
5.9
作者：
Hecnar, SJ
通讯作者：
Hecnar, SJ
影响因子：
4.5
作者：
Downing, J. A.;Prairie, Y. T.;Middelburg, J. J.
通讯作者：
Middelburg, J. J.
影响因子：
0.7
作者：
Buhlmann, Kurt A.;Akre, Thomas S. B.;Gibbons, J. Whitfield
通讯作者：
Gibbons, J. Whitfield
DOI：
10.1098/rspb.2010.0179
发表时间：
2010-07-22
影响因子：
4.7
作者：
Buckley, Lauren B.;Davies, T. Jonathan;Wiens, John J.
通讯作者：
Wiens, John J.
影响因子：
16.6
作者：
Mannion, Philip D.;Benson, Roger B. J.;Butler, Richard J.
通讯作者：
Butler, Richard J.