Performance Surface Analysis Identifies Consistent Functional Patterns across 10 Morphologically Divergent Terrestrial Turtle Lineages
Performance Surface Analysis Identifies Consistent Functional Patterns across 10 Morphologically Divergent Terrestrial Turtle Lineages
复制标题
性能表面分析确定了 10 个形态不同的陆龟谱系的一致功能模式
DOI：
10.1093/icb/icz072
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发表时间：
2019
影响因子：
2.6
通讯作者：
Stayton, C. Tristan
中科院分区：
文献类型：
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作者：
Stayton, C. Tristan
新开发的利用性能表面的方法-表型和功能性能之间关系的多变量表示-允许研究人员在明确关注功能因素的情况下测试关于适应性景观和进化多样化的假设。在这里，来自三种龟壳功能-甲壳强度、水动力和自扶正-的性能表面的信息被用来检验这样的假设，即从水生生境过渡到陆地生境的海龟谱系显示出与水动力性能重要性降低相一致的贝壳形状演变模式。甲鱼壳是进化功能分析的优秀模型系统。陆生性的演变是对这些方法有效性的一个有趣的测试案例，因为陆龟在贝壳形状上并没有表现出直接的形态趋同模式：许多陆生血统表现出贝壳高度的增加，通常认为这会降低水动力性能，但也有几个陆生血统的陆生进化伴随着贝壳扁平。性能表面分析可以探索这些复杂的模式，并明确地定量分析壳体形状变化的功能含义。对10个谱系进行了检查。几乎所有的陆地谱系，包括那些经历了贝壳高度降低的谱系，都与贝壳流体动力学重要性降低相一致的形态变化有关。这意味着在表现出不同形态模式的谱系中有共同的选择模式。这样的性能研究具有在宏观进化研究中整合适应性和性能数据的巨大潜力。
Newly-developed methods for utilizing performance surfaces—multivariate representations of the relationship between phenotype and functional performance—allow researchers to test hypotheses about adaptive landscapes and evolutionary diversification with explicit attention to functional factors. Here, information from performance surfaces of three turtle shell functions—shell strength, hydrodynamics, and self-righting—is used to test the hypothesis that turtle lineages transitioning from aquatic to terrestrial habitats show patterns of shell shape evolution consistent with decreased importance of hydrodynamic performance. Turtle shells are excellent model systems for evolutionary functional analysis. The evolution of terrestriality is an interesting test case for the efficacy of these methods because terrestrial turtles do not show a straightforward pattern of morphological convergence in shell shape: many terrestrial lineages show increased shell height, typically assumed to decrease hydrodynamic performance, but there are also several lineages where the evolution of terrestriality was accompanied by shell flattening. Performance surface analyses allow exploration of these complex patterns and explicit quantitative analysis of the functional implications of changes in shell shape. Ten lineages were examined. Nearly all terrestrial lineages, including those which experienced decreased shell height, are associated with morphological changes consistent with a decrease in the importance of shell hydrodynamics. This implies a common selective pattern across lineages showing divergent morphological patterns. Performance studies such as these hold great potential for integrating adaptive and performance data in macroevolutionary studies.